The utility model discloses a hollow combined drill bit, which comprises a drill bit and a retaining wall, the drill bit center is provided with a through drill bit middle hole, the retaining wall sleeve is arranged outside the drill bit, the drill bit cutting part at the bottom of the drill bit extends out of the bottom of the retaining wall, the bottom of the retaining wall is provided with the retaining wall cutting part, the outer side of the retaining wall upper part is also provided with a hollow bearing bush, both ends of the hollow bearing bush are matched with the outer side of the retaining wall, and the upper part of the retaining wall is provided with a hollow bearing bush The wall protecting holes are arranged along the circumference of the wall protecting. The wall protecting holes are located in the cutting fluid recovery groove formed between the hollow part of the hollow bearing bush and the outside of the wall protecting. The wall protecting holes are located at the lower part of the cutting fluid recovery groove. The upper part of the cutting fluid recovery groove is provided with a cutting fluid outlet. The top of the hollow bearing bush is provided with a fixed bayonet of the bearing bush. The fixed bayonet of the bearing bush is connected with the fixed part. The top of the wall protecting A wall protecting bayonet is arranged, which is connected with a rotating part, a bit bayonet is arranged on the top of the drill bit, the bit bayonet is connected with another rotating part, and the wall protecting is opposite to the rotating direction of the drill bit.
【技术实现步骤摘要】
一种空心组合钻头
本技术涉及机械切削加工设备领域,尤其涉及一种空心组合钻头。
技术介绍
目前在小深孔加工范畴,枪钻几乎是最有效的刀具,长径比越大,优越性越显著,而且连续进给,不需要中途退刀排屑,但是枪钻需要机床有很高的内冷压力,且枪钻的钻头造价过高,有时孔的深度处于普通钻和枪钻的适用范围的交界处,使用普通钻工作效率低下,使用枪钻成本较高。
技术实现思路
为解决上述问题,本技术提供以下技术方案:一种空心组合钻头,包括钻头和护壁,所述钻头中心开有通透的钻头中孔,所述钻头中孔可以使切削液从钻头中心直达工件的待切削部位,有效地起到润滑和冷却的作用,所述护壁套设于钻头外部,能够防止钻深孔时钻头出现弯曲和振动的现象,护壁对钻头起到一定的保护作用,所述钻头底部的钻头切削部伸出护壁的底部,所述护壁的底部设有护壁切削部,钻头伸出的部位先接触工件进行钻孔,护壁的底部设有护壁切削部,当钻头进给一定程度后,护壁切削部能够对工件进行扩孔。进一步地,为了方便切削液的回收,在所述护壁上部外侧设有空心轴瓦,所述空心轴瓦两端与护壁外侧配合相对转动,通常地,护壁外侧的空心轴瓦是固定的,护壁是转动的,所述护壁上部开有护壁孔,所述护壁孔沿护壁的周向设置多个,所述空心轴瓦的中空部位与护壁外侧之间形成的切削液回收槽,所述护壁孔位于所述切削液回收槽中,且处于切削液回收槽的下部,所述切削液回收槽的上部设有切削液出口,切削液从切削液回收槽下部进入,从切削液回收槽的上部流出,所述空心轴瓦的顶部设有轴瓦固定卡口,所述轴瓦固定卡口与固定部件 ...
【技术保护点】
1.一种空心组合钻头,其特征在于,包括钻头和护壁,所述钻头中心开有通透的钻头中孔,所述护壁套设于钻头外部,所述钻头底部的钻头切削部伸出护壁的底部,所述护壁的底部设有护壁切削部。/n
【技术特征摘要】
1.一种空心组合钻头,其特征在于,包括钻头和护壁,所述钻头中心开有通透的钻头中孔,所述护壁套设于钻头外部,所述钻头底部的钻头切削部伸出护壁的底部,所述护壁的底部设有护壁切削部。
2.如权利要求1所述的空心组合钻头,其特征在于,所述护壁上部外侧还设有空心轴瓦,所述空心轴瓦两端与护壁外侧配合相对转动,所述护壁上部开有护壁孔,所述护壁孔沿护壁的周向设置多个,所述护壁孔位于所述空心轴瓦的中空部位与护壁外侧之间形成的切削液回收槽中,所述护壁孔位于所述切削液回收槽的下部,所述切削液回收槽的上部设有切削液出口。
3.如权利要求2所述的空...
【专利技术属性】
技术研发人员:杨正铁,杨正铜,
申请(专利权)人:盐城沐阳机械有限公司,
类型:新型
国别省市:江苏;32
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