Stretching auxiliary device for spring machining

Abstract

The invention belongs to the technical field of spring processing, particularly relates to a stretching auxiliary device for spring processing, and aims to solve the technical problem that an existing stretching auxiliary device for spring processing cannot effectively ensure that the screw pitches of all circles of a spring are the same after the spring is stretched, the following scheme is provided: the stretching auxiliary device comprises a mounting plate, and a driving mechanism is arranged on one side of the mounting plate; an equidistant mechanism is fixedly arranged on the other side of the mounting plate and comprises a plurality of X-shaped equidistant assemblies, the equidistant assemblies are hinged, each equidistant assembly comprises a first adjusting rod and a second adjusting rod, and the first adjusting rod is rotationally connected with the middle of the second adjusting rod; and the equidistant mechanism is driven by the driving mechanism. Through the equidistant mechanism, the guide mechanism and the expansion mechanism, expansion blocks can be located in gaps of all circles of springs, so that the springs are stretched at equal intervals, and the situation that the production quality of the springs is affected due to different screw pitches of all circles of the springs is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of spring processing, and particularly relates to a stretching auxiliary device for spring processing. Background Art

[0002] A spring is a mechanical part that utilizes elasticity. A part made of elastic material deforms under the action of an external force and returns to its original state after the external force is removed. Also known as "spring". Generally made of spring steel. Springs are complex and diverse in types. Classified by shape, there are mainly helical springs, scroll springs, leaf springs, special-shaped springs, etc. When processing springs, a stretching auxiliary device is required to stretch the springs.

[0003] The patent application No. CN202321329478.X discloses a spring stretching device, which relates to the technical field of spring stretching, including a fixed frame. An activity plate is slidably connected inside the fixed frame, and mirror-symmetrical clamping components are arranged inside both the activity plate and the fixed frame; the clamping component includes a guide rod, an activity block, a hook and a connecting rod. Activity grooves are opened inside both the activity plate and the fixed frame. A tension spring is installed inside the activity groove. The activity block is slidably connected to the side wall of the guide rod. A communication groove is opened inside the activity groove. The connecting rod is slidably connected inside the communication groove; in the technical solution provided by this utility model, by using the clamping component, when in use, the spring is placed between the activity plate and the inside of the fixed frame. The connecting rod is toggled to drive the activity block to move so that the hook is located at the spring. Then the connecting rod is released to make the tension spring pull the activity block to clamp the spring inside the hook, thereby fixing the spring. In this way, springs of different specifications can be fixed more quickly, making the spring stretching detection more efficient and better.

[0004] However, for a stretching auxiliary device for spring processing similar to the above, when stretching the spring, due to factors such as the material, force, and quality of the spring, it is easy to cause the pitch of each turn of the spring to be different after stretching. After stretching and shaping, it is not convenient to adjust the pitch again, thus affecting the quality of the spring. Summary of the Invention

[0005] Based on the technical problem that the existing stretching auxiliary device for spring processing cannot effectively ensure that the pitch of each turn of the spring is the same after stretching, the present invention proposes a stretching auxiliary device for spring processing.

[0006] A stretching auxiliary device for spring processing proposed by the present invention includes a mounting plate. A driving mechanism is arranged on one side of the mounting plate, and an equidistant mechanism is fixedly arranged on the other side of the mounting plate. The equidistant mechanism includes multiple groups of equidistant components in an "X" shape, and multiple groups of the equidistant components are hinged to each other. The equidistant component includes a first adjusting rod and a second adjusting rod, and the middle parts of the first adjusting rod and the second adjusting rod are rotatably connected. The equidistant mechanism is driven by the driving mechanism. Multiple expansion mechanisms are arranged outside the equidistant mechanism, and the multiple expansion mechanisms correspond to multiple groups of the equidistant components. A guiding mechanism is arranged on one side of the mounting plate, and the guiding mechanism is fixedly arranged between the expansion mechanisms.

[0007] As a preferred solution of a stretching auxiliary device for spring processing according to the present invention, wherein: the driving mechanism includes a driving motor fixedly connected to one side of the mounting plate, and the output shaft of the driving motor is fixedly connected with a first threaded lead screw. A driving block is slidably arranged on the outer wall of the first threaded lead screw through threads.

[0008] As a preferred solution of a stretching auxiliary device for spring processing according to the present invention, wherein: the driving mechanism further includes a first connecting rod and a second connecting rod. One end of the first connecting rod and the second connecting rod are rotatably connected. The other ends of the first connecting rod and the second connecting rod are respectively hinged to the first adjusting rod and the second adjusting rod. The driving block is rotatably connected to the end where the first connecting rod and the second connecting rod are hinged. A connection port is opened on one side of the mounting plate, and the first connecting rod and the second connecting rod pass through the connection port.

[0009] As a preferred solution of a stretching auxiliary device for spring processing according to the present invention, wherein: the guiding mechanism includes a fixing plate fixedly connected to one side of the mounting plate. One end of the fixing plate is provided with a guiding port, and multiple guiding blocks are slidably arranged on the inner wall of the guiding port. The multiple guiding blocks are respectively rotatably connected to the hinge joints of the equidistant components.

[0010] As a preferred solution of a stretching auxiliary device for spring processing according to the present invention, wherein: the expansion mechanism includes an expansion ring. A connecting plate is fixedly arranged between the expansion ring and the guiding block. An installation cavity is arranged inside the expansion ring. A rotating ring is rotatably connected to the inner wall of the installation cavity. Multiple expansion grooves are opened on one side of the rotating ring. An expansion rod is slidably arranged on the inner wall of the expansion groove. Both ends of the expansion rod are fixedly connected with a connecting frame, and a movable plate is fixedly arranged on the top of the connecting frame. Multiple movable ports are equidistantly opened on the circumferential inner wall of the installation cavity, and the movable plate is inserted into the movable port.

[0011] As a preferred embodiment of a stretching auxiliary device for spring processing according to the present invention, wherein: a dilation block is fixedly arranged on the surface of the movable plate away from the installation cavity, and the cross-section of the dilation block is triangular.

[0012] As a preferred embodiment of a stretching auxiliary device for spring processing according to the present invention, wherein: a transmission tooth groove is formed on the inner circumferential wall of the rotating ring, two meshing first transmission gears and second transmission gears are rotatably connected to the inner wall of the installation cavity, and the first transmission gear meshes with the transmission tooth groove.

[0013] As a preferred embodiment of a stretching auxiliary device for spring processing according to the present invention, wherein: a moving port is formed on the inner circumferential wall of the installation cavity, a transmission rack is slidably arranged on the inner wall of the moving port, the transmission rack meshes with the second transmission gear, a moving groove is formed on the inner wall of the connecting plate, and the transmission rack is slidably connected in the moving groove.

[0014] As a preferred embodiment of a stretching auxiliary device for spring processing according to the present invention, wherein: an installation groove is formed at one end of the guiding block, a connecting gear is rotatably connected to the inner wall at one end of the installation groove, a connecting tooth groove meshing with the connecting gear is formed at the top of the guiding port, a second threaded lead screw is fixedly arranged at one end of the connecting gear, a slider is slidably arranged on the outer wall of the second threaded lead screw through threads, the slider is adapted to the moving groove, and two fixing rods are fixedly connected to the opposite ends of the slider and the transmission rack.

[0015] As a preferred embodiment of a stretching auxiliary device for spring processing according to the present invention, wherein: a fixing mechanism is arranged on the outer wall of the equidistant mechanism, the fixing mechanism includes a first hook fixedly connected to one end of the fixing plate, the two ends of the equidistant component away from the installation plate are respectively rotatably connected to a third connecting rod and a fourth connecting rod, the third connecting rod and the fourth connecting rod are rotatably connected to each other at the ends close to each other, and an installation block is rotatably connected to the ends of the third connecting rod and the fourth connecting rod close to each other, and a second hook is fixedly arranged on one side of the installation block.

[0016] Compared with the prior art, the present invention provides a stretching auxiliary device for spring processing, which has the following beneficial effects:

[0017] 1. When stretching the spring with this stretching auxiliary device for spring processing, the spring is sleeved outside the equidistant mechanism and the guiding mechanism. The two ends of the spring are fixed by the first hook and the second hook of the fixing mechanism. Then, the driving motor is started. The driving motor drives the first threaded screw rod to rotate, thereby driving the driving block to move. The driving block drives the first connecting rod and the second connecting rod to move. Then, the first adjusting rod and the second adjusting rod that are hinged to each other drive the spring to stretch. During the stretching process of the spring, the hinged part of the first adjusting rod and the second adjusting rod, that is, the intersection of the "X"-shaped equidistant assembly, moves equidistantly, making the intersection of the equidistant assembly correspond to the spacing between each turn of the spring. Then, the expanding mechanism extends outwards, and the expanding block is located at the gap between each turn of the spring, so that the spring is stretched equidistantly, avoiding different pitches of each turn of the spring from affecting the production quality of the spring.

[0018] 2. With this stretching auxiliary device for spring processing, through the guiding block and the guiding opening, the intersection of the equidistant assembly can be guided, effectively avoiding the inclination of the equidistant mechanism during the stretching process, and further ensuring that each turn of the spring has the same pitch during the stretching process.

[0019] 3. When this stretching auxiliary device for spring processing is stretching, the guiding block moves in the guiding opening, thereby driving the expanding ring to move through the connecting plate, driving the connecting gear to rotate through the connecting tooth grooves, and then driving the second threaded screw rod to rotate. The slider is limited by the moving groove, thereby driving the transmission rack to move. During the movement of the transmission rack, the second transmission gear is driven to rotate, and then the rotating ring is driven to rotate through the first transmission gear. During the rotation of the rotating ring, the expanding rod is driven to move through the expanding groove. Since the expanding groove is inclined, the movable plate and the expanding block are driven to move outwards through the connecting frame, and then the expanding block with a triangular cross-section is squeezed into the gap between each turn of the spring, ensuring that each turn of the spring has the same pitch. After the stretching is completed, the equidistant mechanism can be driven to reset by the driving mechanism to drive the expanding block to reset. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a stretching auxiliary device for spring processing proposed by the present invention from the first perspective;

[0021] Figure 2 It is a schematic structural diagram of a stretching auxiliary device for spring processing proposed by the present invention from the second perspective;

[0022] Figure 3 It is a partial three-dimensional structural diagram of the first connecting rod and the second connecting rod of a stretching auxiliary device for spring processing proposed by the present invention;

[0023] Figure 4 It is a schematic structural diagram of the equidistant mechanism of a stretching auxiliary device for spring processing proposed by the present invention;

[0024] Figure 5 This is a partial three-dimensional structural schematic diagram of the guiding mechanism of a stretching auxiliary device for spring processing proposed by the present invention;

[0025] Figure 6 This is a structural schematic diagram of an expanding mechanism of a stretching auxiliary device for spring processing proposed by the present invention;

[0026] Figure 7 This is a partial side sectional structural schematic diagram of an expanding mechanism of a stretching auxiliary device for spring processing proposed by the present invention;

[0027] Figure 8 This is a partial front sectional structural schematic diagram of an expanding mechanism of a stretching auxiliary device for spring processing proposed by the present invention;

[0028] Figure 9 This is a side sectional structural schematic diagram of a transmission rack of a stretching auxiliary device for spring processing proposed by the present invention;

[0029] Figure 10 This is a partial front sectional structural schematic diagram of a connecting gear and a connecting tooth groove of a stretching auxiliary device for spring processing proposed by the present invention.

[0030] In the figure: 1, mounting plate; 2, driving mechanism; 201, driving motor; 202, first threaded lead screw; 203, driving block; 204, first connecting rod; 205, second connecting rod; 3, expanding mechanism; 301, expanding ring; 302, connecting plate; 303, expanding block; 304, mounting cavity; 305, rotating ring; 306, movable opening; 307, movable plate; 308, expanding groove; 309, expanding rod; 310, transmission tooth groove; 311, first transmission gear; 312, second transmission gear; 313, moving opening; 314, transmission rack; 315, moving groove; 316, second threaded lead screw; 317, connecting gear; 318, mounting groove; 319, fixing rod; 320, slider; 321, connecting tooth groove; 322, connecting frame; 4, equidistant mechanism; 401, first adjusting rod; 402, second adjusting rod; 5, guiding mechanism; 501, fixing plate; 502, guiding opening; 503, guiding block; 6, fixing mechanism; 601, first hook; 602, second hook; 603, third connecting rod; 604, fourth connecting rod; 605, mounting block; 7, connecting port. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0033] Referring to Figures 1 - 5 , a stretching auxiliary device for spring processing, including a mounting plate 1, a driving mechanism 2 is arranged on one side of the mounting plate 1, an equidistant mechanism 4 is fixedly arranged on the other side of the mounting plate 1, the equidistant mechanism 4 includes multiple groups of equidistant components in an "X" shape, multiple groups of equidistant components are hinged to each other, the equidistant component includes a first adjusting rod 401 and a second adjusting rod 402, the middle parts of the first adjusting rod 401 and the second adjusting rod 402 are rotatably connected, the equidistant mechanism 4 is driven by the driving mechanism 2, multiple expanding mechanisms 3 are arranged outside the equidistant mechanism 4, the multiple expanding mechanisms 3 correspond to multiple groups of equidistant components, a guiding mechanism 5 is arranged on one side of the mounting plate 1, and the guiding mechanism 5 is fixedly arranged between the expanding mechanisms 3.

[0034] Referring to Figure 1 and Figure 2 , the driving mechanism 2 includes a driving motor 201 fixedly connected to one side of the mounting plate 1, the output shaft of the driving motor 201 is fixedly connected with a first threaded lead screw 202, a driving block 203 is slidably arranged on the outer wall of the first threaded lead screw 202 through threads, the first threaded lead screw 202 can be driven by the driving motor 201 to rotate, thereby driving the driving block 203 to move; the driving mechanism 2 further includes a first connecting rod 204 and a second connecting rod 205, one ends of the first connecting rod 204 and the second connecting rod 205 are rotatably connected, the other ends of the first connecting rod 204 and the second connecting rod 205 are respectively hinged to the first adjusting rod 401 and the second adjusting rod 402, the driving block 203 is rotatably connected to the end where the first connecting rod 204 and the second connecting rod 205 are hinged, a connection port 7 is opened on one side of the mounting plate 1, the first connecting rod 204 and the second connecting rod 205 pass through the connection port 7, and the driving block 203 drives the first connecting rod 204 and the second connecting rod 205 to move, thereby driving multiple groups of equidistant components to perform equidistant stretching.

[0035] Referring to Figure 3 and Figure 5 , the guiding mechanism 5 includes a fixing plate 501 fixedly connected to one side of the mounting plate 1, a guiding port 502 is opened at one end of the fixing plate 501, multiple guiding blocks 503 are slidably arranged on the inner wall of the guiding port 502, and the multiple guiding blocks 503 are respectively rotatably connected to the hinge joints of the equidistant components. Through the guiding blocks 503 and the guiding port 502, it effectively avoids the equidistant mechanism 4 from tilting during the stretching process.

[0036] Referring to Figures 6 - 10 , the expansion mechanism 3 includes an expansion ring 301. A connecting plate 302 is fixedly arranged between the expansion ring 301 and the guide block 503. An installation cavity 304 is arranged inside the expansion ring 301. A rotating ring 305 is rotatably connected to the inner wall of the installation cavity 304. A plurality of expansion grooves 308 are formed on one side of the rotating ring 305. An expansion rod 309 is slidably arranged on the inner wall of the expansion groove 308. Both ends of the expansion rod 309 are fixedly connected with connecting frames 322. A movable plate 307 is fixedly arranged at the top of the connecting frame 322. Movable openings 306 are equidistantly formed on the circumferential inner wall of the installation cavity 304. The movable plate 307 is inserted into the movable opening 306. The expansion groove 308 is inclined. Thus, through the expansion groove 308, during the rotation of the rotating ring 305, the movable plate 307 can be driven to move outwards; on the side of the movable plate 307 away from the installation cavity 304, an expansion block 303 is fixedly arranged. The cross-section of the expansion block 303 is triangular. The cross-section of the expansion block 303 is triangular, and the inclined surface of the expansion block 303 has a certain radian, which can adapt to the distance between each turn of the spring and can effectively fit the surface of the spring; a transmission tooth groove 310 is formed on the circumferential inner wall of the rotating ring 305. Two meshing first transmission gears 311 and second transmission gears 312 are rotatably connected to the inner wall of the installation cavity 304. The first transmission gear 311 meshes with the transmission tooth groove 310. By driving the first transmission gear 311 to rotate through the second transmission gear 312, the first transmission gear 311 drives the rotating ring 301 to rotate through the transmission tooth groove 310; a moving opening 313 is formed on the circumferential inner wall of the installation cavity 304. A transmission rack 314 is slidably arranged on the inner wall of the moving opening 313. The transmission rack 314 meshes with the second transmission gear 312. A moving groove 315 is formed on the inner wall of the connecting plate 302. The transmission rack 314 is slidably connected in the moving groove 315. The second transmission gear 312 can be driven to rotate through the transmission rack 314; an installation groove 318 is formed at one end of the guide block 503. A connecting gear 317 is rotatably connected to the inner wall of one end of the installation groove 318. A connecting tooth groove 321 meshing with the connecting gear 317 is formed at the top of the guide opening 502. A second threaded rod 316 is fixedly arranged at one end of the connecting gear 317. A slider 320 is slidably arranged on the outer wall of the second threaded rod 316 through a thread. The slider 320 is adapted to the moving groove 315. Two fixing rods 319 are fixedly connected to the opposite ends of the slider 320 and the transmission rack 314. The slider 320 can be driven to move through the second threaded rod 316, and then the transmission rack 314 can be driven to move, driving the second transmission gear 312 to rotate. And during the movement of the guide block 503, the connecting gear 317 can be driven to rotate through the connecting tooth groove 321, thereby driving the second threaded rod 316 to rotate.

[0037] Referring to Figure 4, a fixing mechanism 6 is provided on the outer wall of the equidistant mechanism 4. The fixing mechanism 6 includes a first hook 601 fixedly connected to one end of the fixing plate 501. The two ends of the equidistant component away from the mounting plate 1 are respectively rotatably connected to a third connecting rod 603 and a fourth connecting rod 604. The ends of the third connecting rod 603 and the fourth connecting rod 604 close to each other are rotatably connected, and a mounting block 605 is rotatably connected to the ends of the third connecting rod 603 and the fourth connecting rod 604 close to each other. A second hook 602 is fixedly arranged on one side of the mounting block 605. One end of the spring is fixed by the first hook 601, and the other end of the spring is fixed by the second hook 602. And the second hook 602 moves during the stretching process of the equidistant mechanism 4, driving the spring to be stretched synchronously.

[0038] Working principle: When stretching the spring, the spring is sleeved outside the equidistant mechanism 4 and the guiding mechanism 5. The two ends of the spring are fixed by the first hook 601 and the second hook 602 of the fixing mechanism 6. Then the driving motor 201 is started. The driving motor 201 drives the first threaded rod 202 to rotate, thereby driving the driving block 203 to move. The driving block 203 drives the first connecting rod 204 and the second connecting rod 205 to move, and then drives the spring to be stretched through the mutually hinged first adjusting rod 401 and second adjusting rod 402. During the stretching process of the spring, the hinged part of the first adjusting rod 401 and the second adjusting rod 402, that is, the intersection of the "X"-shaped equidistant component, moves equidistantly, making the intersection of the equidistant component correspond to the spacing between each turn of the spring. At the same time, the guiding block 503 moves in the guiding port 502, and then drives the expansion ring 305 to move through the connecting plate 302. The connecting gear 317 is driven to rotate through the connecting tooth groove 321, and then drives the second threaded rod 316 to rotate. The slider 320 is limited by the moving groove 315, thereby driving the transmission rack 314 to move. During the movement of the transmission rack 314, the second transmission gear 312 is driven to rotate, and then the rotating ring 305 is driven to rotate through the first transmission gear 311. During the rotation of the rotating ring 305, the expansion rod 309 is driven to move through the expansion groove 308. Since the expansion groove 308 is inclined, the movable plate 307 and the expansion block 303 are driven to move outward through the connecting frame 322, and then the expansion block 303 with a triangular cross-section is squeezed into the spacing between each turn of the spring to ensure that the pitch of each turn of the spring is the same. After the stretching is completed, the equidistant mechanism 4 is driven to reset by the driving mechanism 2 to drive the expansion block 303 to reset.

[0039] The control mode of the present invention is controlled by a controller. The control circuit of the controller can be realized by simple programming of those skilled in the art. The provision of power also belongs to the common knowledge in the art, and the present invention mainly protects mechanical devices, so the control mode and circuit connection of the present invention will not be explained in detail.

[0040] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A stretching auxiliary device for spring processing, comprising a mounting plate (1), characterized in that, On one side of the mounting plate (1), a driving mechanism (2) is provided. On the other side of the mounting plate (1), an equidistant mechanism (4) is fixedly arranged. The equidistant mechanism (4) includes multiple groups of equidistant components in an "X" shape. Multiple groups of the equidistant components are hinged to each other. The equidistant component includes a first adjusting rod (401) and a second adjusting rod (402). The middle parts of the first adjusting rod (401) and the second adjusting rod (402) are rotationally connected. The equidistant mechanism (4) is driven by the driving mechanism (2). Multiple expansion mechanisms (3) are arranged outside the equidistant mechanism (4). The multiple expansion mechanisms (3) correspond to multiple groups of the equidistant components. On one side of the mounting plate (1), a guiding mechanism (5) is provided. The guiding mechanism (5) is fixedly arranged with the expansion mechanism (3).

2. The stretching auxiliary device for spring processing according to claim 1, wherein, The driving mechanism (2) includes a driving motor (201) fixedly connected to one side of the mounting plate (1). The output shaft of the driving motor (201) is fixedly connected with a first threaded rod (202). A driving block (203) is slidably arranged on the outer wall of the first threaded rod (202) through threads.

3. The stretching auxiliary device for spring processing according to claim 2, characterized in that, The driving mechanism (2) further includes a first connecting rod (204) and a second connecting rod (205). One end of the first connecting rod (204) and the second connecting rod (205) is rotationally connected. The other ends of the first connecting rod (204) and the second connecting rod (205) are respectively hinged to the first adjusting rod (401) and the second adjusting rod (402). The driving block (203) is rotationally connected to the end where the first connecting rod (204) and the second connecting rod (205) are hinged. A connection port (7) is opened on one side of the mounting plate (1). The first connecting rod (204) and the second connecting rod (205) pass through the connection port (7).

4. The stretching auxiliary device for spring processing according to claim 3, characterized in that, The guiding mechanism (5) includes a fixing plate (501) fixedly connected to one side of the mounting plate (1). One end of the fixing plate (501) is provided with a guiding port (502). Multiple guiding blocks (503) are slidably arranged on the inner wall of the guiding port (502). The multiple guiding blocks (503) are respectively rotationally connected to the hinge points of the equidistant components.

5. The stretching auxiliary device for spring processing according to claim 4, characterized in that, The expansion mechanism (3) includes an expansion ring (301). A connecting plate (302) is fixedly arranged between the expansion ring (301) and the guiding block (503). An installation cavity (304) is arranged inside the expansion ring (301). A rotating ring (305) is rotationally connected to the inner wall of the installation cavity (304). Multiple expansion slots (308) are opened on one side of the rotating ring (305). An expansion rod (309) is slidably arranged on the inner wall of the expansion slot (308). Both ends of the expansion rod (309) are fixedly connected with a connecting frame (322). A movable plate (307) is fixedly arranged at the top of the connecting frame (322). Multiple movable ports (306) are equidistantly opened on the circumferential inner wall of the installation cavity (304). The movable plate (307) is inserted into the movable port (306).

6. The stretching auxiliary device for spring processing according to claim 5, characterized in that, One side of the movable plate (307) away from the installation cavity (304) is fixedly provided with an expansion block (303), and the cross-section of the expansion block (303) is triangular.

7. The stretching auxiliary device for spring processing according to claim 6, wherein, The inner circumferential wall of the rotating ring (305) is provided with a transmission tooth groove (310). The inner wall of the installation cavity (304) is rotatably connected with two meshing first transmission gears (311) and second transmission gears (312), and the first transmission gear (311) meshes with the transmission tooth groove (310).

8. An auxiliary stretching device for spring processing according to claim 7, characterized in that, A moving port (313) is provided on the inner circumferential wall of the installation cavity (304). A transmission rack (314) is slidably arranged on the inner wall of the moving port (313). The transmission rack (314) meshes with the second transmission gear (312). A moving groove (315) is provided on the inner wall of the connecting plate (302), and the transmission rack (314) is slidably connected in the moving groove (315).

9. The stretching auxiliary device for spring processing according to claim 8, characterized in that, One end of the guiding block (503) is provided with an installation groove (318). The inner wall of one end of the installation groove (318) is rotatably connected with a connecting gear (317). A connecting tooth groove (321) meshing with the connecting gear (317) is provided at the top of the guiding port (502). One end of the connecting gear (317) is fixedly provided with a second threaded rod (316). A slider (320) is slidably arranged on the outer wall of the second threaded rod (316) through a thread. The slider (320) is adapted to the moving groove (315). Two fixing rods (319) are fixedly connected to the opposite ends of the slider (320) and the transmission rack (314).

10. The stretching auxiliary device for spring processing according to claim 9, wherein, A fixing mechanism (6) is arranged on the outer wall of the equal-spacing mechanism (4). The fixing mechanism (6) includes a first hook (601) fixedly connected to one end of the fixing plate (501). The two ends of the equal-spacing component away from the installation plate (1) are respectively rotatably connected with a third connecting rod (603) and a fourth connecting rod (604). The third connecting rod (603) and the fourth connecting rod (604) are rotatably connected to each other at the ends close to each other. An installation block (605) is rotatably connected to the ends of the third connecting rod (603) and the fourth connecting rod (604) close to each other. A second hook (602) is fixedly arranged on one side of the installation block (605).

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