A heat treatment device for nickel-titanium alloy springs

Abstract

The present application relates to the technical field of spring heat treatment, and specifically discloses a heat treatment device for nickel-titanium alloy springs, comprising: a heat treatment box for tempering nickel-titanium alloy springs; a placement rod for placing nickel-titanium alloy springs; a clamping device for adjusting the pitch of nickel-titanium alloy springs; the clamping device comprises a clamping bracket, the clamping bracket is arranged outside the heat treatment box, the clamping bracket is connected with a first push cylinder and a second push cylinder, the output ends of the first push cylinder and the second push cylinder are facing the heat treatment box, the output end of the first push cylinder is connected with a first clamping terminal, and the output end of the second push cylinder is connected with a second clamping terminal. Due to the use of the clamping device, the supporting rings at both ends of the clamping spring can be clamped, and the length of the spring can be adjusted, thereby adjusting the pitch of the spring, thereby enhancing the tempering effect of the spring. At the same time, by setting a guiding mechanism, the feeding and withdrawing operations during the heat treatment of the spring are simple.

Description

Technical Field

[0001] The present application relates to the technical field of spring heat treatment, and in particular to a heat treatment device for nickel-titanium alloy springs. Background Art

[0002] Nickel-titanium alloy is a shape memory alloy, which is a special alloy that can automatically restore its plastic deformation to its original shape at a certain temperature. Nickel-titanium alloy has excellent performance in both civil and medical fields due to its unique shape memory and superelastic functionality, excellent corrosion resistance and biological properties, especially its shape memory ability, which can show different shapes at different temperatures. This feature is very prominent in springs.

[0003] Nickel-titanium alloy springs need to be heat treated during the production process. Existing nickel-titanium alloy heat treatment devices have certain disadvantages when used. They have a simple structure and cannot accurately control and adjust the pitch of the spring during the heat treatment process, thereby affecting the tempering effect of the spring. Summary of the invention

[0004] The present application solves the technical problem of accurately controlling and adjusting the pitch of the spring during the heat treatment process in the prior art by providing a heat treatment equipment for nickel-titanium alloy springs, thereby achieving the change of the length of the effective coil of the spring during heat treatment, and then adjusting the pitch of the spring, thereby enhancing the tempering effect of the spring.

[0005] The present application provides a heat treatment device for a nickel-titanium alloy spring, comprising:

[0006] Heat treatment box, used for tempering of nickel-titanium alloy springs;

[0007] a placement rod for placing a nickel-titanium alloy spring;

[0008] A clamping device for adjusting the pitch of the nickel-titanium alloy spring;

[0009] The clamping device comprises a clamping bracket, the clamping bracket is connected to a first pushing cylinder and a second pushing cylinder, the output end of the first pushing cylinder is connected to a first clamping terminal, and the output end of the second pushing cylinder is connected to a second clamping terminal.

[0010] Furthermore, the first clamping terminal and the second clamping terminal respectively correspond to the support rings at both ends of the nickel-titanium alloy spring. After the output ends of the first push cylinder and the second push cylinder are extended, the first clamping terminal clamps the outer end support ring of the spring, and the second clamping terminal clamps the inner end support ring of the spring. Then, the output end of the first push cylinder retracts to change the length of the effective ring of the spring, thereby adjusting the pitch of the spring.

[0011] When the spring is placed on the placement rod, it is in a horizontal state, and the extension directions of the first pushing cylinder and the second pushing cylinder are both parallel to the placement rod in the horizontal state.

[0012] Further, the first clamping terminal includes a first fixing plate, the first fixing plate is connected to the output end of the first pushing cylinder, the first fixing plate is connected to the first clamping cylinder, the output end of the first clamping cylinder is connected to the first clamping seat, the first clamping seat is provided with a first lifting cylinder, the output end of the first lifting cylinder is vertically upward and connected to a first arc-shaped slide groove, the first arc-shaped slide groove is located below the placement rod, and the first arc-shaped slide groove is coaxial with the spring, a first sliding seat is slidably provided in the first arc-shaped slide groove, and the first sliding seat is connected to the first clamping plate;

[0013] The side of the first fixing plate facing the spring is the inner side, the first pushing cylinder is arranged on one side of the inner side of the first fixing plate, the extension direction of the first clamping cylinder is parallel to the extension direction of the first pushing cylinder, and the output end of the first clamping cylinder faces the first fixing plate.

[0014] Further, the second clamping terminal includes a second fixing plate, the second fixing plate is connected to the inner end of the placement rod, the output end of the second pushing cylinder is connected to the second clamping seat, the second clamping seat is provided with a second lifting cylinder, the output end of the second lifting cylinder is vertically upward and connected to a second arc-shaped slide groove, the second arc-shaped slide groove is located below the placement rod, and the second arc-shaped slide groove is coaxial with the spring, a second sliding seat is slidably provided in the second arc-shaped slide groove, and the second sliding seat is connected to the second clamping plate;

[0015] The side of the second fixing plate facing away from the spring is the outer side, the second pushing cylinder is arranged on one side of the outer side of the second fixing plate, and the output end of the second pushing cylinder faces the second fixing plate.

[0016] Furthermore, it also includes a guiding mechanism, which is arranged outside the heat treatment box. When the heat treatment box is opened, the guiding mechanism is connected to the placement rod, and the nickel-titanium alloy spring is conveniently moved between the guiding mechanism and the placement rod, thereby facilitating the removal and placement of the nickel-titanium alloy spring.

[0017] Further, the guiding mechanism comprises a guiding rod and a docking rod, one end of the guiding rod is connected to the output end of the winding structure of the spring, the docking rod is arranged between the guiding rod and the placement rod, the first output end of the docking rod is opposite to the guiding rod, and the second output end of the docking rod is opposite to the placement rod;

[0018] Two vertical frames are vertically arranged in the heat treatment box, the outer end of the placement rod is located between the two vertical frames, and the inner surface of the vertical frame is provided with a clamping protrusion. When the placement rod moves to the area between the two clamping protrusions, the placement rod is clamped and fixed by the two clamping protrusions, and the placement rod is in a horizontal state at this time.

[0019] Further, when the docking rod is in a horizontal state, the second output end of the docking rod extends out and connects with the placement rod;

[0020] When the docking rod is in a state of left high and right low, the first output end of the docking rod is connected to the guide rod, and at this time the placement rod is located above the clamping protrusion, and the spring passes through the placement rod and the docking rod in sequence from the winding structure and enters the placement rod, thereby realizing the feeding of the heat treatment process;

[0021] When the docking rod is in the left-low and right-high state, the connection between the guide rod and the docking rod is disconnected, and the docking rod is connected to the placement rod. At this time, the placement rod is located under the clamping protrusion, and the spring slides from the placement rod to the docking rod, and then falls off from the docking rod, thereby realizing the material withdrawal during the heat treatment process.

[0022] Furthermore, a first docking outer cylinder and a second docking outer cylinder are respectively provided at both ends of the docking rod, a first docking cylinder is provided in the first docking outer cylinder, an output end of the first docking cylinder is connected to a first docking inner cylinder, the first docking inner cylinder extends out of the first docking outer cylinder and is connected to a first docking plug rod, a second docking cylinder is provided in the second docking outer cylinder, an output end of the second docking cylinder is connected to a second docking inner cylinder, the second docking inner cylinder extends out of the second docking outer cylinder and is connected to a second docking plug rod; a guide cavity is provided at the end of the guide rod, the guide cavity corresponds to the first docking plug rod, and an placement cavity is provided at the outer end of the placement rod, the placement cavity corresponds to the second docking plug rod.

[0023] The technical solution provided by this application has at least the following technical effects or advantages:

[0024] 1. Due to the use of a clamping device, in which the first clamping terminal and the second clamping terminal correspond to the supporting rings at both ends of the nickel-titanium alloy spring respectively, after the output ends of the first push cylinder and the second push cylinder are extended, the first clamping terminal clamps the outer end supporting ring of the spring, and the second clamping terminal clamps the inner end supporting ring of the spring, and then the output end of the first push cylinder retracts to change the length of the effective ring of the spring, thereby adjusting the pitch of the spring, thereby enhancing the tempering effect of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is an overall schematic diagram of the heat treatment equipment for the nickel-titanium alloy spring in Example 1 of the present application;

[0026] Figure 2 It is a cross-sectional schematic diagram of the heat treatment equipment of the nickel-titanium alloy spring in Example 1 of the present application;

[0027] Figure 3 This is a schematic diagram of the structure of the clamping device in Example 1 of the present application;

[0028] Figure 4 This is a schematic structural diagram of the clamping device in Embodiment 1 of the present application from another viewing angle;

[0029] Figure 5 For this application Figure 4 A magnified schematic diagram of the structure at center A;

[0030] Figure 6 For this application Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0031] Figure 7 This is an overall schematic diagram of the heat treatment equipment for the nickel-titanium alloy spring in Example 2 of the present application;

[0032] Figure 8 This is a schematic diagram of the structure of the guide mechanism in the second embodiment of the present application;

[0033] Fig. 9 This is a schematic diagram of the structure of the guide rod in the second embodiment of the present application;

[0034] Fig.10 This is a schematic diagram of the structure of the docking rod in the second embodiment of the present application;

[0035] Fig.11 This is a schematic structural diagram of the guide rod in the second embodiment of the present application from another perspective;

[0036] Fig.12 This is a schematic structural diagram of the docking rod in the second embodiment of the present application from another viewing angle;

[0037] Fig.13 This is a schematic cross-sectional view of the docking rod in the second embodiment of the present application;

[0038] Fig.14 This is a schematic diagram of the structure of the placement rod in the second embodiment of the present application;

[0039] Fig.15 This is a schematic diagram of the structure of the clamping protrusion in the second embodiment of the present application.

[0040] In the figure: 1. heat treatment box; 2. placement rod; 3. clamping device; 4. guide mechanism;

[0041] 101. vertical frame; 102. clamping protrusion;

[0042] 301, clamping bracket; 302, first pushing cylinder; 303, second pushing cylinder; 304, first clamping terminal; 305, second clamping terminal;

[0043] 3041, first fixed plate; 3042, first clamping cylinder; 3043, first clamping seat; 3044, first lifting cylinder; 3045, first arc-shaped slide groove; 3046, first sliding seat; 3047, first clamping plate;

[0044] 3051, second fixed plate; 3052, second clamping seat; 3053, second lifting cylinder; 3054, second arc-shaped slide groove; 3055, second sliding seat; 3056, second clamping plate;

[0045] 41. Guide rod; 42. Docking rod; 43. Lifting and lowering adjustment assembly;

[0046] 411, guide base; 412, first guide cylinder; 413, second guide cylinder; 414, third guide cylinder; 415, first guide docking groove; 416, first guide docking seat; 417, second guide docking groove; 418, second guide docking seat; 419, third guide docking groove; 4110, third guide docking seat;

[0047] 421, first docking outer cylinder; 422, second docking outer cylinder; 423, first docking cylinder; 424, first docking inner cylinder; 425, first docking plug rod; 426, second docking cylinder; 427, second docking inner cylinder; 428, second docking plug rod; 429, guide cavity; 4210, placement cavity;

[0048] 431, docking base; 432, first docking cylinder; 433, second docking cylinder; 434, first docking seat; 435, second docking seat; 436, first docking groove; 437, second docking groove. DETAILED DESCRIPTION

[0049] The embodiment of the present application discloses a heat treatment device for nickel-titanium alloy springs, which adopts a clamping device 3, which can clamp the supporting rings at both ends of the spring and adjust the length of the spring, thereby adjusting the pitch of the spring, thereby enhancing the tempering effect of the spring. At the same time, due to the provision of a guiding mechanism 4, the guiding mechanism 4 is arranged between the winding structure of the spring and the placement rod 2. The spring is directly transported to the heat treatment box 1 after winding and forming, so as to achieve fast and accurate feeding of the spring. At the same time, when the docking rod 42 changes to a left-low and right-high state, and there is no contact between the docking rod 42 and the guide rod 41, the spring can slide from the placement rod 2 to the docking rod 42, and then slide from the left end of the docking rod 42, so as to achieve fast withdrawal of the spring, making the feeding and withdrawing operations during the spring heat treatment process simple.

[0050] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0051] Embodiment 1

[0052] Reference Figures 1 to 15 The present invention provides a heat treatment device for a nickel-titanium alloy spring, comprising a heat treatment box 1 for tempering the nickel-titanium alloy spring, a placement rod 2 for placing the nickel-titanium alloy spring, and a clamping device 3 for adjusting the pitch of the nickel-titanium alloy spring. The placement rod 2 is horizontally arranged in the heat treatment box 1, the nickel-titanium alloy spring is horizontally sleeved on the placement rod 2, and the clamping device 3 is placed in the heat treatment box 1. When the clamping device 3 is in action, its output end clamps the support rings at both ends of the spring and adjusts the length of the spring, thereby adjusting the pitch of the spring.

[0053] Specifically, refer to Figure 3 The clamping device 3 includes a clamping bracket 301, the clamping bracket 301 is connected to a first pushing cylinder 302 and a second pushing cylinder 303, the output end of the first pushing cylinder 302 is connected to a first clamping terminal 304, and the output end of the second pushing cylinder 303 is connected to a second clamping terminal 305.

[0054] In the clamping device 3 of the present embodiment, the first clamping terminal 304 and the second clamping terminal 305 respectively correspond to the supporting rings at both ends of the nickel-titanium alloy spring. After the output ends of the first pushing cylinder 302 and the second pushing cylinder 303 are extended, the first clamping terminal 304 clamps the outer end supporting ring of the spring, and the second clamping terminal 305 clamps the inner end supporting ring of the spring. Then, the output end of the first pushing cylinder 302 retracts to change the length of the effective ring of the spring, thereby adjusting the pitch of the spring.

[0055] It should be noted that when the spring is placed on the placement rod 2, it is in a horizontal state, and the extension directions of the first pushing cylinder 302 and the second pushing cylinder 303 are both parallel to the placement rod 2 in the horizontal state.

[0056] Further, refer to Figure 4 and Figure 5The first clamping terminal 304 includes a first fixed plate 3041, which is connected to the output end of the first pushing cylinder 302, and the first fixed plate 3041 is connected to the first clamping cylinder 3042, and the output end of the first clamping cylinder 3042 is connected to the first clamping seat 3043, and the first clamping seat 3043 is provided with a first lifting cylinder 3044, and the output end of the first lifting cylinder 3044 is vertically upward and connected to a first arc-shaped slide groove 3045, the first arc-shaped slide groove 3045 is located below the placement rod 2, and the first arc-shaped slide groove 3045 is coaxial with the spring, and a first sliding seat 3046 is slidably provided in the first arc-shaped slide groove 3045, and the first sliding seat 3046 is connected to the first clamping plate 3047.

[0057] Among them, the side of the first fixed plate 3041 facing the spring is the inner side, the first pushing cylinder 302 is arranged on one side of the inner side of the first fixed plate 3041, the extension direction of the first clamping cylinder 3042 is parallel to the extension direction of the first pushing cylinder 302, and the output end of the first clamping cylinder 3042 faces the first fixed plate 3041.

[0058] When the first clamping terminal 304 is actuated, the output end of the first pushing cylinder 302 is extended first, driving the first fixed plate 3041 to move the outer end of the spring, and then the output end of the first lifting cylinder 3044 is extended, driving the first arc-shaped slide groove 3045 to move upward, so that the first sliding seat 3046 and the first clamping plate 3047 move upward, and the first clamping plate 3047 is inserted into the gap between the outer end support circle and the effective circle of the spring, and then the output end of the first clamping cylinder 3042 retracts, so that the first clamping plate 3047 moves toward the first fixed plate 3041, and the first fixed plate 3041 and the first clamping plate 3047 work together to clamp the outer end support circle of the spring.

[0059] It should be noted that, in this embodiment, by setting the first arc-shaped groove 3045, the first arc-shaped groove 3045 is coaxial with the spring after moving up. When the first sliding seat 3046 moves along the first arc-shaped groove 3045, the insertion position of the first clamping plate 3047 can be changed, so that the first clamping plate 3047 is inserted into the gap between the outer end support circle and the effective circle of the spring.

[0060] Further, refer to Figure 4 and Figure 6The second clamping terminal 305 includes a second fixed plate 3051, which is connected to the inner end of the placement rod 2. The output end of the second pushing cylinder 303 is connected to the second clamping seat 3052. The second clamping seat 3052 is provided with a second lifting cylinder 3053. The output end of the second lifting cylinder 3053 is vertically upward and connected to a second arc-shaped slide groove 3054. The second arc-shaped slide groove 3054 is located below the placement rod 2, and the second arc-shaped slide groove 3054 is coaxial with the spring. A second sliding seat 3055 is slidably provided in the second arc-shaped slide groove 3054, and the second sliding seat 3055 is connected to the second clamping plate 3056.

[0061] The side of the second fixing plate 3051 facing away from the spring is the outside, the second pushing cylinder 303 is arranged on the outside side of the second fixing plate 3051 , and the output end of the second pushing cylinder 303 faces the second fixing plate 3051 .

[0062] When the second clamping terminal 305 is actuated, the output end of the second pushing cylinder 303 is extended first, driving the second clamping seat 3052 to move to the inner end of the spring, and then the output end of the second lifting cylinder 3053 is extended, driving the second arc-shaped slide groove 3054 to move upward, so that the second sliding seat 3055 and the second clamping plate 3056 move upward, and the second clamping plate 3056 is inserted into the gap between the inner end support circle and the effective circle of the spring, and then the output end of the second pushing cylinder 303 continues to extend, so that the second clamping plate 3056 moves toward the second fixed plate 3051, and the second fixed plate 3051 and the second clamping plate 3056 work together to clamp the inner end support circle of the spring.

[0063] It should be noted that, in this embodiment, a second arc-shaped groove 3054 is provided, and the second arc-shaped groove 3054 is coaxial with the spring after being moved upward. When the second sliding seat 3055 moves along the second arc-shaped groove 3054, the insertion position of the second clamping plate 3056 can be changed, so that the second clamping plate 3056 is inserted into the gap between the inner end support circle and the effective circle of the spring.

[0064] It is worth noting that, in this embodiment, after the first clamping terminal 304 and the second clamping terminal 305 respectively clamp the supporting rings at both ends of the spring, the output ends of the first pushing cylinder 302 and the first clamping cylinder 3042 retract synchronously, thereby changing the length of the effective ring of the spring and further changing the pitch of the spring.

[0065] At the same time, each cylinder in this embodiment adopts a high temperature resistant cylinder so that it can still work in a tempering environment.

[0066] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0067] In this embodiment, by providing the clamping device 3, the supporting rings at both ends of the clamping spring can be clamped and the length of the spring can be adjusted, thereby adjusting the pitch of the spring, thereby enhancing the tempering effect of the spring.

[0068] Embodiment 2

[0069] Reference Figures 7 to 15 The heat treatment equipment for the nickel-titanium alloy spring in this embodiment, based on the structure of the first embodiment, further includes a guide mechanism 4, which is arranged outside the heat treatment box 1. When the heat treatment box 1 is opened, the guide mechanism 4 is connected to the placement rod 2, and the nickel-titanium alloy spring is convenient to move between the guide mechanism 4 and the placement rod 2, thereby facilitating the taking and placing of the nickel-titanium alloy spring.

[0070] Specifically, refer to Figure 7 The guiding mechanism 4 includes a guiding rod 41 and a docking rod 42. One end of the guiding rod 41 is connected to the output end of the winding structure of the spring. The docking rod 42 is arranged between the guiding rod 41 and the placement rod 2. The first output end of the docking rod 42 is opposite to the guiding rod 41, and the second output end of the docking rod 42 is opposite to the placement rod 2.

[0071] Based on the above settings, refer to Fig.15 Two vertical frames 101 are vertically arranged in the heat treatment box 1, the outer end of the placement rod 2 is located between the two vertical frames 101, and the inner surface of the vertical frame 101 is provided with a clamping protrusion 102. When the placement rod 2 moves to the area between the two clamping protrusions 102, the placement rod 2 is clamped and fixed by the two clamping protrusions 102, and the placement rod 2 is in a horizontal state.

[0072] In this embodiment, the guide rod 41 is in an inclined state, and a section of the guide rod 41 is connected to the output end of the winding structure of the spring. After the spring is wound, it is directly inserted into the guide rod 41, and then slides downward along the guide rod 41, passes through the docking rod 42, and falls on the placement rod 2, that is, enters the heat treatment box 1, thereby completing the feeding of the heat treatment process.

[0073] In this embodiment, the inclination state of the docking rod 42 and the placement rod 2 can be changed. When the docking rod 42 is in a horizontal state, the second output end of the docking rod 42 extends out and connects with the placement rod 2. When the docking rod 42 is in a state of left high and right low, the first output end of the docking rod 42 connects with the guide rod 41. At this time, the placement rod 2 is located above the clamping protrusion 102. The spring passes through the placement rod 2 and the docking rod 42 in sequence from the winding structure and enters the placement rod 2, thereby realizing the feeding of the heat treatment process. When the docking rod 42 is in a state of left low and right high, the connection between the guide rod 41 and the docking rod 42 is disconnected, and the docking rod 42 is connected to the placement rod 2. At this time, the placement rod 2 is located below the clamping protrusion 102, and the spring slides from the placement rod 2 to the docking rod 42, and then falls off from the docking rod 42, thereby realizing the withdrawal of the heat treatment process.

[0074] Specifically, refer to Fig.13 In this embodiment, the two ends of the docking rod 42 are respectively provided with a first docking outer cylinder 421 and a second docking outer cylinder 422, the first docking outer cylinder 421 is provided with a first docking cylinder 423, the output end of the first docking cylinder 423 is connected with a first docking inner cylinder 424, the first docking inner cylinder 424 extends out of the first docking outer cylinder 421 and is connected with a first docking plug rod 425, the second docking outer cylinder 422 is provided with a second docking cylinder 426, the output end of the second docking cylinder 426 is connected with a second docking inner cylinder 427, the second docking inner cylinder 427 extends out of the second docking outer cylinder 422 and is connected with a second docking plug rod 428.

[0075] Reference Fig. 9 and Fig.13 A guide cavity 429 is provided at the end of the guide rod 41, and the guide cavity 429 corresponds to the first docking rod 425. A placement cavity 4210 is provided at the outer end of the placement rod 2, and the placement cavity 4210 corresponds to the second docking rod 428.

[0076] Furthermore, in order to achieve the change of the tilt state of the docking rod 42 and the placement rod 2 , the guiding mechanism 4 also includes a lifting and adjusting component 43 , and the lifting and adjusting component 43 is connected to the docking rod 42 .

[0077] Among them, when the output end of the lifting and adjusting component 43 is in the first action state, the docking rod 42 is in a horizontal state, so that one of the output ends of the docking rod 42 can dock with the placement rod 2; when the output end of the lifting and adjusting component 43 is in the second action state, the docking rod 42 is in a left-high and right-low state, so that the other output end of the docking rod 42 can dock with the guide rod 41; when the output end of the lifting and adjusting component 43 is in the third action state, the docking rod 42 is in a left-low and right-high state.

[0078] Specifically, refer to Fig.10 The lifting and adjusting component 43 includes a docking base 431 arranged below the docking rod 42, and a first docking cylinder 432 and a second docking cylinder 433 are arranged on the docking base 431. The output end of the first docking cylinder 432 is vertically upward and connected to the first docking seat 434, and the output end of the second docking cylinder 433 is vertically upward and connected to the second docking seat 435. The lower surface of the docking rod 42 is provided with a first docking groove 436 and a second docking groove 437. The first docking groove 436 is adapted to the first docking seat 434, and the second docking groove 437 is adapted to the second docking seat 435.

[0079] When the inclination state of the docking rod 42 and the placement rod 2 is adjusted, the output ends of the first docking cylinder 432 and the second docking cylinder 433 extend, so that the docking rod 42 is in a horizontal state and the height is flush with the placement rod 2 in a horizontal state, and then the output end of the second docking cylinder 426 extends, driving the second docking plug rod 428 to be inserted into the placement cavity 4210, and the docking rod 42 is connected to the placement rod 2 as a whole, and then the output ends of the first docking cylinder 432 and the second docking cylinder 433 extend, but the first docking cylinder 432 extends longer, so that the docking rod 42 and the placement rod 2 are connected. 2 is tilted and in a state where the left side is higher than the right side. At the same time, the left end of the combination is opposite to the guide rod 41. At this time, the output end of the first docking cylinder 423 extends out, driving the first docking plug rod 425 to move, so that the first docking plug rod 425 is inserted into the guide cavity 429, and the docking rod 42 is connected to the guide rod 41 as a whole. At this time, the guide rod 41, the docking rod 42, and the placement rod 2 are connected as a whole and are in an inclined state. The spring can move smoothly from the spring winding molding structure, the guide rod 41, the docking rod 42 and the placement rod 2 in sequence to facilitate the feeding of the heat treatment process.

[0080] Further, refer to Fig. 9 The guide rod 41 is arranged obliquely, and a guide base 411 is arranged below the guide rod 41, and a first guide cylinder 412, a second guide cylinder 413 and a third guide cylinder 414 are arranged on the guide base 411, and the output ends of the first guide cylinder 412, the second guide cylinder 413 and the third guide cylinder 414 are all vertically upward, and the output ends of the first guide cylinder 412, the second guide cylinder 413 and the third guide cylinder 414 are respectively facing the front, middle and rear sections of the guide rod 41.

[0081] Reference Fig. 9 and Fig.11 A first guide docking groove 415 is provided on the bottom surface of the front section of the guide rod 41, a first guide docking seat 416 is provided on the output end of the first guide cylinder 412, and the first guide docking seat 416 corresponds to the first guide docking groove 415; a second guide docking groove 417 is provided on the bottom surface of the middle section of the guide rod 41, a second guide docking seat 418 is provided on the output end of the second guide cylinder 413, and the second guide docking seat 418 corresponds to the second guide docking groove 417; a third guide docking groove 419 is provided on the bottom surface of the rear section of the guide rod 41, and a third guide docking seat 4110 is provided on the output end of the third guide cylinder 414, and the third guide docking seat 4110 corresponds to the third guide docking groove 419.

[0082] It should be noted that, in this embodiment, after the spring falls from the spring winding structure onto the guide rod 41, it will pass through the output ends of the first guide cylinder 412, the second guide cylinder 413 and the third guide cylinder 414 in sequence. When the spring passes through the connection between the output end of the first guide cylinder 412 and the guide rod 41, the output end of the first guide cylinder 412 retracts, and the other two cylinders remain in a state of being extended and connected, so that the spring can continue to move downward from the first guide cylinder 412. When the spring moves to the connection between the output end of the second guide cylinder 413 and the guide rod 41, the output end of the first guide cylinder 412 retracts, and the other two cylinders remain in a state of being extended and connected, so that the spring can continue to move downward from the first guide cylinder 412. When the spring moves to the connection point between the output end of the third guide cylinder 414 and the guide rod 41, the output end of the second guide cylinder 413 is retracted, and the output end of the first guide cylinder 412 is reset, and is maintained in the extended connected state together with the third guide cylinder 414, so that the spring can continue to move downward from the second guide cylinder 413. When the spring moves to the connection point between the output end of the third guide cylinder 414 and the guide rod 41, the output end of the second guide cylinder 413 is reset, and is maintained in the extended connected state together with the first guide cylinder 412, so that the spring can continue to move downward from the third guide cylinder 414.

[0083] Afterwards, the spring passes through the first docking rod 425, the first docking inner tube 424, the first docking outer tube 421, the docking rod 42, the second docking outer tube 422, the second docking inner tube 427, and the second docking rod 428 in sequence. During this process, it will pass through the output ends of the first docking cylinder 432 and the second docking cylinder 433 in sequence. When the spring passes through the connection between the output end of the first docking cylinder 432 and the docking rod 42, the output end of the first docking cylinder 432 retracts, and the second docking cylinder 433 remains in an extended connected state so that the spring can continue to move downward from the first docking cylinder 432. When the spring moves to the connection between the output end of the second docking cylinder 433 and the docking rod 42, the output end of the second docking cylinder 433 retracts, and the output end of the first docking cylinder 432 is reset and remains in an extended connected state so that the spring can continue to move downward from the second docking cylinder 433.

[0084] Afterwards, the spring moves to the placement rod 2, and then the inclination state of the reset docking rod 42 changes, so that the docking rod 42 is disconnected from the guide rod 41 and reset to a horizontal state, thereby keeping the placement rod 2 horizontal and clamped and fixed by the clamping protrusion 102, and then the docking rod 42 is disengaged from the contact with the placement rod 2 to realize the feeding of the spring.

[0085] It should be noted that after the spring feeding is completed, the docking rod 42 is separated from the contact with the placement rod 2, and the heat treatment box 1 can be closed freely, thereby avoiding affecting the use of the heat treatment box 1.

[0086] When the spring needs to be taken out, after the heat treatment box 1 is opened, the docking rod 42 is re-docking with the placement rod 2, and then the docking rod 42 changes to a left low and right high state. At this time, there is no contact between the docking rod 42 and the guide rod 41. The spring can slide from the placement rod 2 to the docking rod 42, and then slide from the left end of the docking rod 42 to be collected, thereby realizing the return of the spring.

[0087] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0088] In this embodiment, a guiding mechanism 4 is provided, which is provided between the winding structure of the spring and the placement rod 2. The spring is directly conveyed to the heat treatment box 1 after winding and forming, so as to realize fast and accurate feeding of the spring. At the same time, when the docking rod 42 changes to a left low and right high state, and there is no contact between the docking rod 42 and the guide rod 41, the spring can slide from the placement rod 2 to the docking rod 42, and then slide from the left end of the docking rod 42, so as to realize fast withdrawal of the spring, making the feeding and withdrawing operations simple during the spring heat treatment process.

[0089] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0090] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A heat treatment device for nickel-titanium alloy springs, characterized in that: include: A heat treatment box (1) is used for tempering the nickel-titanium alloy spring; A placement rod (2) for placing a nickel-titanium alloy spring; A clamping device (3) for adjusting the pitch of the nickel-titanium alloy spring; The clamping device (3) comprises a clamping bracket (301), the clamping bracket (301) being connected to a first pushing cylinder (302) and a second pushing cylinder (303), the output end of the first pushing cylinder (302) being connected to a first clamping terminal (304), and the output end of the second pushing cylinder (303) being connected to a second clamping terminal (305); The first clamping terminal (304) and the second clamping terminal (305) respectively correspond to the support rings at both ends of the nickel-titanium alloy spring. After the output ends of the first push cylinder (302) and the second push cylinder (303) are extended, the first clamping terminal (304) clamps the outer end support ring of the spring, and the second clamping terminal (305) clamps the inner end support ring of the spring. Then, the output end of the first push cylinder (302) retracts to change the length of the effective ring of the spring, thereby adjusting the pitch of the spring. When a spring is placed on the placement rod (2), the placement rod (2) is in a horizontal state, and the extension directions of the first pushing cylinder (302) and the second pushing cylinder (303) are both parallel to the placement rod (2) in the horizontal state; It also comprises a guiding mechanism (4), wherein the guiding mechanism (4) is arranged outside the heat treatment box (1); when the heat treatment box (1) is opened, the guiding mechanism (4) is connected to the placement rod (2), and facilitates the movement of the nickel-titanium alloy spring between the guiding mechanism (4) and the placement rod (2), thereby facilitating the taking and placing of the nickel-titanium alloy spring; The guide mechanism (4) comprises a guide rod (41) and a docking rod (42), one end of the guide rod (41) is connected to the output end of the winding structure of the spring, the docking rod (42) is arranged between the guide rod (41) and the placement rod (2), the first output end of the docking rod (42) is opposite to the guide rod (41), and the second output end of the docking rod (42) is opposite to the placement rod (2); Two vertical frames (101) are vertically arranged in the heat treatment box (1), the outer end of the placement rod (2) is located between the two vertical frames (101), and the inner surface of the vertical frame (101) is provided with a clamping protrusion (102). When the placement rod (2) moves to the area between the two clamping protrusions (102), the placement rod (2) is clamped and fixed by the two clamping protrusions (102), and at this time, the placement rod (2) is in a horizontal state.

2. A heat treatment device for nickel-titanium alloy springs as claimed in claim 1, characterized in that: The first clamping terminal (304) comprises a first fixing plate (3041), the first fixing plate (3041) is connected to the output end of the first pushing cylinder (302), the first fixing plate (3041) is connected to the first clamping cylinder (3042), the output end of the first clamping cylinder (3042) is connected to the first clamping seat (3043), the first clamping seat (3043) is provided with a first lifting cylinder (3044), the output end of the first lifting cylinder (3044) is vertically upward and connected to a first arc-shaped slide groove (3045), the first arc-shaped slide groove (3045) is located below the placement rod (2), and the first arc-shaped slide groove (3045) is coaxial with the spring, a first sliding seat (3046) is slidably provided in the first arc-shaped slide groove (3045), and the first sliding seat (3046) is connected to the first clamping plate (3047); The side of the first fixing plate (3041) facing the spring is the inner side, the first pushing cylinder (302) is arranged on one side of the inner side of the first fixing plate (3041), the extension direction of the first clamping cylinder (3042) is parallel to the extension direction of the first pushing cylinder (302), and the output end of the first clamping cylinder (3042) faces the first fixing plate (3041).

3. The heat treatment equipment for nickel-titanium alloy springs according to claim 1, characterized in that: The second clamping terminal (305) comprises a second fixing plate (3051), the second fixing plate (3051) is connected to the inner end of the placement rod (2), the output end of the second pushing cylinder (303) is connected to the second clamping seat (3052), the second clamping seat (3052) is provided with a second lifting cylinder (3053), the output end of the second lifting cylinder (3053) is vertically upward and connected to a second arc-shaped slide groove (3054), the second arc-shaped slide groove (3054) is located below the placement rod (2), and the second arc-shaped slide groove (3054) is coaxial with the spring, a second sliding seat (3055) is slidably provided in the second arc-shaped slide groove (3054), and the second sliding seat (3055) is connected to the second clamping plate (3056); The side of the second fixing plate (3051) facing away from the spring is the outside, the second pushing cylinder (303) is arranged on the outside side of the second fixing plate (3051), and the output end of the second pushing cylinder (303) faces the second fixing plate (3051).

4. The heat treatment equipment for nickel-titanium alloy springs according to claim 1, characterized in that: When the docking rod (42) is in a horizontal state, the second output end of the docking rod (42) extends out and connects with the placement rod (2); When the docking rod (42) is in a state where the left side is higher and the right side is lower, the first output end of the docking rod (42) is connected to the guide rod (41), and at this time the placement rod (2) is located above the clamping protrusion (102), and the spring passes through the placement rod (2) and the docking rod (42) in sequence from the winding structure and enters the placement rod (2), thereby realizing the feeding of the heat treatment process; When the docking rod (42) is in a state where the left side is lower and the right side is higher, the connection between the guide rod (41) and the docking rod (42) is disconnected, and the docking rod (42) is connected to the placement rod (2). At this time, the placement rod (2) is located below the clamping protrusion (102), and the spring slides from the placement rod (2) to the docking rod (42), and then falls off from the docking rod (42), thereby realizing the material removal during the heat treatment process.

5. The heat treatment equipment for nickel-titanium alloy springs according to claim 1, characterized in that: The two ends of the docking rod (42) are respectively provided with a first docking outer cylinder (421) and a second docking outer cylinder (422); the first docking outer cylinder (421) is provided with a first docking cylinder (423); the output end of the first docking cylinder (423) is connected to a first docking inner cylinder (424); the first docking inner cylinder (424) extends out of the first docking outer cylinder (421) and is connected to a first docking plug rod (425); the second docking outer cylinder (422) is provided with a second docking cylinder (426); the output end of the second docking cylinder (426) is connected to a second docking inner cylinder (427); the second docking inner cylinder (427) extends out of the second docking outer cylinder (422) and is connected to a second docking plug rod (428).

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