Hole pattern special for double-groove special-shaped spring flat steel

Abstract

The utility model discloses a hole pattern special for double-groove special-shaped spring flat steel, belongs to the technical field of special-shaped spring flat steel rolling technologies, and solves the technical problems that in the existing product rolling technology in the prior art, a middle face and two side faces are not located on the same horizontal plane, double grooves of a finished product are prone to asymmetrical deviation, and fish scale patterns of the finished product are not resistant to abrasion. The hole pattern special for the double-groove special-shaped spring flat steel comprises a transversely-unfolded middle hole and two side holes, the middle hole is symmetrical along the central axis, and the two side holes are asymmetrical along the central axis of the middle hole. The outer end inner arc width B1 in the two side holes is greater than the inner end inner arc width B3 in the two side holes; the hole pattern height h1 of the two-side holes is / 2 of the thickness of the finished product, the hole pattern height h2 of the middle hole is equal to h1-delta, the delta is the thickness compensation value of the double-groove middle hole part, namely the height value that the bottom height of the middle hole is higher than the bottom height of the two-side holes, and the delta is larger than 0.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the special groove of double groove special shaped spring flat steel belongs to the special groove of double groove special shaped spring flat steel, and the utility model discloses a double groove special shaped spring flat steel special groove. BACKGROUND

[0002] The suspension system of automobile, agricultural vehicle is the support of car body, improves the feeling of riding, decides the stability, comfort and safety of car. Spring is the important component of suspension system, is used to buffer shock, absorbs the energy of deformation, and the most commonly used spring type is " leaf spring ", according to different vehicle, selects the spring flat steel of different section shape to make. With the vigorous development of national automobile industry, the requirement of light weight is higher and higher. For the agricultural vehicle of cost-effective pursuit, using the double groove spring flat steel of corresponding performance not reduced is one of light weight weight reduction ways.

[0003] Double groove special shaped spring flat steel finished product rack adopts the rolling of hole type roller, so the process parameter of finished product hole type is particularly important. But due to the middle hole of double groove special shaped spring flat steel finished product hole type is limited to spread, both sides hole free spread, cause the middle surface and both sides not in the same horizontal plane. The upper roller of finished product hole type has the hole type lower roller for flat roller, and the flat roller of double groove part is particularly large, cause the flat roller of this part appears " fish scale pattern ", and the steel quantity is only about 100t, and the production efficiency is seriously restricted. It is difficult to adjust during rolling, and it is easy to produce problems such as slot deviation. SUMMARY

[0004] The utility model discloses a double groove special shaped spring flat steel special groove that solves the above-mentioned existing middle surface and both sides surface not in the same horizontal plane, finished product double groove easy to be asymmetric and slot deviation, finished product slot " fish scale pattern " not wear-resistant.

[0005] To realize above-mentioned purpose, the utility model discloses a double groove special shaped spring flat steel special groove, including the double groove special shaped spring flat steel special groove of the middle hole and two both sides hole that expand horizontally, the middle hole is the hole type along the symmetry of middle axis, and the both sides hole is the hole type along the unsymmetry of the hole middle axis, and the outer end intrados width B1 in both sides hole is greater than the inner end intrados width B3 in both sides hole;

[0006] The hole type height h1 of both sides hole is finished product thickness / 2, and the hole type height h2 of the middle hole is h1-Δ, and Δ is the thickness compensation value of double groove middle hole part, that is, the height value that the middle hole bottom height is higher than the both sides hole bottom height, and Δ is greater than 0.

[0007] Preferably, the middle connecting surface between the middle hole and the two both sides holes is in the same horizontal plane as the both sides surface connected to the both ends of the product.

[0008] The special hole width is preferably as follows:

[0009] The thickness compensation value Δ of the double-groove middle hole is different according to the finished product size, and Δ=0.5-1.1mm;

[0010] The outer end inner arc width B1 in the two-side hole is the finished product thickness / 2;

[0011] The inner end inner arc width B3 in the two-side hole is 2-3.72mm according to the finished product size;

[0012] The middle hole is a trapezoidal hole symmetrical along the middle axis, and the width B5 of the two sides of the trapezoidal hole is B5=B3-(0.15mm-0.61mm) according to the finished product size.

[0013] Preferably, the two-side hole bottom width B2 is 9.25mm when the finished product size is 63mm, 12.75-13.04mm when the finished product size is 75mm, and 13.5-14.65mm when the finished product size is 90mm;

[0014] The top width B4 between the two-side hole and the middle hole is 10mm when the finished product size is 63mm, 5.74-8.38mm when the finished product size is 75mm, and 10.22-12.23mm when the finished product size is 90mm.

[0015] Preferably, the middle hole bottom width B6 is 18mm when the finished product size is 63mm, 25mm when the finished product size is 75mm, and 28.92-30mm when the finished product size is 90mm.

[0016] Preferably, the outer end inner arc in the two-side hole is a circular arc, and the diameter D of the circular arc is equal to the finished product thickness.

[0017] Preferably, the outer end inner arc in the two-side hole and the finished product outer end platform connecting place chamfer circular arc radius R is 2-3mm.

[0018] Preferably, the two top corners of the middle hole bottom are also chamfered structures, and the chamfer radius R1 is 1-2mm;

[0019] The two chamfered circular arc radii R of the middle hole top and the two-side hole connecting platform are 2-3mm.

[0020] The utility model provides a double-groove special hole for special-shaped spring flat steel. The utility model has the following beneficial effects:

[0021] The special groove of the double-groove special-shaped spring flat steel of the utility model is used for producing single-face double-groove special-shaped spring flat steel, and has a clever and scientific structure design, and after thickness compensation of the middle part of the double groove, the problem of too high middle plane and two side planes not on the same horizontal plane is effectively eliminated.

[0022] The width B5 of the two side slopes of the middle hole is properly adjusted, so that the steel flows to the middle during rolling, the difficulty of adjusting the finished double-groove asymmetry and groove deviation is reduced, the service life of the finished groove is increased to 400 tons, the service life is significantly prolonged, and economic benefits are increased. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structure diagram of the groove of the utility model.

[0024] In the figure, h1 is the groove height of the two side holes, h2 is the groove height of the middle hole, Delta is the thickness compensation value of the middle hole part of the double groove, B1 is the width of the outer end inner arc in the two side holes, B2 is the bottom width of the two side holes, B3 is the width of the inner end inner arc in the two side holes, B4 is the top width of the connection between the two side holes and the middle hole, B5 is the width of the two side slopes of the middle hole, B6 is the bottom width of the middle hole, and R1 is the chamfer structure radius of the two top corners at the bottom of the middle hole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0026] In the utility model, unless otherwise clearly defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or can be integrated; can be mechanical connection, can be electrical connection; can be directly connected, can be indirectly connected through an intermediate medium, can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] Please refer to Figure 1 The utility model provides a technical scheme:

[0028] The special groove of the double-groove special-shaped spring flat steel comprises a middle hole and two side holes, the middle hole is a symmetrical hole along a middle axis, the side holes are asymmetrical holes along the middle axis of the holes, the outer end inner arc width B1 in the side hole is greater than the inner end inner arc width B3 in the side hole; the hole height h1 of the side hole is the finished product thickness / 2, the hole height h2 of the middle hole is h1-Δ, Δ is a double-groove middle hole thickness compensation value, that is, the height value of the middle hole bottom height higher than the side hole bottom height, and Δ is greater than 0.

[0029] The middle connecting surface connected between the middle hole and the two side holes is in the same horizontal plane with the two side surfaces connected between the two side holes and the two ends of the product.

[0030] The special groove width size is specifically as follows:

[0031] The double-groove middle hole thickness compensation value Δ is different according to different finished product sizes, and Δ=0.5-1.1mm;

[0032] The outer end inner arc width B1 in the side hole is the finished product thickness / 2;

[0033] The inner end inner arc width B3 in the side hole is 2-3.72mm according to different finished product sizes;

[0034] The middle hole is a symmetrical trapezoidal hole along the middle axis, the width B5 of the two sides of the middle hole is B3-(0.15mm-0.61mm) according to different finished product sizes. The two top corners of the middle hole bottom are also chamfered structures, and the chamfer radius R1 thereof is 1-2mm.

[0035] The side hole bottom width B2 is 9.25mm when the finished product specification width is 63mm, 12.75-13.04mm when the finished product width is 75mm, and 13.5-14.65mm when the finished product width is 90mm;

[0036] The outer end inner arc in the side hole is a circular arc, and the diameter D of the circular arc is equal to the finished product thickness. The chamfered circular arc radius R of the connection between the outer end inner arc in the side hole and the product outer end platform is 2-3mm.

[0037] The top width B4 between the side hole and the middle hole is 10mm when the finished product specification is 63mm, 5.74-8.38mm when the finished product width is 75mm, and 10.22-12.23mm when the finished product width is 90mm.

[0038] The bottom width B6 of the middle hole is 18 mm when the width of the finished product is 63 mm, 25 mm when the width of the finished product is 75 mm, and 28.92-30 mm when the width of the finished product is 90 mm. The radius R of the two chamfers at the connection platform of the top of the middle hole and the two side holes is 2-3 mm.

[0039] The hole type of the utility model has the above structure design, after thickness compensation of the double-groove middle part, the problem of the middle plane being too high and the two side planes not being on the same horizontal plane is eliminated. After appropriate adjustment of the width B5 of the two sides of the middle hole, the steel flows to the middle during rolling, the difficulty of adjusting the asymmetric groove of the finished product is reduced, the service life of the finished groove is increased to 400 tons, and economic benefits are increased.

[0040]

[0041] Table 2: Hole type size parameters according to different finished product specifications

[0042] The above is only an embodiment of the utility model, and the hole type special for the double-groove special-shaped spring flat steel of the utility model according to different finished product specifications as shown in Table 2 can realize the hole type special for the double-groove special-shaped spring flat steel.

[0043] The above is only a preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A special pass for flat spring of double groove profile, characterized in that: The special groove for double-groove special-shaped spring flat steel includes a transversely expanded middle hole and two side holes, the middle hole is a symmetrical hole along the middle axis, the side holes are asymmetrical holes along the middle axis, and the width B1 of the outer end inner arc in the side hole is greater than the width B3 of the inner end inner arc in the side hole; The groove height h1 of the side hole is half of the finished product thickness, and the groove height h2 of the middle hole is h1-Δ, Δ is the thickness compensation value of the double-groove middle hole part, that is, the height value of the middle hole bottom height higher than the side hole bottom height, and Δ is greater than 0.

2. The special pass for flat spring of double groove special-shaped spring according to claim 1, characterized in that: The middle connecting surface between the middle hole and the two side holes is in the same horizontal plane as the two side surfaces connected with the product ends.

3. The special pass for flat spring of double groove special-shaped spring according to claim 1, characterized in that: The special groove width is as follows: The thickness compensation value Δ of the double-groove middle hole part is different according to the finished product size, and Δ is 0.5-1.1 mm; The width B1 of the outer end inner arc in the side hole is half of the finished product thickness; The width B3 of the inner end inner arc in the side hole is 2-3.72 mm according to the finished product size; The middle hole is a symmetrical trapezoidal hole along the middle axis, and the width B5 of the two side slopes of the middle hole is B3-(0.15-0.61) mm according to the finished product size.

4. The special pass for flat spring of double groove special-shaped spring according to claim 1, characterized in that: The bottom width B2 of the side hole is 9.25 mm when the finished product size is 63 mm, 12.75-13.04 mm when the finished product size is 75 mm, and 13.5-14.65 mm when the finished product size is 90 mm; The top width B4 of the connection between the side hole and the middle hole is 10 mm when the finished product size is 63 mm, 5.74-8.38 mm when the finished product size is 75 mm, and 10.22-12.23 mm when the finished product size is 90 mm.

5. The special pass for flat spring of double groove special-shaped spring according to claim 3, characterized in that: The bottom width B6 of the middle hole is 18 mm when the finished product size is 63 mm, 25 mm when the finished product size is 75 mm, and 28.92-30 mm when the finished product size is 90 mm.

6. The special pass for flat spring of double groove special-shaped spring according to claim 1, characterized in that: The outer end inner arc in the side hole is a circular arc, and the diameter D of the circular arc is equal to the finished product thickness.

7. The special pass for flat spring of double groove special-shaped spring according to claim 1, characterized in that: The chamfered circular arc radius R of the connection between the outer end inner arc in the side hole and the product outer end platform is 2-3 mm.

8. The special pass for flat spring of double groove special-shaped spring according to claim 1, characterized in that: The two top corners of the middle hole bottom are also chamfered structures, and the chamfered radius R1 is 1-2 mm; The chamfered circular arc radius R of the two chamfers at the connection between the middle hole top and the side hole connecting platform is 2-3 mm.

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