Golf club head with reduced weld distortion and method of manufacturing

Abstract

This invention relates to the field of golf equipment technology and relates to a golf head that can avoid welding deformation and its manufacturing method. The golf head that can avoid welding deformation includes a head body and a counterweight. The head body has an expanding cavity A and a contracting hole A connected sequentially from the bottom surface. The counterweight includes a large segment and a small segment connected sequentially, and the entire counterweight is embedded in a positioning pit A. The method for manufacturing the golf head that can avoid welding deformation includes the following steps: assembling a wax mold with the counterweight; preparing a wax mold of the head with the counterweight attached; removing the wax mold; preparing a shell mold of the head with the counterweight attached; removing the wax mold; preparing the head body with the counterweight attached; removing the shell mold; cutting the exposed portion of the counterweight; and welding the exposed window of the counterweight. This invention applies a uniquely designed counterweight to the entire manufacturing process of the golf head, significantly reducing the welding area of ​​the counterweight encasing process.

Description

Technical Field

[0001] This invention relates to the field of golf equipment technology, and in particular to a golf ball head that can avoid welding deformation and its manufacturing method. Background Technology

[0002] A golf club is the basic equipment in golf, consisting of a clubhead, shaft, and grip. The clubhead, due to its unique curved shape, is typically manufactured using a casting process. A typical golf clubhead shape can be found in design patent CN305421528S. The clubhead often comprises two components: a conventional metal body (stainless steel) and a high-density metal weight (tungsten alloy). The weight is rectangular and is usually embedded in the bottom of the clubhead using a welding process (the bottom of the clubhead is the lower end of the clubhead when the shaft is placed vertically). The weight helps to shift the clubhead's center of gravity, increasing the swing stability and rotational inertia of the golf club.

[0003] Existing ball joint structures with counterweights, such as Figure 11 As shown, the counterweight welding process in its manufacturing process requires opening a placement groove on the bottom surface 100 of the ball head, inserting the counterweight 2 into the placement groove (the counterweight 2 and the placement groove are in clearance fit), then using welding rods of the same material as the ball head to weld and wrap the counterweight 2, thereby sealing the counterweight 2 in the placement groove, and finally grinding and polishing the welding surface to make the welding surface flush with the bottom surface 100 of the ball head and achieve the roughness required by the process.

[0004] The existing counterweight welding process described above has the following problems in practical use: 1. The welding area is large, and excessive welding heat during the welding process can easily cause the ball head to deform, reducing the product yield; 2. The welding area is large, requiring more welding rods; 3. The welding area is large, resulting in low welding efficiency; 4. The welding area is large, requiring more time for grinding and polishing after welding. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a golf ball head that can avoid welding deformation and its manufacturing method. It solves the problems of reduced product yield, reduced production efficiency and increased production costs caused by the large welding area of ​​the existing counterweight welding process.

[0006] The technical solution of this invention is as follows: a golf club head that can avoid welding deformation, comprising a club head body and a counterweight; the club head body is a one-piece cast component, with a bottom surface at one end, and a positioning pit A connected to the bottom surface inside the club head body, the positioning pit A comprising an expanding cavity A and a reducing hole A connected sequentially from the bottom surface; the counterweight comprises a large segment and a small segment connected sequentially, with a stepped surface A between the large segment and the small segment; the counterweight is entirely embedded in the positioning pit A, the large segment of the counterweight is located in the expanding cavity A and matches the shape of the expanding cavity A, the small segment of the counterweight extends into the reducing hole A, there is a gap between the small segment of the counterweight and the reducing hole A, and the end of the small segment of the counterweight is lower than the opening of the reducing hole A; the gap between the small segment of the counterweight and the reducing hole A, and the area between the end of the small segment of the counterweight and the opening of the reducing hole A, are filled with welding repair material, thereby enclosing the counterweight entirely in the positioning pit A.

[0007] A further technical solution of the present invention is that the small-sized segment of the counterweight is cylindrical.

[0008] A further technical solution of the present invention is that the counterweight is an integrally formed tungsten block.

[0009] A further technical solution of the present invention is that the main body of the ball head is a nickel-based alloy, 304 stainless steel, or 316 stainless steel.

[0010] A further technical solution of the present invention is that the welding material at the opening of the reduced diameter hole A of the ball head body is flush with the bottom surface of the ball head body.

[0011] The technical solution of the present invention is: a method for preparing the above-mentioned golf ball head that can avoid welding deformation, comprising the following steps:

[0012] S01, Assembly of wax pressing mold and counterweight;

[0013] S02, Prepare a ball-shaped wax mold with a counterweight attached;

[0014] S03, Remove the wax pressing mold;

[0015] S04, Prepare a spherical shell mold with a counterweight attached;

[0016] S05, Remove the wax model of the ball head;

[0017] S06, Prepare the ball head body connected with the counterweight;

[0018] S07, Remove the ball head shell mold;

[0019] S08, cutting of the exposed part of the counterweight and welding of the exposed window of the counterweight.

[0020] A further technical solution of the present invention is: the method for preparing the above-mentioned golf ball head that can avoid welding deformation, the detailed operation of each step is as follows:

[0021] S01, first prepare a counterweight and a wax pressing mold, then install the counterweight on the wax pressing mold to form a first assembly. The large-size section of the counterweight in the first assembly is exposed. The wax pressing mold includes a body A and a boss A. A stepped surface B is provided between the body A and the boss A. The boss A is fixedly connected to one side surface of the body A. The boss A has a first blind hole extending towards the body A. The small-size section of the counterweight is inserted into the first blind hole of the boss A of the wax pressing mold. The stepped surface A of the counterweight abuts against the end face of the boss A of the wax pressing mold.

[0022] S02, using the first assembly to press the adapted ball-shaped wax mold, a second assembly is obtained including the ball-shaped wax mold, the counterweight, and the wax pressing mold. The counterweight in the second assembly is enclosed between the wax pressing mold and the ball-shaped wax mold. The ball-shaped wax mold is provided with a positioning pit B that connects to its outer surface. The positioning pit B includes an expanding cavity B and a reducing hole B that are connected sequentially from far to near the outer surface. The ball-shaped wax mold encloses the large-sized section of the counterweight through the expanding cavity B, encloses the boss A of the wax pressing mold through the reducing hole B, and fits with the stepped surface B of the wax pressing mold through its outer surface.

[0023] S03, remove the wax mold from the second assembly to obtain a third assembly containing a ball-shaped wax mold and a counterweight. The small-sized end of the counterweight in the third assembly is exposed. An annular gap is formed between the small-sized end of the counterweight and the reduced-diameter hole B of the ball-shaped wax mold.

[0024] S04, apply slurry to the exposed surface of the third assembly, and wait for the slurry to solidify to form a fourth assembly including the ball-head shell mold and the third assembly. The counterweight in the fourth assembly is enclosed between the ball-head shell mold and the ball-head wax mold. The ball-head shell mold includes a body B and a boss B. The body B has a cavity for casting molten metal. The boss B is located inside the cavity of the body B and is fixedly connected to the cavity wall of the body B. The boss B has a second blind hole extending into the body B. The ball-head shell mold completely encloses the small segment of the counterweight through the second blind hole.

[0025] S05, after the ball head shell mold is dry and reaches the wet strength required for dewaxing, dewaxing is performed to remove the ball head wax mold from the fourth assembly, resulting in a fifth assembly containing the counterweight and the ball head shell mold. The large-size section of the counterweight in the fifth assembly is exposed in the cavity of the ball head shell mold.

[0026] S06, firstly, the fifth assembly is baked to harden and shape the ball head shell mold, then the target molten metal is poured into the cavity of the ball head shell mold. After the target molten metal cools and solidifies, a sixth assembly containing the ball head body and the fifth assembly is obtained. The counterweight in the sixth assembly is sealed between the ball head body and the ball head shell mold. The ball head body has a bottom surface, and the ball head body has a positioning pit A that connects to the bottom surface. The positioning pit A includes an expansion cavity A and a reduction hole A that are connected sequentially from far to near the bottom surface. The ball head body contains the large-size section of the counterweight through the expansion cavity A, contains the boss B of the ball head shell mold through the reduction hole A, and fits the cavity wall of the body B of the ball head shell mold through the bottom surface.

[0027] S07, Remove the ball head shell mold from the sixth assembly, clean the surface of the ball head body, and obtain the seventh assembly containing the counterweight and the ball head body. The small-sized end of the counterweight in the seventh assembly is exposed. An annular gap is formed between the small-sized end of the counterweight and the reduced-diameter hole A of the ball head body.

[0028] S08. First, cut off the small-sized end of the exposed counterweight block in the seventh assembly, ensuring that the end face of the small-sized end of the counterweight block after cutting is submerged below the opening of the reduced-diameter hole A of the ball head body. Then, use welding rods to repair the reduced-diameter hole A of the ball head body, so that the gap between the small-sized end of the counterweight block and the reduced-diameter hole A, as well as the area between the end of the small-sized end of the counterweight block and the opening of the reduced-diameter hole A, are filled with repair welding material. Finally, grind the repair welding material at the opening of the reduced-diameter hole A of the ball head body until it is flush with the bottom surface of the ball head body, thus obtaining a golf ball head that can avoid welding deformation.

[0029] A further technical solution of the present invention is: in step S06, the calcination temperature is 1000-1050℃ and the calcination time is 45-60min.

[0030] A further technical solution of the present invention is: in step S06, when the target molten metal is 304 stainless steel or 316 stainless steel, the casting temperature is 1600-1650℃, and when the target molten metal is a nickel-based alloy, the casting temperature is 1500-1550℃.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] By uniquely designing a counterweight consisting of two segments of different sizes and applying this uniquely designed counterweight to the entire manufacturing process of the golf ball head, the counterweight welding step in the manufacturing process is significantly reduced in size compared to existing counterweight welding processes. (The welding area is the exposed window area of ​​the counterweight, which is only slightly larger than the end face area of ​​the smaller segment and much smaller than the end face area of ​​the larger segment.) This results in the following beneficial technical effects:

[0033] I. Reduced welding heat during the welding process, preventing deformation of the golf ball head under excessive welding heat and improving product yield; II. Reduced the amount of welding rods used, lowering the production cost of the golf ball head; III. Improved welding efficiency, further reducing the production cost of the golf ball head; IV. Reduced the time spent on post-weld grinding and polishing, further lowering the production cost of the golf ball head.

[0034] The present invention will be further described below with reference to the figures and embodiments. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the main structure of the ball head;

[0037] Figure 3 This is a state diagram of step S01 in the preparation method of the present invention;

[0038] Figure 4 This is a state diagram of step S02 in the preparation method of the present invention;

[0039] Figure 5 This is a state diagram of step S03 in the preparation method of the present invention;

[0040] Figure 6 This is a state diagram of step S04 in the preparation method of the present invention;

[0041] Figure 7 This is a state diagram of step S05 in the preparation method of the present invention;

[0042] Figure 8 This is a state diagram of step S06 in the preparation method of the present invention;

[0043] Figure 9 This is a state diagram of step S07 in the preparation method of the present invention;

[0044] Figure 10 This is a state diagram of step S08 in the preparation method of the present invention;

[0045] Figure 11 This is a schematic diagram of an existing golf ball head with a counterweight.

[0046] Legend: Ball head bottom surface 100; Ball head body 1; Striking surface 11; Top surface 12; Bottom surface 13; Expanding cavity A141; Reducing hole A142; Counterweight 2; Large size section 21; Small size section 22; Welding material 3; Wax mold 4; Body A41; Boss A42; Ball head wax mold 5; Ball head shell mold 6; Body B61; Boss B62. Detailed Implementation

[0047] Example 1:

[0048] like Figure 1-10 As shown, a golf ball head designed to prevent welding deformation includes a head body 1 and a counterweight 2.

[0049] The ball head body 1 is a one-piece cast component. A striking surface 11 is provided on one side of the ball head body 1. The upper and lower ends of the striking surface 11 are connected to a top surface 12 and a bottom surface 13, respectively. The ball head body 1 has a positioning pit A that connects to the bottom surface 13. The positioning pit A includes an expanding cavity A141 and a narrowing hole A142, connected sequentially from the bottom surface. The counterweight 2 includes a large-size segment 21 and a small-size segment 22 connected sequentially. A stepped surface A is provided between the large-size segment 21 and the small-size segment 22. The counterweight 2 is entirely embedded in the positioning pit A. The large-size segment 21 of the counterweight 2 is located in the expanding cavity A141 and conforms to the shape of the expanding cavity A141. The small-size segment of the counterweight 2 extends into the narrowing hole A142. There is a gap between the small-size segment 22 of the counterweight 2 and the narrowing hole A142. The end of the small-size segment 22 of the counterweight 2 is lower than the opening of the narrowing hole A142. The gap between the small section 22 of the counterweight 2 and the reduced diameter hole A142, as well as the area between the end of the small section 22 of the counterweight 2 and the opening of the reduced diameter hole A142, is filled with welding material 3, thereby enclosing the counterweight 2 entirely in the positioning pit A.

[0050] Preferably, the smaller segment 22 of the counterweight 2 is cylindrical.

[0051] Preferably, the counterweight 2 is a tungsten block formed in one piece.

[0052] Preferably, the ball head body 1 is made of nickel-based alloy, 304 stainless steel, or 316 stainless steel.

[0053] Preferably, the welding material 3 located at the opening of the reduced diameter hole A142 of the ball head body 1 is flush with the bottom surface 13 of the ball head body 1.

[0054] The method for preparing the above-mentioned golf ball head that avoids welding deformation includes the following steps:

[0055] S01, Assembly of wax pressing mold and counterweight: First, prepare counterweight 2 and wax pressing mold 4, then install counterweight 2 on wax pressing mold 4 to form a first assembly. The large-size segment 21 of counterweight 2 in the first assembly is exposed. Wax pressing mold 4 includes body A41 and boss A42. A stepped surface B is provided between body A41 and boss A42. Boss A42 is fixedly connected to one side surface of body A41. A first blind hole extending towards body A41 is provided on boss A42. The small-size segment 22 of counterweight 2 is inserted into the first blind hole of boss A42 of wax pressing mold 4. The stepped surface A of counterweight 2 abuts against the end face of boss A42 of wax pressing mold 4.

[0056] S02, Prepare a ball-shaped wax mold with a counterweight connected to it: Press the adapted ball-shaped wax mold 5 using the first assembly to obtain a second assembly containing the ball-shaped wax mold 5, the counterweight 2, and the wax pressing mold 4. The counterweight 2 in the second assembly is enclosed between the wax pressing mold 4 and the ball-shaped wax mold 5. The ball-shaped wax mold 5 is provided with a positioning pit B that connects to its outer surface. The positioning pit B includes an expanding cavity B and a reducing hole B that are connected sequentially from far to near the outer surface. The ball-shaped wax mold 5 encloses the large-size section 21 of the counterweight 2 through the expanding cavity B, encloses the boss A42 of the wax pressing mold 4 through the reducing hole B, and fits the stepped surface B of the wax pressing mold 4 through its outer surface.

[0057] S03, Remove the wax mold: Remove the wax mold 4 from the second assembly to obtain a third assembly containing a ball-shaped wax mold 5 and a counterweight 2. The end of the small-sized segment 22 of the counterweight 2 in the third assembly is exposed. A cylindrical gap is formed between the small-sized segment 22 of the counterweight 2 and the reduced-diameter hole B of the ball-shaped wax mold 5.

[0058] S04, Preparation of a ball-shaped shell mold with a counterweight connected to it: Apply slurry to the exposed surface of the third assembly, and wait for the slurry to solidify to form a fourth assembly containing the ball-shaped shell mold 6 and the third assembly. The counterweight 2 in the fourth assembly is enclosed between the ball-shaped shell mold 6 and the ball-shaped wax mold 5. The ball-shaped shell mold 6 includes a body B61 and a boss B62. The body B61 has a cavity (not shown in the figure) for casting molten metal. The boss B62 is located inside the cavity of the body B61 and is fixedly connected to the cavity wall of the body B61. The boss B62 has a second blind hole extending into the body B61. The ball-shaped shell mold 6 completely encloses the small segment 22 of the counterweight 2 through the second blind hole.

[0059] S05, Remove the ball head wax mold: After the ball head shell mold 6 has dried and reached the wet strength required for dewaxing, dewaxing is performed to remove the ball head wax mold 5 from the fourth assembly, resulting in a fifth assembly containing the counterweight 2 and the ball head shell mold 6. The large-size segment 21 of the counterweight 2 in the fifth assembly is entirely exposed in the cavity of the ball head shell mold 6.

[0060] S06, Preparation of the ball head body connected with the counterweight: First, the fifth assembly is baked to harden and shape the ball head shell mold 6. Then, the target molten metal is poured into the cavity of the ball head shell mold 6. After the target molten metal cools and solidifies, a sixth assembly containing the ball head body 1 and the fifth assembly is obtained. The counterweight 2 in the sixth assembly is sealed between the ball head body 1 and the ball head shell mold 6. The ball head body 1 is provided with a bottom surface 13. The ball head body 1 is provided with a positioning pit A that connects to the bottom surface 13. The positioning pit A includes an expansion cavity A141 and a reduction hole A142 that are connected sequentially from far to near the bottom surface 13. The ball head body 1 encloses the large-size section 21 of the counterweight 2 through the expansion cavity A141 and the boss B62 of the ball head shell mold 6 through the reduction hole A142. The bottom surface 13 is attached to the cavity wall of the body B61 of the ball head shell mold 6.

[0061] S07, Remove the ball head shell mold: Remove the ball head shell mold 6 from the sixth assembly, clean the surface of the ball head body 1, and obtain the seventh assembly containing the counterweight 2 and the ball head body 1. The end of the small-sized segment 22 of the counterweight 2 in the seventh assembly is exposed. A cylindrical gap is formed between the small-sized segment 22 of the counterweight 2 and the reduced-diameter hole A142 of the ball head body 1.

[0062] S08, Cutting the exposed part of the counterweight and repairing the exposed window of the counterweight: First, cut off the end of the small-sized segment 22 of the counterweight 2 exposed in the seventh assembly, ensuring that the end face of the small-sized segment 22 of the counterweight 2 after cutting is submerged below the opening of the reduced diameter hole A142 of the ball head body 1. Then, use welding rod to repair the reduced diameter hole A of the ball head body, so that the gap between the small-sized segment of the counterweight and the reduced diameter hole A, as well as the area between the end of the small-sized segment of the counterweight and the opening of the reduced diameter hole A, are filled with repair welding material 3. Finally, grind the repair welding material at the opening of the reduced diameter hole A of the ball head body until it is flush with the bottom surface of the ball head body, thus obtaining a golf ball head that can avoid welding deformation.

[0063] Preferably, in step S06, the calcination temperature is 1000-1050℃ and the calcination time is 45-60 min. Preferably, in step S06, when the target molten metal is 304 stainless steel or 316 stainless steel, the casting temperature is 1600-1650℃, and when the target molten metal is a nickel-based alloy, the casting temperature is 1500-1550℃.

Claims

1. A golf club head that avoids welding distortion, characterized by: The device includes a ball head body and a counterweight. The ball head body is a one-piece cast component with a bottom surface at one end. A positioning pit A, connected to the bottom surface, is located inside the ball head body. The positioning pit A includes an expanding cavity A and a narrowing hole A, connected sequentially from the bottom surface. The counterweight includes a large segment and a small segment connected sequentially, with a stepped surface A between them. The counterweight is entirely embedded in the positioning pit A. The large segment of the counterweight is located in the expanding cavity A and conforms to its shape. The small segment of the counterweight extends into the narrowing hole A, with a gap between it and the narrowing hole A. The end of the small segment is lower than the opening of the narrowing hole A. Welding material is filled in the gap between the small segment and the narrowing hole A, and in the area between the end of the small segment and the opening of the narrowing hole A, thus completely enclosing the counterweight in the positioning pit A.

2. The deformity-avoiding golf club head of claim 1, wherein: The smaller sections of the counterweight are cylindrical.

3. The golf ball head as described in claim 2, characterized in that: The counterweight is a tungsten block formed in one piece.

4. The golf ball head as described in claim 3, characterized in that: The main body of the ball head is made of nickel-based alloy, 304 stainless steel, or 316 stainless steel.

5. The golf ball head as described in claim 4, characterized in that: The welding material at the opening of the reduced-diameter hole A on the main body of the ball head is flush with the bottom surface of the main body of the ball head.

6. A method for preparing a golf ball head that can avoid welding deformation as described in any one of claims 1-5, characterized in that, step as follows: S01, Assembly of wax pressing mold and counterweight; S02, Prepare a ball-shaped wax mold with a counterweight attached; S03, Remove the wax pressing mold; S04, Prepare a spherical shell mold with a counterweight attached; S05, Remove the wax model of the ball head; S06, Prepare the ball head body connected with the counterweight; S07, Remove the ball head shell mold; S08, cutting of the exposed part of the counterweight and welding of the exposed window of the counterweight.

7. The method for preparing a golf ball head that avoids welding deformation as described in claim 6, characterized in that: The detailed steps are as follows: S01, first prepare a counterweight and a wax pressing mold, then install the counterweight on the wax pressing mold to form a first assembly. The large-size section of the counterweight in the first assembly is exposed. The wax pressing mold includes a body A and a boss A. A stepped surface B is provided between the body A and the boss A. The boss A is fixedly connected to one side surface of the body A. The boss A has a first blind hole extending towards the body A. The small-size section of the counterweight is inserted into the first blind hole of the boss A of the wax pressing mold. The stepped surface A of the counterweight abuts against the end face of the boss A of the wax pressing mold. S02, using the first assembly to press the adapted ball-shaped wax mold, a second assembly is obtained including the ball-shaped wax mold, the counterweight, and the wax pressing mold. The counterweight in the second assembly is enclosed between the wax pressing mold and the ball-shaped wax mold. The ball-shaped wax mold is provided with a positioning pit B that connects to its outer surface. The positioning pit B includes an expanding cavity B and a reducing hole B that are connected sequentially from far to near the outer surface. The ball-shaped wax mold encloses the large-sized section of the counterweight through the expanding cavity B, encloses the boss A of the wax pressing mold through the reducing hole B, and fits with the stepped surface B of the wax pressing mold through its outer surface. S03, remove the wax mold from the second assembly to obtain a third assembly containing a ball-shaped wax mold and a counterweight. The small-sized end of the counterweight in the third assembly is exposed. An annular gap is formed between the small-sized end of the counterweight and the reduced-diameter hole B of the ball-shaped wax mold. S04, apply slurry to the exposed surface of the third assembly, and wait for the slurry to solidify to form a fourth assembly including the ball-head shell mold and the third assembly. The counterweight in the fourth assembly is enclosed between the ball-head shell mold and the ball-head wax mold. The ball-head shell mold includes a body B and a boss B. The body B has a cavity for casting molten metal. The boss B is located inside the cavity of the body B and is fixedly connected to the cavity wall of the body B. The boss B has a second blind hole extending into the body B. The ball-head shell mold completely encloses the small segment of the counterweight through the second blind hole. S05, after the ball head shell mold is dry and reaches the wet strength required for dewaxing, dewaxing is performed to remove the ball head wax mold from the fourth assembly, resulting in a fifth assembly containing the counterweight and the ball head shell mold. The large-size section of the counterweight in the fifth assembly is exposed in the cavity of the ball head shell mold. S06, firstly, the fifth assembly is baked to harden and shape the ball head shell mold, then the target molten metal is poured into the cavity of the ball head shell mold. After the target molten metal cools and solidifies, a sixth assembly containing the ball head body and the fifth assembly is obtained. The counterweight in the sixth assembly is sealed between the ball head body and the ball head shell mold. The ball head body has a bottom surface, and the ball head body has a positioning pit A that connects to the bottom surface. The positioning pit A includes an expansion cavity A and a reduction hole A that are connected sequentially from far to near the bottom surface. The ball head body contains the large-size section of the counterweight through the expansion cavity A, contains the boss B of the ball head shell mold through the reduction hole A, and fits the cavity wall of the body B of the ball head shell mold through the bottom surface. S07, Remove the ball head shell mold from the sixth assembly, clean the surface of the ball head body, and obtain the seventh assembly containing the counterweight and the ball head body. The small-sized end of the counterweight in the seventh assembly is exposed. An annular gap is formed between the small-sized end of the counterweight and the reduced-diameter hole A of the ball head body. S08. First, cut off the small-sized end of the exposed counterweight block in the seventh assembly, ensuring that the end face of the small-sized end of the counterweight block after cutting is submerged below the opening of the reduced-diameter hole A of the ball head body. Then, use welding rods to repair the reduced-diameter hole A of the ball head body, so that the gap between the small-sized end of the counterweight block and the reduced-diameter hole A, as well as the area between the end of the small-sized end of the counterweight block and the opening of the reduced-diameter hole A, are filled with repair welding material. Finally, grind the repair welding material at the opening of the reduced-diameter hole A of the ball head body until it is flush with the bottom surface of the ball head body, thus obtaining a golf ball head that can avoid welding deformation.

8. The method for preparing a golf ball head that avoids welding deformation as described in claim 7, characterized in that: In step S06, the calcination temperature is 1000-1050℃ and the calcination time is 45-60min.

9. The method for preparing a golf ball that avoids welding deformation as described in claim 8, characterized in that: In step S06, when the target molten metal is 304 stainless steel or 316 stainless steel, the casting temperature is 1600-1650℃, and when the target molten metal is a nickel-based alloy, the casting temperature is 1500-1550℃.

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