公开(公告)号：US08827833B2

公开(公告)日：2014-09-09

申请号：US13773107

申请日：2013-02-21

Applicant: K.K. Endo Seisakusho

Inventor： Junichi Amano ,  Toru Tamaki

IPC: A63B53/04 ,  B41M5/24

CPC classification number: A63B53/04 ,  A63B53/047 ,  A63B60/00 ,  A63B2053/0445 ,  A63B2225/60 ,  B41M5/24

Abstract: There is provided a golf club head capable of reliably preventing a backspin rate from varying in rainfall. A plurality of fine grooves are formed on a face surface 2. When observing a cross-sectional surface perpendicular to the face surface 2 involving a vertical line passing through the center G of gravity of the golf club head 1 with the golf club head 1 set at preset loft and lie angles, an average width of the fine grooves 4 in the cross-sectional surface is 100 μm or less and an average pitch thereof in the cross-sectional surface is 100 μm or less. Hence, the discharge of water can be accelerated by a capillary phenomenon, making it possible to reliably prevent a backspin rate of a golf ball from varying in rainfall.

Abstract translation: 提供了一种可以可靠地防止降雨量变化的后倾率的高尔夫球杆头。 在表面2上形成多个细槽。当观察到垂直于表面2的横截面垂直于穿过高尔夫球杆头1的重心中心G的垂直线时，高尔夫球杆头1设置 在预定的倾斜角度和倾斜角度下，细沟4的横截面中的平均宽度为100μm以下，截面的平均间距为100μm以下。 因此，可以通过毛细管现象来加速水的排出，从而可以可靠地防止高尔夫球的回转速度在降雨中变化。

公开(公告)号：US08911303B2

公开(公告)日：2014-12-16

申请号：US13684861

申请日：2012-11-26

Applicant: K.K. Endo Seisakusho

Inventor： Tomoyuki Sakai ,  Junichi Amano ,  Masaru Kawauchi

IPC: A63B53/04 ,  B21K17/00 ,  B21J5/06 ,  B21K23/00

CPC classification number: A63B53/047 ,  A63B2209/00 ,  B21J5/06 ,  B21K17/00 ,  B21K23/00

Abstract: The present invention provides a golf club improved in ball hitting sound and ball hitting feeling and its manufacturing method. First, low-carbon steel is subjected to press processing of hot forging to form portions of irregularity on the face on a side of a hitting surface. Then, when there are projecting portions in the portions of irregularity, only the projecting portions are subjected to press processing of cold forging to crush the projecting portions to be flat. Then, the surface is slightly smoothed by machining to be flat and crystal grains at the portions of irregularity and the area therearound are pressed to be fined, thereby enhancing the hardness and forming fiber flows parallel to the hitting surface. A part of the hardened face becomes harder than the hardness of a base material before press processing by 10% or more within a range of 1 mm in a depth.

Abstract translation: 本发明提供一种改进了击球声和球击感的高尔夫球杆及其制造方法。 首先，对低温钢进行热锻的冲压加工，以在击打面的一侧的面上形成不规则的部分。 然后，当在凹凸部分中存在突出部分时，仅对突出部分进行冷锻的冲压加工，以将突出部分压扁以使其平坦。 然后，通过机械加工平坦化而使表面稍微平滑，并且在不规则部分处的晶粒和其周围的区域被压制成精细化，从而提高硬度并形成平行于击打面的纤维流。 硬化面的一部分在深度为1mm以下的压延加工10％以上的基材的硬度变得更硬。