Precision forging method for creating the bottom texture of golf club heads

Abstract

This invention provides a method for precision forging a golf club head with a bottom pattern. The steps include: providing a rod-shaped metal substrate made of metal material and pre-bending the rod-shaped metal substrate; subsequently, in the step of forging a single-lobe club head blank, using a first-stage forging die to forge the pre-bent rod-shaped metal substrate into a single-lobe club head blank; then, in the step of forging a double-lobe club head blank, using a second-stage forging die to forge the single-lobe club head blank into a double-lobe club head blank; and finally, in the step of forging a finished club head with a bottom pattern, using a third-stage forging die to forge the double-lobe club head blank into a finished club head with both bottom patterns and a double lobe. The advantages of this invention are that it eliminates the time-consuming and costly process of machining the bottom pattern on existing club heads.

Description

Technical Field

[0001] This invention belongs to the field of golf club head manufacturing technology, and particularly relates to a method for precision forging to form bottom textures in golf club heads. Background Technology

[0002] Golf clubs, such as irons, have uniquely shaped clubheads. The clubheads of irons are mostly made of metal and formed through precision casting or forging. Currently, to improve the hitting performance of the clubhead, some irons have textured soles. This textured structure reduces friction between the clubhead and the ground, improving the smoothness of the swing.

[0003] The existing method for forming the bottom texture of club heads such as irons involves shaping the club head by milling using computer numerical control (CNC) machining tools after the club head is formed.

[0004] Due to the special shape of the cue head, it must be mounted on the CNC machining machine using a fixture. Due to the dimensional error in positioning the cue head in the fixture, and the fact that the texture must be machined on the bottom surface of the cue head with a double tilt angle, it is difficult to control the quality of the texture formed on the bottom of the cue head. In addition, the milling process has the problems of long processing time and high cost. Summary of the Invention

[0005] The purpose of this invention is to provide a method for precision forging to form bottom textures in golf club heads, thereby solving the problem of time-consuming and labor-intensive methods for forming bottom textures in existing golf club head processing.

[0006] To achieve the aforementioned objectives, the present invention proposes a method for precision forging a golf club head with a bottom texture, comprising:

[0007] Provide a rod-shaped metal substrate made of a metallic material, and pre-bend the rod-shaped metal substrate;

[0008] The forging process involves using a first-stage forging die on a forging machine to forge a pre-bent rod-shaped metal substrate into a single-angle rod head blank in one or more forging passes.

[0009] The step of forging a double-inclination rod head blank involves using a second-stage forging die located on one of the forging machines to forge the single-inclination rod head blank in one or more passes to form a double-inclination rod head blank; and

[0010] The step of forging a clubhead with a bottom pattern involves using a third-stage forging die on the forging machine to forge the double-loose clubhead blank in one or more passes to form a clubhead with a striking face and a double loose, and integrally forming a bottom pattern on the bottom of the clubhead.

[0011] Preferably, in the step of forging a single-angle rod head blank, the base of the forged blank has a first reference surface. This first reference surface has a first tilt angle and a second tilt angle relative to a first axis and a second axis that are perpendicular to each other in a reference surface of the forging machine, respectively. The first tilt angle is between... The second tilt angle is In the step of forging a double-loose clubhead blank, the forged double-loose clubhead blank includes a clubhead base, which includes a striking face portion having the striking surface and a clubhead bottom portion located on the lower back section of the striking face portion. The clubhead base has a second reference surface, and the first tilt angle of the second reference surface relative to the first axis of the reference reference surface is between... The second tilt angle of the second reference plane relative to the second axis of the reference reference plane is between .

[0012] Preferably, in the step of forging the double loft clubhead blank, the second forging die moves a parting line of the forged double loft clubhead blank forward from the center line of the lower section of the striking face to the bottom edge adjacent to the striking face; in the step of forging the finished clubhead with bottom texture, the forging is performed in the area where the bottom texture is distributed, which is adjacent to the bottom edge of the striking face.

[0013] Preferably, in the step of forging a single-angle rod head blank, the forging heating temperature is controlled between 700℃ and 1100℃; in the step of forging a double-angle rod head blank, the forging heating temperature is controlled between 700℃ and 1100℃; and in the step of forging a finished rod head with bottom patterns, the forging heating temperature is controlled between 700℃ and 1100℃.

[0014] Preferably, the bottom texture consists of multiple spaced linear stripes or a plurality of spaced circular, elliptical, or polygonal indentations.

[0015] The beneficial effects of this invention are:

[0016] 1. Reduce manufacturing time and processing costs for golf club heads with bottom patterns: The present invention's precision forging method for golf club heads with bottom patterns utilizes a three-stage progressive precision forging process. The provided rod-shaped metal substrate is sequentially forged into a single-loper club head blank, then forged into a double-loper club head blank, and finally forged into a finished club head with bottom patterns. This allows for precise shape control using a precision forging die, forming the bottom pattern simultaneously with the forging of the predetermined club head shape. This more effectively completes the manufacturing of precision forged golf club heads with bottom patterns, overcoming the problems of long processing time and high processing costs associated with existing club head manufacturing methods that require forging the finished club head first and then machining to form the bottom pattern.

[0017] 2. Improve the precision and quality of the bottom pattern of the clubhead: As mentioned above, the golf clubhead manufacturing method of precision forging with bottom pattern of the present invention involves sequentially forging the provided rod-shaped metal substrate into a single-loper clubhead blank, then forging it into a double-loper clubhead blank, and finally forging it into a finished clubhead with bottom pattern. This allows for the use of a three-stage progressive precision forging method to produce a clubhead with precision forging bottom pattern under the shape control of a precision forging die and the control of forging temperature at different stages. It can also precisely control the shape and position of the bottom pattern, ensuring that the clubhead product has high precision, high quality and good quality consistency.

[0018] 3. The bottom texture can be varied when using a forging die; As mentioned above, the golf club head manufacturing method of the present invention for precision forging to form a bottom texture is that, in the step of forging a club head with a bottom texture, the bottom texture is formed at the same time as forging the predetermined shape of the club head. Therefore, various shape variations can be made according to different golf club head products, and club head products with consistent quality can be produced. Attached Figure Description

[0019] Figure 1 This is a flowchart of the method for precision forging to form the bottom texture of a golf club head according to the present invention;

[0020] Figure 2 This is a side view of the forging process of the single-angle rod head blank using a first-stage forging die in the forging process of the present invention.

[0021] Figure 3 This is a side view of another perspective in the process of forging a single-angle rod head blank using a first-stage forging die in the forging process of the present invention.

[0022] Figure 4 This is a side view of the double-tilt rod head blank formed by forging with a second-stage forging die in the forging process of the present invention.

[0023] Figure 5 This is a schematic diagram of another side view of the forging process of the double-tilt rod head blank using a second-stage forging die in the forging process of the present invention.

[0024] Figure 6 This is a side view of the third-stage forging die used in the forging process of the present invention to forge a rod head with bottom texture.

[0025] Figure 7 This is another planar schematic diagram of the third-stage forging die used in the forging process of the present invention to forge a finished rod head with bottom texture.

[0026] Figure 8 This is a side plan view of the finished rod head with bottom texture formed by forging according to the present invention;

[0027] Figure 9 This is a plan view of the rod head with bottom texture, which is forged and formed according to the present invention.

[0028] The symbols are explained as follows:

[0029] 10: First-stage forging die

[0030] 20: Second-stage forging die

[0031] 30: Third-stage forging die

[0032] A1: Single-angle rod head blank

[0033] A10: Base of the primary embryo

[0034] A11: Rod connection part

[0035] A12: Striking surface

[0036] A13: Bottom

[0037] A2: Double-inclination rod head blank

[0038] A20: Base of clubhead

[0039] A21: Rod connection part

[0040] A22: Striking surface

[0041] A23: Clubhead Bottom

[0042] A3: Finished clubhead

[0043] A30: Base of clubhead

[0044] A31: Rod connection part

[0045] A32: Striking surface

[0046] A33: Clubhead Bottom

[0047] A34: Bottom Texture

[0048] P1: First reference plane

[0049] P2: Second reference plane

[0050] S: Reference plane Detailed Implementation

[0051] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0052] like Figure 1 As shown, a specific embodiment of the method for precision forging a golf club head with bottom texture according to the present invention includes the following steps:

[0053] Provide a rod-shaped metal substrate made of metallic material, and pre-bend the rod-shaped metal substrate;

[0054] The steps for forging a single-angle rod head blank;

[0055] The steps of forging a double-inclination rod head blank; and

[0056] The steps for forging and shaping the finished club head A3 with bottom texture.

[0057] In the step of providing a rod-shaped metal substrate made of metal material, the rod-shaped metal substrate is pre-bent. The metal material can be carbon steel, stainless steel, or other metal materials. The carbon steel can be selected according to the American Iron and Steel Institute-Society of Automotive Engineers (AISI-SAE) standards 1020C, 1025C, 1035C, 1045C, or 35CrMo, depending on the carbon content or alloy composition. The stainless steel can be selected according to the Japanese Industrial Standard (JIS) standards SUS303, SUS304, SUS431, 17-4PH, etc., depending on the alloy composition.

[0058] like Figure 2 and Figure 3As shown, in the step of forging a single-lobe clubhead blank A1, a pre-bent rod-shaped metal substrate is forged in one or more passes using a first-stage forging die 10 of a forging machine to form a single-lobe clubhead blank A1. The single-lobe clubhead blank A1 forms a blank base A10 with a striking surface A12 and a rod connection portion A11 obliquely formed on one side of the blank base A10. The blank base A10 has a bottom A13 and a first reference surface P1. The first reference surface P1 has a first tilt angle θ1 and a second tilt angle θ2 relative to a first axis and a second axis perpendicular to each other in a reference surface S of the forging machine, respectively. The first tilt angle θ1 is between... The second tilt angle θ2 is In the aforementioned step of forging a single-angle rod head blank A1, the forging heating temperature is controlled between 700℃ and 1100℃. The forging heating temperature is adjusted according to the selected metal material. In this embodiment, the first tilt angle θ1 is controlled at... The forging heating temperature is controlled between 900℃ and 1100℃.

[0059] like Figure 4 and Figure 5 As shown, the step of forging the double loft clubhead blank A2 involves using a second-stage forging die 20 on a forging machine to forge the single loft clubhead blank A1 into a double loft clubhead blank A2 in one or more forging passes. The double loft clubhead blank A2 forms a clubhead base A20 and a club connection portion A21 obliquely formed on one side of the clubhead base A20. The clubhead base A20 includes a striking face portion having the striking surface A22 and a clubhead bottom portion A23 located on the lower back of the striking face portion. The clubhead base A20 has a second reference surface P2, which has a first tilt angle θ1 and a second tilt angle θ2 relative to the first and second axes perpendicular to each other in the reference reference surface S, respectively. The first tilt angle θ1 is between... And change the second tilt angle θ2 between In the step of forging the double-tilt rod head blank A2, the forging heating temperature is controlled between 700℃ and 1100℃. The forging heating temperature is adjusted according to the selected metal material. In this embodiment, the first tilt angle θ1 is controlled at... The forging heating temperature is controlled between 900℃ and 1100℃.

[0060] like Figures 6 to 9As shown, the step of forging a clubhead A3 with a bottom texture A34 involves using a third-stage forging die 30 on the forging machine to forge the double-loose clubhead blank A2 in one or more passes to form a clubhead A3 with a striking face and a double loose angle. Essentially, the clubhead A3 is identical to the double-loose clubhead blank A2, and also has a clubhead base A30 and a club connection portion A31 obliquely formed on one side of the clubhead base A30. The clubhead base A30 includes a striking face portion with a striking face A32 and a clubhead bottom A33 located on the lower back of the striking face portion. The clubhead A3 has a reference surface, which is the same as the second reference surface P2 of the clubhead base A20 of the double-loose clubhead blank A2, and has a first tilt angle θ1 and a second tilt angle θ2 relative to the first and second axes perpendicular to each other in the reference reference surface S, respectively. The first tilt angle θ1 is between... The second tilt angle θ2 is between Furthermore, the bottom of the finished rod head A3 is further integrally formed with a bottom texture A34. In the step of forging the bottom texture A34, the forging heating temperature is controlled between 700℃ and 1100℃. The forging heating temperature is adjusted according to the selected metal material. In this embodiment, the first tilt angle θ1 is controlled at... The forging heating temperature is controlled between 700℃ and 1100℃.

[0061] In the step of forging the double loft clubhead blank A2, while forging the double loft clubhead blank A2, the parting line of the forged double loft clubhead blank A2 can be further moved forward from the center line of the lower section of the striking face to the bottom edge adjacent to the striking face by the second forging die 20. Continuing in the step of forging the finished clubhead A3 with bottom texture A34, the distribution area of ​​the bottom texture A34 formed on the finished clubhead A3 can be extended to the bottom edge adjacent to the striking face. The texture can be multiple spaced linear stripes, or a plurality of spaced circular or elliptical indentations, or a plurality of spaced polygonal (e.g., triangular, quadrilateral, pentagonal, hexagonal, octagonal, etc.) indentations, or other geometrical indentations, etc.

[0062] In the method for manufacturing a golf club head with a bottom texture A34 by precision forging according to the present invention, after the step of forging to form a finished club head A3 with a bottom texture A34, the finished club head A3 formed by forging is further processed by grinding to remove the parting line and burrs and other excess material of the finished club head A3. Then, a surface treatment step is performed to form a club head of a predetermined shape.

[0063] As described above, the golf club head manufacturing method of the present invention, which uses precision forging to form the bottom texture A34, mainly utilizes a three-stage progressive precision forging method. The provided rod-shaped metal substrate is sequentially forged to form a single-loper club head blank, then forged to form a double-loper club head blank A2, and finally forged to form a finished club head A3 with the bottom texture A34. This allows for shape control with a precision forging die, resulting in a golf club head with the precision forging of the bottom texture A34. The bottom texture A34 can be shaped in various ways according to different club head products, and its shape and position can be precisely controlled to ensure that the mass-produced club head products have high quality and good quality consistency.

[0064] The embodiments described above are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A method of precision forging a golf club head with a bottom pattern, comprising the steps of: Comprising: ​ providing a metal material made of a rod-shaped metal base material, and pre-bending the rod-shaped metal base material; a step of forging a single-inclination head blank: using a first-stage forging die provided in a forging machine to forge the pre-bent rod-shaped metal base material one or several times to form a single-inclination head blank; a step of forging a double-inclination head blank: using a second-stage forging die provided in the forging machine to forge the single-inclination head blank one or several times to form a double-inclination head blank; and a step of forging a head product with a bottom texture: using a third-stage forging die provided in the forging machine to forge the double-inclination head blank one or several times to form a head product with a hitting face and a double-inclination, and integrally forming a bottom texture at the bottom of the head product.

2. The method of claim 1, wherein the bottom surface of the head is formed by a plurality of grooves. wherein, In the step of forging the single-inclination-angle head blank, the forged head blank has a first reference surface with a first inclination angle and a second inclination angle with respect to a first axis and a second axis of a reference surface of the forging machine, respectively, the first inclination angle is between , and the second inclination angle is between ; in the step of forging the double-inclination-angle head blank, the forged double-inclination-angle head blank includes a head base including a hitting face plate portion having the hitting face and a head bottom portion located at a back lower section of the hitting face plate portion, the head base has a second reference surface with a first inclination angle with respect to the first inclination angle of the first axis of the reference surface between , and a second inclination angle with respect to the second inclination angle of the second axis of the reference surface between .

3. The method of claim 2, wherein the bottom surface of the head is formed by a plurality of grooves. wherein, in the step of forging a double-inclination head blank, the second-stage forging die makes a closing line of the forged double-inclination head blank move forward from a middle line position of the lower segment of the hitting face panel to a bottom edge adjacent to the hitting face; and in the step of forging a head product with a bottom texture, the forged bottom texture is distributed in a region adjacent to the bottom edge of the hitting face of the head product.

4. The method of claim 1-3, wherein the method further comprises: wherein, in the step of forging a single-inclination head blank, the forging heating temperature is controlled between 700°C and 1100°C; in the step of forging a double-inclination head blank, the forging heating temperature is controlled between 700°C and 1100°C; and in the step of forging a head product with a bottom texture, the forging heating temperature is controlled between 700°C and 1100°C.

5. The method of claim 4, wherein the bottom surface of the head is formed by a plurality of grooves. wherein, the bottom texture is a plurality of linear stripes arranged at intervals, or a plurality of concave dots arranged at intervals in a circular, elliptical, or polygonal shape.

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