CN1207072C - Weight for golf club head and manufacturing method thereof - Google Patents

Abstract

A weight block of a golf club head and a manufacturing method thereof mainly comprise the following steps: firstly, adding nickel particles with lower melting points into a high-temperature melting furnace for melting, and adding pure iron after the nickel particles are completely melted to obtain a melted alloy of the nickel particles and the pure iron; then, the melting temperature of ferrotungsten is further reduced by utilizing the melting alloy of the nickel particles and the pure iron, and the ferrotungsten is promoted to be smoothly melted in the melting furnace without generating tungsten precipitation; then, after ferrotungsten is completely melted, adding the returning excess material, and finally adding ferrosilicon, ferromanganese and ferroniobium; the weight ratio of each component is nickel: 24-50%, iron: 24-50%, tungsten: 20-30%, silicon: 1.0% or less, manganese: less than 1.0 percent and less than 0.5 percent of niobium to prepare the fused tungsten iron nickel alloy which meets the preset specific gravity; pouring the molten ferrotungsten nickel alloy into a preheating mould with a preset shape, a precise pattern and characters to precisely cast a balancing weight of the golf club head; and demolding the mold, trimming to obtain the balancing weight, and recovering the rest leftover material to obtain the re-melting leftover material for the next precision casting.

Description

Weight for golf club head and manufacturing method thereof

technical field

The present invention relates to a counterweight of a golf club head and a manufacturing method thereof, in particular to a tungsten-iron-nickel alloy counterweight of a golf club head by using a precision casting process with a specific metal melting sequence and composition ratio , in order to improve the disadvantages of tungsten-iron-nickel alloy weights made by traditional powder metallurgy, which are easy to break and difficult to die-cast or engrave precise patterns on the weights.

Background technique

Referring to Fig. 1, it is a manufacturing method of a traditional golf club head weight block alloy, which usually refers to processing many kinds of metals with high specific gravity and high weldability by using traditional powder metallurgy (powder metallurgy) process to obtain Alloys suitable for weights of golf club heads, especially tungsten-iron-nickel alloys containing metals such as tungsten (19.30g/cm ³ ), iron (7.8g/cm ³ ) and nickel (8.9g/cm ³ ), Because of its many advantages such as heavy weight, small size and high hardness, it is widely used in the industry. Usually, the traditional powder metallurgy process mainly includes the following steps:

1. Mix tungsten, iron, nickel and other metal powders according to the preset composition ratio;

2. Squeeze the above powder to form a compact sample;

3. Sinter the above compacted samples at high temperature (and vacuum);

4. Apply multiple processing and heat treatments to the compacted sample to produce a weight for the golf club head.

Its main flaws are:

The cost of molding is high, the elongation of the finished product is low, the process time is long, and it is impossible to directly die-cast precise patterns, characters, models and trademarks. The reason is mostly because the tungsten-iron-nickel weight alloy contains tungsten metal with extremely high hardness, so the tungsten alloy weight block made by powder metallurgy cannot be made into a delicate trademark (logo) or pattern, but needs to be as the current After sintering, engraving is performed to produce exquisite trademarks (logos) or patterns, so the process time of the powder metallurgy will be long and the production efficiency will be low.

Although the industry continues to try to use the traditional precision casting process to manufacture tungsten-iron-nickel alloy weights for golf club heads to overcome the shortcomings of the powder metallurgy process, such as the inability to directly die-cast precise patterns on compacted samples, but due to the The precision casting process often cannot overcome the problem that tungsten with a high melting point will produce tungsten precipitation during the melting process, so the precision casting process has lower cost, higher elongation of the finished product, shorter process time and direct casting of precision castings. Advantages such as patterns still cannot be applied to tungsten-iron-nickel weight alloys for golf club heads.

Contents of the invention

In view of this, the present invention improves the above-mentioned shortcomings, which mainly uses the investment casting process to manufacture the tungsten-iron-nickel alloy weight block, and uses the specific metal melting sequence and composition ratio to overcome the tungsten precipitation problem generated by the above-mentioned traditional investment casting process, that is Sequentially melt nickel particles, pure iron, ferrotungsten, refurbishment residue, ferrosilicon, ferromanganese and ferroniobium at a high temperature above 1450°C in a predetermined proportion. After the above molten alloy is poured into the preheated mold, The balance weight of the golf club head is precision cast into tungsten-iron-nickel alloy, so that the present invention has the effects of low manufacturing cost, high elongation of the finished product, short manufacturing process time and direct casting of precise patterns and characters.

The main purpose of the present invention is to provide a counterweight for a golf club head and a manufacturing method thereof, in which nickel grains, pure iron, ferrotungsten, refurbishment residues, ferrosilicon Ferro-manganese, ferro-niobium, and ferro-niobium are completely melted at high temperature in sequence, so that the tungsten-iron-nickel alloy weight of the golf club head can be precision cast, so as to reduce the manufacturing cost of the weight, increase the elongation of the finished product, shorten the process time and directly The purpose of the casting method is to form precise patterns and characters on the counterweight.

The object of the present invention is achieved like this: a kind of counterweight of golf club head, it is characterized in that: it is the structure that the alloy metal precision casting of specific ratio is molded integrally, wherein the weight percent of each main component is respectively nickel 24%-50%, iron 24%-50%, tungsten 20%-35%, silicon 1.0% or less, manganese 1.0% or less and niobium 0.5% or less.

The weight ratio of trace doping components is also contained below 3.0% of copper and below 0.1% of carbon. The melting point range of the alloy metal is between 1400-1500°C.

The present invention also provides a method for manufacturing a counterweight of a golf club head, which is characterized in that it includes the following steps:

(1) In the high-temperature melting furnace, at first the nickel particles with a lower melting point are added to melt first, and then pure iron is added after the nickel particles are completely melted to obtain a molten alloy of nickel particles and pure iron; then, the above-mentioned nickel particles and The melting alloy of pure iron further reduces the melting temperature of ferro-tungsten, and promotes the smooth melting of ferro-tungsten in the melting furnace without tungsten precipitation; then, when ferro-tungsten is completely melted, add the rest of the furnace, and finally add silicon Iron, ferromanganese and ferro-niobium; the weight ratio of each component is maintained at nickel: iron: tungsten: silicon: manganese: niobium = 24%-50%: 24%-50%: 20%-35%: 1.0% or less : less than 1.0%: less than 0.5%, in order to produce a molten tungsten-iron-nickel alloy that meets the preset specific gravity;

(2) Pouring the melted tungsten-iron-nickel alloy into a preheated mold with a predetermined shape, precise patterns and characters, and casting it into a counterweight for golf clubs;

(3) After the mold is demoulded and edge trimmed, it is manufactured into a counterweight for golf clubs, and the remaining sapwood is recycled to be used as the rest of the furnace for the next precision casting.

Each furnace of this melting furnace melts 70 kg of molten alloy. The temperature of the melting furnace is between 1450°C and 1750°C. The nickel grains, pure iron, ferrotungsten, residuum, ferrosilicon, ferromanganese and ferroniobium are in the shape of irregular fine grains. Sampling and measuring the specific gravity after the tungsten-iron-nickel alloy is completely melted is consistent with the preset specific gravity value. The specific gravity of the tungsten-iron-nickel alloy is between 9.5-11.0 g/cm ³ . The melting point range of the tungsten-iron-nickel alloy is between 1400-1500°C. The composition also contains a small amount of doping components whose weight ratio is respectively less than 3.0% of copper and less than 0.1% of carbon. The preheating temperature of the mold is between 950-1300° C., and the holding time is between 30-60 minutes.

A detailed description will be given below in combination with preferred embodiments and accompanying drawings.

Description of drawings

FIG. 1 is a schematic block diagram of a conventional manufacturing method.

Fig. 2 is a schematic block diagram of the process of the manufacturing method of the present invention.

Detailed ways

The manufacturing method of the counterweight of the golf club head of the present invention comprises the following steps:

Add nickel grains, pure iron, ferrotungsten, refurbishment residue, ferrosilicon, ferromanganese and ferroniobium into the high-temperature melting furnace in sequence, so that the weight ratio of nickel: iron: tungsten: silicon: manganese: niobium is maintained at 24%- 50%: 24%-50%: 20%-30%: less than 1.0%: less than 1.0%: less than 0.5%, so as to make molten tungsten-iron-nickel alloy that meets the preset specific gravity;

The melted tungsten-iron-nickel alloy is poured into a preheated mold with a predetermined shape, precise pattern and text, and precision cast into a weight for golf clubs;

After demolding the mold and trimming the edges, it is manufactured into a golf club counterweight, and the remaining sapwood is recycled to be used as the rest of the furnace for the next precision casting.

Referring to Fig. 2, the first step of the manufacturing method of the counterweight of the golf club head of the present invention is to add nickel grains, pure iron, ferrotungsten, refurbishment residue, ferrosilicon, ferromanganese and ferroniobium into high temperature in sequence. In the melting furnace, the weight ratio of nickel: iron: tungsten: silicon: manganese; niobium is maintained at 24%-50%: 24%-50%: 20%-35%: less than 1.0%: less than 1.0%: less than 0.5% , in order to produce molten tungsten-iron-nickel alloys that meet the preset specific gravity.

In order to overcome the problem that the tungsten precipitation phenomenon often occurs when the weight of the golf club head made of tungsten-iron-nickel alloy is produced by the traditional precision casting process, resulting in a low product quality rate. Therefore, the present invention uses a specific metal melting sequence and composition ratio Perform precision casting process. The specific metal melting sequence mentioned above mainly refers to adding irregular fine-grained nickel particles, pure iron, ferro-tungsten, refurbishment residue, ferrosilicon, ferromanganese and ferro-niobium into the high-temperature melting furnace above 1450°C in sequence. Taking the preferred embodiment of the present invention as an example, it first melts the nickel particles with a lower melting point at a high temperature above 1450°C, and then adds pure iron after the nickel particles are completely melted to obtain the melting of nickel particles and pure iron. alloy; then, use the melting alloy of nickel particles and pure iron to further reduce the melting temperature of ferro-tungsten, and promote the smooth melting of ferro-tungsten in the melting furnace without tungsten precipitation; then, when ferro-tungsten is completely melted, then Add remelting residue, which refers to the reclaimed side material remaining after the weight block mold is demoulded and trimmed after the tungsten-iron-nickel alloy weight block of the golf club head is manufactured , and finally add ferrosilicon, ferromanganese and ferroniobium in order to improve the fluidity and auxiliary degassing effect during casting. As shown in table 1, when the present invention finishes the melting of above-mentioned new material and refurbishment surplus material, nickel: iron: tungsten: silicon: manganese: the weight ratio of niobium is maintained at 24%-50%: 24%-50%: 20%-35%: less than 1.0%: less than 1.0%: less than 0.5%, and the weight ratios of other doping components such as copper and carbon are maintained at less than 3.0% and less than 0.1% respectively

Table 1 Comparison table of metal composition weight percentage between investment casting and traditional powder metallurgy Specification Tungsten W Iron FE Nickel NI Silicon Si Manganese Mn Niobium Nb Copper Cu Carbon C Cast W-Fe-Ni 20-35 30-50 30-50 1.0 1.0 0.5 3.0 0.1 Powder metallurgy D12 35 13 52 - - - - -

In addition, the melting furnace is a special melting furnace for tungsten-iron-nickel alloys. Each furnace is preferably capable of melting 70 kg of molten alloy, and it should also prevent harmful welding elements such as carbon, phosphorus, and sulfur from entering the furnace. polluting function. And it is better to slowly add various fine-grained and irregular ingredients into the melting furnace in a small amount and multiple times, so as to avoid the sudden bridging phenomenon due to a large amount of addition (the ingredients are not completely melted and bonded into agglomerates) , resulting in voids or bubbles inside the melting furnace), which increases the risk of the melting furnace.

The preset specific gravity of the tungsten-iron-nickel alloy used to manufacture the counterweight of the golf club head varies according to the golf clubs of different uses, but its specific gravity is preferably preset at 9.5-11.0g/ cm ³ , and its melting point is around 1450°C (2642°F).

Referring to Fig. 2, the second step of the manufacturing method of the counterweight of the golf club head of the present invention is to pour the melted tungsten-iron-nickel alloy into a preheated mold with a predetermined shape, precise patterns and characters, to precisely Weights cast into golf clubs. When the above-mentioned molten tungsten-iron-nickel alloy is prepared according to the specific metal melting sequence and composition ratio, and the specific gravity measured by sampling meets the preset specific gravity value, it can be directly poured after degassing and slag removal before being released from the furnace. Into the mold for precision casting. The preheating temperature of the mold before injecting the molten liquid is preferably set at 950-1300°C, and the holding time is set at 30-60mins.

The precision casting mold of the present invention can not only form the predetermined shape of the golf ball weight, but also can be processed in advance to form more precise patterns, characters, models and/or trademarks, so the golf clubs made by the method of the present invention The counterweight of the head is directly formed with patterns, characters, models and/or trademarks through precision casting, so it can avoid the difficulty that occurs when the patterns, characters, models and/or trademarks are processed by mechanical engraving in the traditional powder metallurgy process. Disadvantages such as precision machining, long process time and low production efficiency. As shown in Table 2, the present invention uses the precision casting process to manufacture the weight of the golf club head, which also has many advantages such as low manufacturing cost, short manufacturing process time and high elongation of the finished product.

Table 2 Comparison table of various mechanical properties between precision casting of the present invention and traditional powder metallurgy material name tensile strengthtensile-strength(Ksi) Yield strength yield-strength(Ksi) elongation (%in2inches) Specific strength specificstrength(Ksi/lb/in3) hardnesshardness Cast W-Fe-Ni 75-90 45-55 15-30 206-248 HRB75-95 Powder metallurgy D12 70 55 5 162 HRB80-95

Referring to Fig. 2, the third step of the manufacturing method of the counterweight of the golf club head of the present invention is to reclaim the remaining sap material after the mold is demoulded and trimmed, so as to be used as the rest of the furnace for the next precision casting. When the melt of tungsten-iron-nickel alloy is poured into the mold of precision casting, the mold is placed on the conveyor belt for water cooling, and then the shell is shaken under low pressure, and then trimmed, and the remaining The sapwood is recovered and made into a fine and irregular shape for use as the rest of the furnace for the next precision casting.

With reference to Fig. 1-Fig. 2, the counterweight of the golf club head of the present invention in Fig. 2 and its manufacturing method utilize specific metal melting sequence and composition ratio to overcome the problem of tungsten precipitation produced by the above-mentioned traditional precision casting process, It sequentially melts nickel grains, pure iron, tungsten iron, remanufactured material, ferrosilicon, ferromanganese and ferroniobium at high temperature, so that the golf club head with precise patterns and characters can be made of tungsten-iron-nickel alloy. heavy block.

Compared with the manufacturing method of the traditional golf club head counterweight shown in Figure 1, the powder metallurgy process has the advantages of high molding cost, low elongation of the finished product, long process time, and the inability to directly die-cast precise patterns, characters, models and trademarks, but many follow-up engraving processes are required. It is obvious that the manufacturing method of the weight of the golf club head of the present invention has the advantages of low manufacturing cost, high elongation of the finished product, short process time and direct casting of precise patterns and patterns. The power of words.

Although the present invention has been disclosed with preferred embodiments, it is not intended to limit the present invention. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention belong to the present invention. within the scope of protection.

Claims (12)

1, a kind of balancing weight of glof club head, it is characterized in that: it is in regular turn with the integrated structure of alloying metal hot investment casting of special ratios, and wherein the percentage by weight of each main constituent is respectively nickel 24%-50%, iron 24%-50%, tungsten 20%-35%, silicon below 1.0%, manganese below 1.0% and niobium below 0.5%.

2, the balancing weight of glof club head according to claim 1 is characterized in that: the weight proportion that it also includes trace doped composition is respectively copper below 3.0% and carbon below 0.1%.

3, according to the balancing weight of the described glof club head of claim 1, it is characterized in that: the melting range of this alloying metal is between 1400-1500 ℃.

4, a kind of manufacture method of balancing weight of glof club head, it is characterized in that: it comprises following steps:

(1) at first is to add the fusion of going ahead of the rest of the lower nickel shot of fusing point in the high-temperature digestion stove, treats then to add pure iron after the complete melting of nickel shot, to obtain the fusion alloy of nickel shot and pure iron; Then, utilize the fusion alloy of above-mentioned nickel shot and pure iron further to reduce the fusion temperature of ferrotungsten, and impel ferrotungsten to be melted in smoothly in this calciner, and do not produce the tungsten precipitation; Subsequently, after the complete fusion of ferrotungsten, add again and melt down clout, add ferrosilicon, ferromanganese and ferro-niobium at last again; The weight proportion of its each composition maintains nickel: iron: tungsten: silicon: manganese: niobium=24%-50%: 24%-50%: 20%-35%: below 1.0%: below 1.0%: below 0.5%, to make the fusion tammite nickel alloy that meets default proportion;

(2) this tammite nickel alloy cast of fusion is entered have reservation shape, in the preheated mold of precise pattern and literal, become the balancing weight of golf clubs with hot investment casting;

(3) with after mold releasability, the side cut, manufacture the balancing weight of golf clubs, remaining sapwood reclaims, with the clout that melts down as next hot investment casting.

5, the manufacture method of the balancing weight of glof club head according to claim 4 is characterized in that: the every stove of this calciner is the molten alloy of 70 kilograms of fusions.

6, the manufacture method of the balancing weight of glof club head according to claim 4 is characterized in that: the temperature of this calciner is between 1450 ℃-1750 ℃.

7, the manufacture method of the balancing weight of glof club head according to claim 4 is characterized in that: this nickel shot, pure iron, ferrotungsten, to melt down clout, ferrosilicon, ferromanganese and ferro-niobium be that to be particulate irregular.

8, the manufacture method of the balancing weight of glof club head according to claim 4 is characterized in that: sampling and measuring proportion is to meet default rate of specific gravity after the complete fusion of this tammite nickel alloy.

9, the manufacture method of the balancing weight of glof club head according to claim 8 is characterized in that: the proportion of this tammite nickel alloy is between 9.5-11.0g/cm ³Between.

10, the manufacture method of the balancing weight of glof club head according to claim 4 is characterized in that: the melting range of this tammite nickel alloy is between 1400-1500 ℃.

11, the manufacture method of the balancing weight of glof club head according to claim 4 is characterized in that: the weight proportion that also includes trace doped composition in this constituent is respectively copper and reaches carbon below 3.0% below 0.1%.

12, the manufacture method of the balancing weight of glof club head according to claim 4 is characterized in that; The preheat temperature of this mould is between 950-1300 ℃, and its retention time is between 30-60 minute.

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