Solidworks software-based three-dimensional graph drawing method for flat spring with end part

Abstract

The invention discloses a three-dimensional graph drawing method for an end-part flat spring based on solidworks software, which comprises the following steps of: firstly, before drawing, dividing the end-part flat spring into three sections, namely two sections of supporting rings with flat end part cross sections and a section of middle working ring with a circular cross section; then, a supporting ring and a working ring are drawn respectively, and finally, the supporting ring and the working ring are combined to obtain the spring with the flat end. The supporting ring and the working ring are drawn respectively, and particularly, the tail end of the end-part-made flat spring is transited from a rectangle to a circle through drawing of the supporting ring, so that the end-part-made flat spring is closer to the end-part-made flat spring in actual production, and contact stress analysis on the end ring and the working ring of the spring is facilitated.

Description

Technical Field

[0001] The invention belongs to the field of spring modeling, in particular to a three-dimensional graphics drawing method of an end flat spring based on SolidWorks software. Background Art

[0002] In the actual production process in China, the end-flattened springs account for more than 90% of the hot-rolled springs, and the finite element analysis of the hot-rolled springs adopts the spring model with non-flattened ends. This spring model with non-flattened ends has differences in the two end forms when analyzing the contact stress between the spring end coil and the working coil. At present, many 3D software can easily draw the end-non-flattened springs. The main method is to first draw the spiral center line of the spring, and then use the center line as the path, and scan the circle with the same diameter of the spring material from one end of the center line to the other end to form a 3D diagram of the spring. Usually, the ends of the spring are flattened by cutting off the two ends to make it a spring with flat ends. However, the end-flattened spring cannot be drawn in this way because the end of the end-flattened spring is actually a transition from a rectangle to a circle, which cannot be achieved by cutting. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a three-dimensional graphics drawing method of an end-shaped flat spring based on SolidWorks software, which can draw the end-shaped flat spring in actual work, which is conducive to contact stress analysis between the spring end ring and the working ring.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: a three-dimensional graphics drawing method of an end flat spring based on solidworks software, comprising the following steps: S1. Before drawing, the end flat spring is divided into three sections, namely two sections of support rings with flat cross sections at the ends and one section of middle working ring with circular cross sections; S2, draw the support ring; S2.1. Use the [Spiral] feature command to draw a spiral line, and set the number of turns to 0.75 turns; S2.2. Use the [Loft] feature command to loft the rectangle at the end point of the spiral line of the supporting circle to the square at 0.75 turns of the spiral line of the supporting circle. Mark the end point of the spiral line of the supporting circle as point A, and the end point at 0.75 turns of the spiral line of the supporting circle as point B1. The length of the rectangle is consistent with the side length of the square, both of which are the spring material diameter d. S2.3. Use the [Surface Lofting] feature command to loft the surface from the inscribed circle of the square at 0.75 of the support circle to the circumscribed circle of the largest rectangle at 0.5 of the support circle; S2.4. Use the [Split] feature command to split and remove the non-intersecting parts after surface lofting, and keep the intersecting parts; S2.5. Use the [Round Corner] feature command to round the edges and the rectangular ends of the support ring; S3, draw a work circle; S4, combined support ring and working ring.

[0005] The step S3 specifically includes the following steps: S3.1. Use the [Spiral] feature command to draw a spiral line. The pitch is variable. There are working transition circles at both ends of the spiral line and the pitch of the two working transition circles is consistent. The endpoint of the starting end of the working transition circle is marked as point B2. The pitch of the starting end of the working transition circle is t B2 The pitch of the thread at the end of the working transition ring is consistent with that of the supporting ring, which is half of the spring material diameter, that is, d / 2. C , t C The same as the pitch t of the working circle, that is, t C =t, the pitch t of the working circle is equal to the free height H0 of the spring minus the spring material diameter d divided by the total number of spring turns n t Subtract 1.5 turns from the ratio, that is: t = (H0-d) / (n t -1.5); S3.2. Use the [Scan] feature command to scan along the spiral line according to the circular contour to obtain the working circle of the end flattening spring, where the diameter of the circular contour is the spring material diameter d.

[0006] The number of turns of the working transition circle is α, 0.25≤α≤0.36.

[0007] The step S4 specifically includes the following steps: S4.1. Set the centers of the two ends of the working circle as the base points of the working circle, and the center of the circular surface end of the supporting circle as the base point of the supporting circle; S4.2. Set the center line of the working circle as the working circle baseline and the center line of the supporting circle as the supporting circle baseline; S4.3. Assemble the working ring and the two supporting rings, and use the [Match] command to The base point of the working circle coincides with the base point of the supporting circle, and the baseline of the working circle coincides with the baseline of the supporting circle.

[0008] The step S4 may further include the following steps: S4.1. Set the circular surfaces at both ends of the working circle as the working circle base surface, and the circular surface of the supporting circle as the supporting circle base surface; S4.2. Assemble the working ring and the two supporting rings, and use the [Match] command to The base surface of the working ring coincides with the base surface of the supporting ring.

[0009] Beneficial effects of the present invention: The present invention draws the flat end support ring and the middle circular working ring respectively based on SolidWorks software, and then combines the support ring and the working ring to form an end flat spring. Compared with the prior art, the end of the end flat spring is transitioned from a rectangle to a circle by drawing the support ring, providing a three-dimensional model of the end flat spring for contact stress analysis of the spring end ring and the working ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 is a flow chart of the present invention; Figure 2 is a flow chart of step S2 in the present invention; Figure 3 is a flow chart of step S3 in the present invention; Figure 4 This is a first flow chart of step S4 in the present invention; Figure 5 This is a second flow chart of step S4 in the present invention; Figure 6 A schematic diagram of a flat spring having an end portion according to the present invention; Figure 7 is a schematic diagram of a support ring of the present invention; Figure 8 is a schematic diagram of the working circle of the present invention; Fig. 9 It is a schematic diagram of the segmentation feature command in the support ring of the present invention; Fig.10 It is a schematic diagram of the helical feature command in the working circle of the present invention; Fig.11 It is the effect diagram of the lofting command in the support ring of the present invention. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0012] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments. Example

[0013] like Figures 1 to 11As shown, the present invention provides a three-dimensional graphics drawing method of an end flat spring based on solidworks software, comprising the following steps: S1. Before drawing, the end flattening spring is divided into three sections, namely two sections of end flattened support rings and one section of middle circular working ring; S2, draw the support ring; S2.1. Use the [Helixir] feature command to draw a helix, set the number of turns to 0.75 turns, and set the pitch to half the diameter of the spring material, that is, d / 2mm.

[0014] S2.2. Use the [Loft] feature command to loft the rectangle at the end point of the supporting circle helix to the square at 0.75 turns of the supporting circle helix. Mark the end point of the supporting circle helix as point A, and the end point at 0.75 turns of the supporting circle helix as point B1. The length of the rectangle is consistent with the side length of the square, where the side length of the square is the spring material diameter dmm, and the width of the rectangle is 0.2559dmm.

[0015] S2.3. Use the [Surface Lofting] feature command to loft the surface from the inscribed circle of the square at 0.75 of the support circle to the circumscribed circle of the largest rectangle at 0.5 of the support circle; S2.4, such as Fig. 9 As shown, use the [Split] feature command to split and remove the non-intersecting parts after surface lofting, and keep the intersecting parts; S2.5. Use the [Round Corner] feature command to round the edges and the rectangular ends of the support ring.

[0016] S3, draw a work circle; S4, combined support ring and working ring.

[0017] The step S3 specifically includes the following steps: S3.1. Use the [Spiral] feature command to draw a spiral line. The pitch is variable. There are working transition circles at both ends of the spiral line and the pitch of the two working transition circles is consistent. The endpoint of the starting end of the working transition circle is marked as point B2. The pitch of the starting end of the working transition circle is t B2 The pitch of the thread at the end of the working transition ring is consistent with that of the supporting ring, which is half of the spring material diameter, that is, d / 2. C , t C The same as the pitch t of the working circle, that is, t C =t, the pitch t of the working circle is equal to the free height H0 of the spring minus the spring material diameter d divided by the total number of spring turns n t Subtract 1.5 turns from the ratio, that is: t = (H0-d) / (n t -1.5); S3.2. Use the [Scan] feature command to scan along the spiral line according to the circular contour to obtain the working circle of the end flattening spring, where the diameter of the circular contour is the spring material diameter d.

[0018] The number of turns of the working transition circle is α, 0.25≤α≤0.36.

[0019] The step S4 specifically includes the following steps: S4.1. Set the centers of the two ends of the working circle as the base points of the working circle, and the center of the circular surface end of the supporting circle as the base point of the supporting circle; S4.2. Set the center line of the working circle as the working circle baseline and the center line of the supporting circle as the supporting circle baseline; S4.3. Assemble the working ring and the two supporting rings, and use the [Match] command to The base point of the working circle coincides with the base point of the supporting circle, and the baseline of the working circle coincides with the baseline of the supporting circle. Example

[0020] The steps S1 to S3 are consistent with the embodiment, and step S4 adopts the following steps: S4.1. Set the circular surfaces at both ends of the working circle as the working circle base surface, and the circular surface of the supporting circle as the supporting circle base surface; S4.2. Assemble the working ring and the two supporting rings, and use the [Match] command to The base surface of the working ring coincides with the base surface of the supporting ring.

[0021] Through the above method, the support ring and the working ring are drawn separately. In particular, the drawing of the support ring can realize the transition of the end of the flat spring from rectangle to circle, and establish a hot-rolled spring model in actual production, which is conducive to the contact stress analysis of the spring end ring and the working ring.

[0022] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A three-dimensional graphics drawing method for an end flat spring based on solidworks software, characterized in that: The following steps are involved: S1. Before drawing, the end flat spring is divided into three sections, namely two sections of support rings with flat cross sections at the ends and one section of middle working ring with circular cross sections; S2, draw the support ring; S2.

1. Use the [Spiral] feature command to draw a spiral line, and set the number of turns to 0.75 turns; S2.

2. Use the [Loft] feature command to loft the rectangle at the end point of the spiral line of the supporting circle to the square at 0.75 turns of the spiral line of the supporting circle. Mark the end point of the spiral line of the supporting circle as point A, and the end point at 0.75 turns of the spiral line of the supporting circle as point B1. The length of the rectangle is consistent with the side length of the square, both of which are the spring material diameter d. S2.

3. Use the [Surface Lofting] feature command to loft the surface from the inscribed circle of the square at 0.75 of the support circle to the circumscribed circle of the largest rectangle at 0.5 of the support circle; S2.

4. Use the [Split] feature command to split and remove the non-intersecting parts after surface lofting, and keep the intersecting parts; S2.

5. Use the [Round Corner] feature command to round the edges and the rectangular ends of the support ring; S3, draw a work circle; S4, combined support ring and working ring.

2. The method for drawing three-dimensional graphics of an end flat spring based on solidworks software according to claim 1 is characterized in that: The step S3 specifically includes the following steps: S3.

1. Use the [Spiral] feature command to draw a spiral line. The pitch is variable. There are working transition circles at both ends of the spiral line and the pitch of the two working transition circles is consistent. The endpoint of the starting end of the working transition circle is marked as point B2. The pitch of the starting end of the working transition circle is t B2 The pitch of the thread at the end of the working transition ring is consistent with that of the supporting ring, which is half of the spring material diameter, that is, d / 2. C , t C The same as the pitch t of the working circle, that is, t C =t, the pitch t of the working circle is equal to the free height H0 of the spring minus the spring material diameter d divided by the total number of spring turns n t Subtract 1.5 turns from the ratio, that is: t = (H0-d) / (n t -1.5); S3.

2. Use the [Scan] feature command to scan along the spiral line according to the circular contour to obtain the working circle of the end flattening spring, where the diameter of the circular contour is the spring material diameter d.

3. According to the method for drawing three-dimensional graphics of an end flat spring based on solidworks software as described in claim 2, the number of turns of the working transition circle is α, 0.25≤α≤0.

36.

4. The method for drawing three-dimensional graphics of an end flat spring based on solidworks software according to claim 1, characterized in that: The step S4 specifically includes the following steps: S4.

1. Set the centers of the two ends of the working circle as the base points of the working circle, and the center of the circular surface end of the supporting circle as the base point of the supporting circle; S4.

2. Set the center line of the working circle as the working circle baseline and the center line of the supporting circle as the supporting circle baseline; S4.

3. Assemble the working ring and the two supporting rings, and use the [Match] command to The base point of the working circle coincides with the base point of the supporting circle, and the baseline of the working circle coincides with the baseline of the supporting circle.

5. The method for drawing three-dimensional graphics of an end flat spring based on solidworks software according to claim 1, characterized in that: The step S4 specifically includes the following steps: S4.

1. Set the circular surfaces at both ends of the working circle as the working circle base surface, and the circular surface of the supporting circle as the supporting circle base surface; S4.

2. Assemble the working ring and the two supporting rings, and use the [Match] command to The base surface of the working ring coincides with the base surface of the supporting ring.

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