阅读说明：本技术 一种高精度斜键键槽拉削装置 (High-precision taper key groove broaching device ) 是由 刘毅 荆宝慧 葛付宝 金玉谟 于 2019-09-29 设计创作，主要内容包括：本发明属于机械加工技术领域,尤其涉及一种高精度斜键键槽拉削装置,包括斜度式连接盘和定位芯轴,所述斜度式连接盘用于连接卧式拉床和定位芯轴,其尾端与卧式拉床过盈配合,所述斜度式连接盘的中心轴线与其回转中心线重合,所述斜度式连接盘的首端端面为一平面,且与回转中心线呈一定角度倾斜,所述定位芯轴的尾端端面为平面,所述定位芯轴的尾端端面与斜度式连接盘的首端端面相抵,两个端面可拆卸连接于一起,所述定位芯轴的首端设置为圆柱,所述圆柱的中心轴线与定位芯轴的尾端端部端面相垂直。本发明所述的拉削装置,定位可靠、加工精度高、生产效率高、操作方便,加工键槽斜度一致性好,可应用于各种斜键槽的拉削。(The invention belongs to the technical field of machining, and particularly relates to a high-precision taper key groove broaching device which comprises an inclination type connecting disc and a positioning mandrel, wherein the inclination type connecting disc is used for connecting a horizontal broaching machine and the positioning mandrel, the tail end of the inclination type connecting disc is in interference fit with the horizontal broaching machine, the central axis of the inclination type connecting disc is superposed with the rotation central line of the inclination type connecting disc, the head end face of the inclination type connecting disc is a plane and inclines at a certain angle with the rotation central line, the tail end face of the positioning mandrel is a plane, the tail end face of the positioning mandrel is abutted against the head end face of the inclination type connecting disc, the two end faces are detachably connected together, the head end of the positioning mandrel is arranged to be a cylinder, and the central axis of the cylinder is perpendicular. The broaching device provided by the invention has the advantages of reliable positioning, high processing precision, high production efficiency, convenience in operation and good consistency of the inclination of the processed key groove, and can be applied to broaching of various oblique key grooves.)

1. The utility model provides a high accuracy taper key keyway broaching device which characterized in that: the taper type connecting disc is used for connecting a horizontal broaching machine and a positioning mandrel, the tail end of the taper type connecting disc is detachably and fixedly connected with the horizontal broaching machine, the central axis of the taper type connecting disc is coincident with the rotation central line of the taper type connecting disc, the head end face of the taper type connecting disc is a plane, the plane and the rotation central line incline at a certain angle alpha, the angle alpha is set according to the requirement of the inclination of a required key groove, the tail end face of the positioning mandrel is a plane, the tail end face of the positioning mandrel is abutted against the head end face of the taper type connecting disc, the two end faces are detachably and fixedly connected through a fastening device, the head end of the positioning mandrel is set to be a cylinder B, the cylinder B and the positioning mandrel are coaxially arranged and used for positioning and installing a product needing broaching the inclined key groove, and the central axis of the cylinder B is perpendicular to the tail, the positioning core shaft and the inclination type connecting disc are provided with grooves in a through mode, the grooves are used for positioning in the broaching process of a common standard broach and enabling the broach to pass through the grooves, so that the processing of an inclined key groove in a product is completed, the bottom surface of each groove is parallel to the rotation center line of the inclination type connecting disc and has strict parallelism requirements, the bottom surface of each groove and the rotation center line of the positioning core shaft have strict angle requirements, the angle value is the angle alpha, the width dimension of each groove is matched with the width of a broach body, and the height dimension of each groove is larger than the height dimension of the broach body.

2. The high precision tapered key groove broaching device according to claim 1, wherein: the positioning core shaft is characterized in that a plurality of pin holes are formed in the end face of the head end of the inclination type connecting disc, a plurality of positioning pins are arranged on the end face of the tail end of the positioning core shaft in an outwards protruding mode, and the shapes and the sizes of the positioning pins are matched with those of the pin holes and used for achieving positioning of the positioning core shaft on the inclination type connecting disc.

3. The high precision tapered key groove broaching device according to claim 1, wherein: the inclination type connecting disc and the positioning core shaft are all provided with the same number of pin holes in a penetrating mode, the pin holes in the inclination type connecting disc and the positioning core shaft correspond to each other in a one-to-one mode in position, positioning pins can be detachably arranged in the pin holes, and the positioning pins are in interference fit with the pin holes.

4. The high precision tapered key groove broaching device according to claim 3, wherein: the number of the pin holes on the inclined connecting disc is 2-10.

5. The high-precision tapered key groove broaching device according to claim 1 or 2, wherein: the center of the head end face of the inclination type connecting disc is provided with a positioning round hole, the central axis of the positioning round hole is perpendicular to the head end face of the inclination type connecting disc, the center of the tail end portion of the positioning mandrel is provided with a positioning cylinder in an outwards protruding mode, and the positioning cylinder is in interference fit with the positioning round hole.

6. The high precision tapered key groove broaching device according to claim 1, wherein: the inclination type connecting disc is made of the same material as the positioning mandrel, and can be made of die steel, high-quality alloy structural steel or bearing steel.

Technical Field

The invention belongs to the technical field of machining, and particularly relates to a high-precision taper key groove broaching device.

Background

The upper surface and the lower surface of the inclined key are working surfaces, the upper surface of the key has inclination, the bottom surface of the key groove of the hub has inclination, when the inclined key is arranged in the shaft and the hub, the surface generates great pretightening force, and the inclined key mainly transfers torque by friction force during working and can bear unidirectional axial force. The inclined key can realize accurate positioning in the radial direction, the circumferential direction and the axial direction, is convenient to disassemble and assemble, and is widely applied to shaft connection.

The inner hole taper key groove is usually processed by slotting, planing, broaching, linear cutting and the like. The method for broaching the taper key groove by using the common horizontal broaching machine is a common processing mode, but the taper key groove of the common horizontal broaching machine is generally formed by simply processing a flat gasket on one end pad of a flat key groove broaching tool, so that the processed taper key groove is low in precision, poor in consistency, difficult to guarantee in size and inclination, and seriously influences the production efficiency due to the fact that the gasket needs to be frequently replaced.

Disclosure of Invention

According to the defects of the prior art, the invention provides a high-precision tapered key groove broaching device, which effectively solves the problems of low efficiency, low precision and inconvenient operation in the tapered key groove machining process in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: a high-precision taper key groove broaching device comprises an inclination type connecting disc and a positioning mandrel, wherein the inclination type connecting disc is used for connecting a horizontal broaching machine and the positioning mandrel, the tail end of the inclination type connecting disc is detachably and fixedly connected with the horizontal broaching machine, the central axis of the inclination type connecting disc is superposed with the rotation central line of the inclination type connecting disc, the head end face of the inclination type connecting disc is a plane, the plane and the rotation central line form a certain angle alpha, the angle alpha is set according to the inclination requirement of a required key groove, the setting parameter range of the angle alpha is suitable for different inclination requirements, the tail end face of the positioning mandrel is a plane, the tail end face of the positioning mandrel is abutted against the head end face of the inclination type connecting disc, the two end faces are detachably and fixedly connected through a fastening device, the head end of the positioning mandrel is set to be a cylinder B, the positioning device is used for positioning and mounting a product needing broaching and processing the oblique key groove, the central axis of the cylinder B is vertical to the end face of the tail end part of the positioning mandrel, grooves are formed in the positioning mandrel and the oblique connecting disc in a penetrating manner, the grooves are used for positioning in the broaching process of a common standard broach and enabling the broach to pass through the grooves, so that the oblique key groove is processed, the bottom surface of each groove is parallel to the rotating center line of the oblique connecting disc and has strict parallelism requirements, the bottom surface of each groove and the rotating center line of the positioning mandrel have strict angle requirements, the angle value is the angle alpha, the oblique key groove has strict tolerance requirements according to the precision grade of the oblique key groove required by the product, the width dimension of each groove is matched with the width of the broach body to play a role in positioning the broach, the height dimension of each groove is larger than the height dimension, and the broach body can conveniently pass through the high-precision oblique key groove broaching device without interference, thereby realizing the processing of the high-precision oblique key groove.

The positioning core shaft is characterized in that a plurality of pin holes are formed in the end face of the head end of the inclination type connecting disc, a plurality of positioning pins are arranged on the end face of the tail end of the positioning core shaft in an outwards protruding mode, and the shapes and the sizes of the positioning pins are matched with those of the pin holes and used for achieving positioning of the positioning core shaft on the inclination type connecting disc.

The inclination type connecting disc and the positioning core shaft are all provided with the same number of pin holes in a penetrating mode, the pin holes in the inclination type connecting disc and the positioning core shaft correspond to each other in a one-to-one mode in position, positioning pins can be detachably arranged in the pin holes, and the positioning pins are in interference fit with the pin holes.

The number of the pin holes on the inclined connecting disc is 2-10.

The center of the head end face of the inclination type connecting disc is provided with a positioning round hole, the central axis of the positioning round hole is perpendicular to the head end face of the inclination type connecting disc, the center of the tail end portion of the positioning mandrel is provided with a positioning cylinder in an outwards protruding mode, and the positioning cylinder is in interference fit with the positioning round hole.

The inclination type connecting disc is made of the same material as the positioning mandrel, and can be made of die steel, high-quality alloy structural steel or bearing steel.

The invention has the following beneficial effects: the broaching device has the advantages of reliable positioning, high processing precision, high production efficiency, convenient operation and good consistency of the inclination of the processed key groove, and can be applied to broaching of various inclined key grooves by changing the inclination degree of the head end surface of the inclined connecting disc and the rotation center line.

Drawings

FIG. 1 is a left side view of a first embodiment of the present invention;

FIG. 2 is a schematic front view of a first embodiment of the present invention;

FIG. 3 is an enlarged schematic left view of the angled interface disk of FIG. 1;

FIG. 4 is an enlarged left side view of the positioning mandrel of FIG. 1;

in the figure: 1. inclination type connecting disc 11, cylinder A12, pin hole 13, location round hole 14, flange A2, location dabber 21, cylinder B22, locating pin 23, location cylinder 24, flange B3, fastening bolt 4, recess.

Detailed Description

The invention is further described below with reference to the accompanying drawings.