Winding method of compression spring

Abstract

The invention discloses a winding method of a compression spring, and belongs to the field of machine manufacturing. The method is realized based on a numerical control spring winding machine and comprises the steps of initial positioning, steel wire leading-in, main body winding and cutting forming. The method is converted into a numerical control program in a spring winding machine, automatic production of the compression spring can be achieved, and the method is suitable for large-batch production. The computer control system is mainly composed of a control panel and a sensor, and manufacturing of the spring is completed by setting a spring winding program, controlling the mandrel to rotate and controlling the motor connecting rod system. According to the method, the winding process of spring winding is greatly simplified, key control parameters are extracted, and a method for combining an automatic numerical control program and adapting to winding of compression springs with different parameter requirements by accurately controlling specific parameters is introduced, so that the numerical control program is rapidly adjusted, and the production changing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing technology, and specifically to a method for winding a compression spring. Background Technology

[0002] A spring is a mechanical component that stores and releases energy through deformation by utilizing the elasticity and structural characteristics of a material. A compression spring is a helical spring that withstands pressure. It is typically made of circular material with a uniform pitch and a certain gap between the coils. When subjected to an external load, the spring contracts and deforms. Compression springs are widely used in mechanical equipment in fields such as machinery, automobiles, and aerospace, including shock absorbers, clamping tools, and force measuring tools. Their performance is highly dependent on geometric precision (such as mean diameter, pitch, and number of coils). Traditional compression spring production relies on manual operation. Workers adjust equipment parameters based on experience, and then manually wind the springs. This production mode has low changeover efficiency, and manual operation easily leads to problems such as inconsistent spring outer diameter and free height. In the absence of widespread automation, manual equipment adjustment remains the primary method. With increasing production demands, traditional methods are gradually becoming unable to meet the requirements of large-scale, high-precision production.

[0003] Existing technologies mostly rely on semi-automatic or manually operated spring winding machines. Although some have CNC systems, the lack of standardized workflows and winding methods necessitates significant time for manual adjustments. These machines lack high adaptability and have low changeover efficiency, thus failing to achieve truly high-efficiency production. The basic operating procedure of existing technologies is as follows: workers manually set initial parameters → step-by-step manipulation of handwheels to control tool position → prototype production and measurement → repeated parameter correction until standards are met → mass production.

[0004] The disadvantages of the existing technology are as follows: (1) Low production efficiency, requiring workers to repeatedly debug the equipment, which takes a lot of time, especially when changing production, workers need to readjust the equipment one by one; (2) High production cost, relying on highly skilled workers, and the waste rate of materials in the trial production stage is relatively high; (3) Inconsistent product quality, manual adjustment will cause the quality of springs in different batches to fluctuate, making it difficult to ensure the consistency of dimensions; (4) Difficulty in large-scale production, traditional methods cannot adapt to the requirements of large-scale production, especially when the types of springs are complex and the demand changes frequently, manual operation cannot guarantee high efficiency and high quality during continuous production.

[0005] Currently, other approaches and methods exist for manufacturing compression springs, such as using industrial robots with six-axis robotic arms to hold steel wires and shape them in space, but these methods are costly. Another approach involves using metal additive manufacturing to directly print springs, but this is also expensive and only suitable for customized small-batch production. In the future, introducing artificial intelligence technology can allow for real-time adjustments and optimization of the production process, achieving greater automation and flexibility, but this is difficult and costly to implement. Although Chinese invention patent CN104487186B discloses a method and apparatus for manufacturing helical springs through spring winding, using a digitally controlled spring winding machine, its CNC program is not universal and cannot achieve large-scale continuous production. Summary of the Invention

[0006] The purpose of this invention is to transform the process of winding compression springs into a reusable CNC program, realize automated program control of tool coordination, ensure consistency of continuous production after a single setting, achieve high-precision and high-efficiency spring winding, avoid errors from manual operation, and improve the consistency of product quality.

[0007] The technical solution of this invention: a method for winding a compression spring, based on a CNC spring winding machine, includes the following steps: Step 1: Initial positioning, adjust the positions of the rotating core Z, the first auxiliary knife, the second auxiliary knife, and the curve gauge according to the pre-prepared compression spring dimensions; Step 2: Wire introduction, convey the wire to the near end of the lower half of the Z-shaped core, control the pitch cutter to move forward so that the wire is raised and contacts the Z-plane of the core, convey the wire a second time so that it is stably overlapped on the Z-plane of the core, and the pitch cutter retracts to the interference-free position for the first time. Step 3: Main body winding. Quantitatively feed steel wire to complete the first tight winding. Move the pitch cutter forward to the preset pitch control position. Continuously feed steel wire according to the preset number of turns to wind the spring body. The pitch cutter retracts to the non-interference position. Quantitatively feed steel wire to complete the last tight winding. The pitch cutter returns to the origin. Step 4: Cutting and shaping, quantitatively feeding steel wire to form a pre-cutting section, raising the cutter to the cutting height to separate the steel wire, and then resetting the cutter to the origin.

[0008] Furthermore, CNC spring winding machines include Alignment system: includes wire feed roller and guide plate, the wire feed roller is named wire feed Y; Mandrel system: includes a rotating mandrel, named Rotating Mandrel Z, which completes winding by rotating in conjunction with the cutting tool; Motor linkage system: includes cams ×1 to ×8, each cam is equipped with a dedicated cutting tool; The computer control system consists of a control panel and sensors. By setting the spring winding program, it controls the mandrel system and motor linkage system to complete the spring manufacturing process.

[0009] Furthermore, the cutting tool includes Curve gauge: Used for the bending and deformation of springs, mounted on cam ×1; Cutter: Used to cut the spring, mounted on cam ×5; Pitch cutter: Used to control the spring pitch, mounted on cam ×6; First auxiliary tool: Used in conjunction with the curve gauge to assist in spring forming and control the average mean diameter of the spring, mounted on cam ×7; Second auxiliary blade: used to fix the first auxiliary blade and prevent its head from tilting up, mounted on cam ×8.

[0010] Further, step 1 specifically involves adjusting the rotating core Z to a preset tight winding angle, moving the first auxiliary knife laterally to the overtravel position directly below the steel wire, driving the second auxiliary knife to abut against the first auxiliary knife to achieve positioning, adjusting the longitudinal position of the curve gauge based on the average middle diameter of the spring, locking the spatial position of the rotating core Z and cams ×1, ×7 and ×8, and obtaining the corresponding coordinate line program value through the spatial position.

[0011] Furthermore, in step 1, the specific coordinate line program values ​​for the core Z-axis, the first auxiliary tool, the second auxiliary tool, and the curve gauge are as follows: Rotation Z: The coordinate line program value depends on the relative angle of rotation Z after reaching the preset position; Second auxiliary tool: The coordinate line program value depends on the relative distance of cam ×8 after reaching the preset position; First auxiliary tool: The coordinate line program value depends on the relative distance of cam ×7 after reaching the preset position; Curve gauge: The value of the coordinate line program depends on the average mean diameter D of the spring, that is, when the distance between the groove of the curve gauge and the Z plane of the rotating core is D / 2, the relative distance of cam ×1 is (180~182) - D / 2.

[0012] Furthermore, in step 2, The steel wire is delivered to the rotating core Z for the first time. At this time, the value of the rotating core Z corresponding to the first line of the program depends on the absolute distance of the wire feed Y when the corresponding action is completed. The pitch tool moves, and the value of the pitch tool corresponding to the second line of the program depends on the relative distance of cam ×6 when the corresponding action is completed; The steel wire rests on the rotating core Z. At this time, the value of the rotating core Z corresponding to the third line of the program depends on the absolute distance of the wire feed Y when the corresponding action is completed. When the pitch tool retracts, the value of the pitch tool corresponding to the 4th line of the program depends on the relative distance of cam ×6 when the corresponding action is completed. This value is less than or equal to the value corresponding to the 2nd line of the pitch tool program.

[0013] Furthermore, in step 3, When the first round of tight winding is used to transport the steel wire, the value of the wire feed Y corresponding to the 5th line of the program depends on the average mean diameter D of the spring, that is, the absolute distance of the wire feed Y when the spring is tightly wound for one round. This value = 10 / (3π)*π*D = (10 / 3)*D≈3.33D; The pitch of the control spring for the forward movement of the pitch cutter, corresponding to the value in line 5 of the program, depends on the spring pitch t, ​​that is, the relative distance between cam × 6 when the corresponding action is completed. This value = the value corresponding to line 2 of the program + (0.5~1.0)*t; The steel wire is fed to wind the spring body. The value of the wire feed Y corresponding to the 6th line of the program depends on the effective number of turns Na of the spring, that is, the absolute distance of the wire feed Y when the corresponding action is completed. This value = 10 / (3π)*π*D*(Na-1) = (10 / 3)*D*(Na-1)≈3.33D*(Na-1); When the last turn is tightly wound and the pitch cutter retracts to the non-interference position, the value of the feed line Y corresponding to the 7th line of the program depends on the average mean diameter D of the spring, that is, the absolute distance of the feed line Y when the spring is tightly wound for one turn. This value = 10 / (3π)*π*D = (10 / 3)*D≈3.33D; The value corresponding to line 7 of the pitch tool program is the relative distance of cam ×6 when the corresponding action is completed. This value is less than or equal to the value corresponding to line 2 of the pitch tool program program. The pitch tool retracts to its origin, and the value of the pitch tool corresponding to line 8 of the program is 0.0.

[0014] Furthermore, in step 4, For wire conveying, the value of the feed line Y corresponding to line 9 of the program is the absolute distance of feed line Y when it is tightly wound half a turn. This value = 1 / 2 * 3.33D = 1.665D. Cutting, the value of the cutter corresponding to line 10 of the program depends on the relative distance of cam ×5 when the corresponding action is completed; The cutter returns to its origin, corresponding to a value of 0.0 in line 11 of the program.

[0015] Furthermore, the computer control system achieves operation control in the following ways: Manual mode activation: Activate F6 in the manual operation interface to enter single-axis independent control mode; Actuator control: In manual mode, select the control channel corresponding to the target actuator, and drive the actuator to move through the axial input device; Automatic production start: After the CNC program is completed, the automatic execution command F8 is triggered to call the stored CNC program to control the continuous production of the spring winding machine.

[0016] The beneficial effects of this invention are: (1) Standardized winding method: The standardized programming idea provided by this invention extracts the key control points. During programming, operators do not need to repeatedly adjust parameters. At the same time, this idea and method can be applied to the winding of compression springs with different parameter requirements and eliminates the dependence on manual experience.

[0017] (2) Efficient winding process: The method proposed in this invention simplifies the winding process of compression springs, the winding idea is clear, the coordinated action of multiple tools is reduced, and the CNC programming is more convenient and the CNC program is more concise.

[0018] (3) Improved production changeover efficiency: The prepared CNC program can be reused. The compression spring required for each parameter only needs to be adjusted once. When changing production, the CNC program can be directly called without re-adjustment. This advantage is particularly obvious in large-volume, fast-paced production.

[0019] (4) High precision and consistency: Through precise program control, this invention avoids fluctuations in various parameters of the spring caused by human operation factors, thus ensuring the consistency of product quality. Attached Figure Description

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

[0021] Figure 1 This is a schematic diagram of a compression spring; Figure 2 This is the CNC winding program table for the compression spring in Example 1. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0023] This invention proposes an automated compression spring winding method. The method introduces a specific approach to efficiently winding compression springs and transforms it into the logic of a CNC program. Using a CNC spring winding machine, automated, high-efficiency, and high-precision compression spring production can be achieved, significantly improving production efficiency, reducing human error, and ensuring consistent product quality. The technical problem this invention aims to solve is as follows: (1) Eliminate dependence on manual experience: This invention proposes a simple, efficient and standardized approach and method for winding compression springs. According to this approach, the corresponding CNC program can be adjusted according to actual needs. It is applicable to winding compression springs with different parameter requirements and does not require special training for skilled workers. (2) Reduced operational complexity: The present invention simplifies the winding process, makes the winding idea clear, reduces the coordinated action of multiple tools, and makes CNC programming more convenient and CNC programs more concise. (3) Improved production changeover efficiency: The standardized programming approach provided by this invention extracts key control points, eliminating the need for operators to repeatedly adjust parameters during programming. Furthermore, the compiled CNC program can be reused; the compression spring required for each parameter only needs to be adjusted once, and the CNC program can be directly called during production changeover without the need for re-adjustment. (4) Ensure product consistency: Compared with manual machine tool winding method, the present invention avoids the fluctuation of various parameters such as spring mean diameter, pitch and free height due to human operation factors, and can ensure the consistency of product quality; (5) Supports mass production: Compared with manual machine tool winding method, the present invention can break through the capacity of manual operation, realize the continuous automated production of springs, and avoid the risk of product quality fluctuation caused by fatigue operation.

[0024] This invention proposes a method for winding compression springs based on a CNC spring winding machine, and transforms this method into a CNC program for the winding machine, enabling automated production of compression springs suitable for mass production. This method is also applicable to similar CNC spring winding equipment. The CNC spring winding machine mainly consists of a straightening system, a mandrel system, a motor linkage system, and a computer control system. The straightening system mainly consists of a wire feeding wheel and a wire guide plate. The wire feeding wheel, named Wire Feeding Y, works to straighten and feed the steel wire. The mandrel system includes a rotating mandrel, named Rotating Mandrel Z. The steel wire is fed from the mandrel, and through the rotation of the mandrel and the use of the cutting tool, a spring sample is made. The motor linkage system consists of eight cams, named sequentially in a clockwise direction as Cam ×1, Cam ×2, Cam ×3, Cam ×4, Cam ×5, Cam ×6, Cam ×7, and Cam ×8. Cam ×1 through Cam ×8 represent the numbers of the robotic arms on the spring winding machine. Figure 2 The numbers on the program table are shown. Corresponding cutting tools are installed on each cam; the computer control system mainly consists of a control panel and sensors. It controls the rotation of the mandrel and the motor linkage system to complete the spring fabrication by setting the spring winding program.

[0025] Example 1: Production Figure 1 The compression spring has the following parameters: helix direction: right-handed, effective number of coils Na=8.5, total number of coils N1=10.5, pitch t=3mm, average mean diameter D=6mm. Figure 2The specific preparation method for the corresponding CNC winding program is as follows: Tool Preparation and Installation: The required tools include a curve gauge, a cutting tool, a pitch tool, a first auxiliary tool, and a second auxiliary tool. The curve gauge is used for spring bending and deformation and is mounted on cam ×1; the cutting tool is used to cut the spring and is mounted on cam ×5; the pitch tool is used to control the spring pitch and is mounted on cam ×6; the first auxiliary tool, in conjunction with the curve gauge, assists in spring shaping and controls the average mean diameter of the spring, and is mounted on cam ×7; the second auxiliary tool is used to fix the first auxiliary tool and prevent its head from tilting up, and is mounted on cam ×8.

[0026] Step 1: Start the program and press the F6 key to enter manual mode. In manual mode, turning the handwheel controls the movement of the corresponding column, and the program confirms the corresponding column. The program values ​​represent the relative positions of each cam, as detailed below: ① Rotate the rotating core to a suitable angle so that it can be tightly wound, and obtain the corresponding coordinate line program. The value of the corresponding coordinate line program is 3.3; ② Move the first auxiliary blade to the right, directly below the wire, slightly beyond the wire, and obtain the value of 126.6 for the corresponding coordinate line program by the relative distance of cam ×7; ③ Press the second auxiliary tool against the first auxiliary tool so that it just contacts the first auxiliary tool, and obtain the value of 95.1 for the corresponding coordinate line program by the relative distance of cam ×8; ④ Move the curve gauge down to a suitable position. The corresponding coordinate line program value is 178.5. The value of this line program depends on the average mean diameter of the spring, that is, when the distance between the groove of the curve gauge and the Z plane of the rotating core is 3mm, the relative distance of cam ×1 is 181.5 - 6 / 2. This value = (180~182) - D / 2, that is, 178.5 = 181.5 - 6 / 2. ⑤ Fix cam ×1, cam ×7, cam ×8, and rotating core Z by clicking the corresponding vertical column with the mouse to make it gray.

[0027] Step 2: Inserting the steel wire ① Send the steel wire to a suitable position, close to the lower half of the Z-shaped core. At this time, the value corresponding to the first line of the program is 4.50, obtained by the absolute distance of the wire Y. ② Move the pitch cutter until it just feeds the wire onto the plane of the rotating core Z, that is, the wire is just above the plane of the rotating core Z. At this time, the value corresponding to the second line of the program is 109.0 obtained by the relative distance of cam ×6.

[0028] ③ Send the steel wire to the Z-plane of the rotating core. The steel wire can be placed on the Z-plane of the rotating core. At this time, the value of 2.00 corresponding to the third line of the program is obtained by the absolute distance of the wire Y. ④ Retract the pitch cutter a certain distance, which is less than the relative distance of the pitch cutter in step ② of step 2, i.e. ≤109.0, so that it will not hinder the spring winding, and obtain the value of 106.8 in the fourth line of the program.

[0029] Step 3: Main body winding, ① Send the steel wire to a certain length so that it completes one round of tight winding. The value of the wire Y corresponding to the 5th line of the program depends on the average mean diameter D of the spring, that is, the absolute distance of the wire Y when the spring is completed one round of tight winding. This value = 10 / (3π)*π*D=(10 / 3) *D≈20, and the value of the corresponding 5th line of the program is 20.00. ② Move the pitch cutter forward a certain distance and control the spring pitch. The value corresponding to the 5th line of the program depends on the spring pitch t, ​​that is, the relative distance of cam ×6 when the corresponding action is completed. This value = the value corresponding to the 2nd line of the program + (0.5~1.0) * t; the value corresponding to the 5th line of the program is obtained as 111.0. ③ Send the steel wire to a certain length and start winding the spring. This step controls the number of turns of the spring. The value of the wire Y corresponding to the 6th line of the program depends on the effective number of turns Na of the spring, that is, the absolute distance of the wire Y when the corresponding action is completed. This value = 10 / (3π)*π*D*(Na-1) = (10 / 3) *D*(Na-1)≈3.33D*(Na-1)). At this time, the value of the 6th line of the program is 150.00. ④ Retract the pitch cutter a certain distance so that it does not obstruct the spring winding, corresponding to the value of 106.8 in line 7 of the program; feed the wire to a certain length so that it completes one round of tight winding. At this time, the value of the wire feed Y corresponding to line 7 of the program depends on the average mean diameter D of the spring, that is, the absolute distance of the wire feed Y when the spring is completed in one round of tight winding. This value = 10 / (3π)*π*D = (10 / 3)*D≈3.33D, corresponding to the value of 20.00 in line 7 of the program; ⑤ Retract the pitch cutter back to the origin, corresponding to a value of 0.0 in line 8 of the program.

[0030] Step 4: ① Feed the wire to a certain length so that there is a half-turn tightly wound part at the bottom of the spring that can be cut. When the corresponding action is completed, the absolute distance of the wire Y is 1 / 2 * 3.33D = 1.665D. At this time, the value corresponding to the 9th line of the program is 10.00. Raise the cutter to a certain distance so that it can cut the wire. When the corresponding action is completed, the relative distance of cam ×5 corresponds to the value of 91.1 in the program on line 10. The cutter returns to its origin, corresponding to a value of 0.0 in line 11 of the program.

[0031] At this point, the winding of a compression spring and the compilation of the CNC program are complete. Press the "F8 Execute" key to start production and automatically process the spring at the given rate.

[0032] The key technologies of this invention are as follows: (1) Cooperative positioning logic of the core Z and the tool, and linkage parameterization of the core Z angle (close winding start point) and the curve gauge height (average mean diameter control); (2) CNC program chain: continuous action coding from wire feeding to cutting, especially the pitch dynamic control of the 5th line program to the 7th line program, i.e. program value 111.0→106.8; (3) Auxiliary tool fixing mechanism: mechanical constraint design of the second auxiliary tool on the first auxiliary tool to avoid the average mean diameter deviation caused by the head lifting.

[0033] This invention proposes a winding idea and method for compression springs based on the CNC program of the QZ-1026 equipment, realizing a collaborative control process between the cutting tool and the rotating core, and achieving a coupled control mechanism between the average pitch diameter and the pitch: achieved through the coordinated action of the first auxiliary tool, the curve gauge, and the pitch tool.

[0034] The foregoing has provided a detailed description of a method for winding a compression spring according to the present invention. Specific examples have been used to illustrate the structure and working principle of the invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A method for winding a compression spring, characterized in that: This is achieved using a CNC spring winding machine, and includes the following steps. Step 1: Initial positioning, adjust the positions of the rotating core Z, the first auxiliary knife, the second auxiliary knife, and the curve gauge according to the pre-prepared compression spring dimensions; Step 2: Wire introduction, feed the wire to the near end of the lower half of the Z-shaped core, control the pitch cutter to move forward so that the wire is raised and contacts the Z-plane of the core, feed the wire a second time so that it is stably overlapped on the Z-plane of the core, and the pitch cutter retracts to the non-interference position for the first time. Step 3: Main body winding. Quantitatively feed steel wire to complete the first tight winding. Move the pitch cutter forward to the preset pitch control position. Continuously feed steel wire according to the preset number of turns to wind the spring body. The pitch cutter retracts to the non-interference position. Quantitatively feed steel wire to complete the last tight winding. The pitch cutter returns to the origin. Step 4: Cutting and shaping, quantitatively feeding steel wire to form a pre-cutting section, raising the cutter to the cutting height to separate the steel wire, and then resetting the cutter to the origin.

2. The method for winding a compression spring according to claim 1, characterized in that: CNC spring winding machine includes Alignment system: includes wire feed roller and guide plate, the wire feed roller is named wire feed Y; Mandrel system: includes a rotating mandrel, named Rotating Mandrel Z, which completes winding by rotating in conjunction with the cutting tool; Motor linkage system: includes eight cams from cam ×1 to cam ×8, each cam is equipped with a dedicated cutting tool; Computer control system: Composed of control panel and sensors, it controls the mandrel system and motor linkage system to complete the spring production by setting the spring winding program.

3. The method for winding a compression spring according to claim 2, characterized in that: Cutting tools include Curve gauge: Used for the bending and deformation of springs, mounted on cam ×1; Cutter: Used to cut the spring, mounted on cam ×5; Pitch cutter: Used to control the spring pitch, mounted on cam ×6; First auxiliary tool: Used in conjunction with the curve gauge to assist in spring forming and control the average mean diameter of the spring; mounted on cam ×7. Second auxiliary blade: used to fix the first auxiliary blade and prevent its head from tilting up, mounted on cam ×8.

4. The method for winding a compression spring according to claim 1, characterized in that: Step 1 specifically involves adjusting the rotating core Z to a preset tight winding angle, moving the first auxiliary knife laterally to the overtravel position directly below the steel wire, driving the second auxiliary knife to abut against the first auxiliary knife to achieve positioning, adjusting the longitudinal position of the curve gauge based on the average middle diameter of the spring, locking the spatial positions of the rotating core Z and cams ×1, ×7 and ×8, and obtaining the corresponding coordinate line program value through these spatial positions.

5. The method for winding a compression spring according to claim 4, characterized in that: In step 1, the specific coordinate line program values ​​for the core Z-axis, the first auxiliary tool, the second auxiliary tool, and the curve gauge are as follows: Rotation Z: The coordinate line program value depends on the relative angle of rotation of the rotation core after reaching the preset position; Second auxiliary tool: The coordinate line program value depends on the relative distance of cam ×8 after reaching the preset position; First auxiliary tool: The coordinate line program value depends on the relative distance of cam ×7 after reaching the preset position; Curve gauge: The value of the coordinate line program depends on the average mean diameter D of the spring, that is, when the distance between the groove of the curve gauge and the Z plane of the rotating core is D / 2, the relative distance of cam ×1 is (180~182) - D / 2.

6. The method for winding a compression spring according to claim 1, characterized in that: In step 2, The steel wire is delivered to the rotating core Z for the first time. At this time, the value of the rotating core Z corresponding to the first line of the program depends on the absolute distance of the wire feed Y when the corresponding action is completed. The pitch tool moves, and the value of the pitch tool corresponding to the second line of the program depends on the relative distance of cam ×6 when the corresponding action is completed; The steel wire rests on the rotating core Z. At this time, the value of the rotating core Z corresponding to the third line of the program depends on the absolute distance of the wire feed Y when the corresponding action is completed. When the pitch tool retracts, the value of the fourth line of the program for the pitch tool depends on the relative distance of cam ×6 when the corresponding action is completed. The value of the fourth line of the program for the pitch tool is less than or equal to the value corresponding to the second line of the program for the pitch tool.

7. The method for winding a compression spring according to claim 1, characterized in that: In step 3, When the first round of tight winding is used to transport the steel wire, the value of the wire feed Y corresponding to the 5th line of the program depends on the average mean diameter D of the spring, that is, the absolute distance of the wire feed Y when the spring is tightly wound for one round. This value = 10 / (3π)*π*D = (10 / 3)*D≈3.33D; The pitch of the control spring for the forward movement of the pitch cutter, corresponding to the value in line 5 of the program, depends on the spring pitch t, ​​which is the relative distance between cam × 6 when the corresponding action is completed. This value = the value corresponding to line 2 of the program + (0.5~1.0) * t; The steel wire is fed to wind the spring body. The value of the wire feed Y corresponding to the 6th line of the program depends on the effective number of turns Na of the spring, that is, the absolute distance of the wire feed Y when the corresponding action is completed. This value = 10 / (3π)*π*D*(Na-1) = (10 / 3)*D*(Na-1)≈3.33D*(Na-1); When the last turn is tightly wound and the pitch cutter retracts to the non-interference position, the value of the feed line Y corresponding to the 7th line of the program depends on the average mean diameter D of the spring, that is, the absolute distance of the feed line Y when the spring is tightly wound for one turn. This value = 10 / (3π)*π*D = (10 / 3)*D≈3.33D; The value corresponding to line 7 of the pitch tool program is the relative distance of cam × 6 when the corresponding action is completed. This value is less than or equal to the value corresponding to line 2 of the pitch tool program program. The pitch tool retracts to its origin, and the value of the pitch tool corresponding to line 8 of the program is 0.

0.

8. The method for winding a compression spring according to claim 1, characterized in that: In step 4, For wire conveying, the value of the feed line Y corresponding to line 9 of the program is the absolute distance of feed line Y when it is tightly wound half a turn. This value = 1 / 2 * 3.33D = 1.665D. Cutting, the value of the cutter corresponding to line 10 of the program depends on the relative distance of cam ×5 when the corresponding action is completed; The cutter returns to its origin, corresponding to a value of 0.0 in line 11 of the program.

9. The method for winding a compression spring according to claim 2, characterized in that: The computer control system achieves operation control in the following ways: Manual mode activation: Activate F6 in the manual operation interface. F6 is the manual mode selection button, entering the single-axis independent control state. Actuator control: In manual mode, select the control channel corresponding to the target actuator, and drive the actuator to move through the axial input device; Automatic production start: After the CNC program is completed, the automatic execution command F8 is triggered. F8 is the automatic production button that calls the stored CNC program to control the continuous production of the spring winding machine.

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