阅读说明：本技术 一种高速高精度主轴hsk刀柄的拉刀装置 (Broach device of high-speed high-precision main shaft HSK tool shank ) 是由 张贤良 于 2020-08-13 设计创作，主要内容包括：本发明公开了一种高速高精度主轴HSK刀柄的拉刀装置。拉刀装置位于主轴轴芯内侧前段位置,包括拉刀爪芯、拉刀爪片、双头螺杆、导正环、推杆及定位卡环,HSK刀柄一端插入主轴轴芯中,拉刀爪片安装于拉刀爪芯外部,在刀柄拉紧的状态时拉刀爪片的d部位小斜面与拉刀爪芯外轮廓前段小斜面贴合,使拉刀爪片向外扩张,通过拉刀爪片的d部位小斜面放大了碟簧提供的轴向锁紧力,以提供符合DIN 69893要求的夹持力,拉紧HSK刀柄。采用拉刀爪芯、拉刀爪片、定位卡环、导正环及推杆的集成结构,各部件相互约束匹配,零部件数量少,容易加工,组装简便,3段圆弧装配定位精度高,活动范围固定,接触面小不容易卡死,稳定可靠性强,使用自润滑套同时改善同心度,减少摩擦,结合拉刀爪芯、拉刀爪片、导正环电镀DLC涂层,结实耐用,延长了使用寿命,匹配自动换刀工况。(The invention discloses a broach device of a high-speed high-precision spindle HSK hilt. The broach device is located the inboard anterior segment position of main shaft axle core, including broach claw core, broach claw piece, double-end screw, guide ring, push rod and location snap ring, HSK handle of a knife one end inserts in the main shaft axle core, broach claw piece is installed in broach claw core outside, the little inclined plane in d position of broach claw piece laminates with the little inclined plane of broach claw core outline anterior segment of broach claw when the taut state of handle of a knife, makes broach claw piece outwards expand, the axial locking force that the dish spring provided has been enlargied through the little inclined plane in d position of broach claw piece, in order to provide the clamping-force that accords with DIN 69893 requirement, taut HSK handle of a knife. Adopt broach claw core, broach claw piece, the location snap ring, lead the integrated configuration of positive ring and push rod, each parts retrains the matching each other, spare part is small in quantity, easy processing, the equipment is simple and convenient, 3 sections circular arc positioning accuracy is high, the home range is fixed, the contact surface is little to be difficult to the card extremely, and reliable and stable nature is strong, uses self-lubricating cover to improve the concentricity simultaneously, reduces the friction, combine broach claw core, broach claw piece, lead positive ring and electroplate DLC coating, and is durable, and has prolonged service life, matches automatic tool changing operating mode.)

1. The utility model provides a broach device of high-speed high accuracy main shaft HSK handle of a knife which characterized in that: the broach device is located the inboard anterior segment position of main shaft axle core (2), including broach claw core (3), broach claw piece (4), double-end screw (5), lead positive ring (6), push rod (9) and location snap ring (10), HSK handle of a knife (1) one end inserts in main shaft axle core (2), broach claw piece (4) are installed in broach claw core (3) outside, the little inclined plane in d position of broach claw piece (4) and the little inclined plane laminating of broach claw core (3) outline anterior segment, make broach claw piece (4) outwards expand, the axial locking force that dish spring (8) provided has been enlarged through the little inclined plane in d position of broach claw piece (4) to provide the clamping-force that accords with the requirement of HSDIN 69893, taut HSK (1).

2. The broaching device of the high-speed high-precision main shaft HSK tool shank according to claim 1, which is characterized in that: the broach jaw piece (4) is mutually constrained and arranged between the spindle core and the broach jaw core by the arcs of the sections of the shapes a, b and c 3.

3. The broaching device of the high-speed high-precision main shaft HSK tool shank according to claim 1, which is characterized in that: the outside tail section of broach claw piece (4) is equipped with the round draw-in groove, and location snap ring (10) are installed in this draw-in groove, lean on location snap ring (10) elastic deformation to keep the little inclined plane in d position of broach claw piece (4) and the laminating of broach claw core (3) outside profile all the time at the taut, in-process of loosening of handle of a knife, location snap ring (10) can play the mutual contactless effect of broach claw piece (4) of separating multilobe simultaneously.

4. The broaching device of the high-speed high-precision main shaft HSK tool shank according to claim 1, which is characterized in that: when the knife handle is loosened, the broach claw core (3) and the guide ring (6) are connected with the push rod (9) through the double-end screw (5), the push rod (9) is pushed through an external electric cylinder or air cylinder or hydraulic cylinder, the guide ring (6) is synchronously pushed downwards, when the knife handle is loosened, the curved surface of the f part of the guide ring (6) is inserted into the inner side of the broach claw piece (4) and mutually constrained with the curved surface of the e part of the broach claw piece (4), even if the positioning snap ring (10) is elastically deformed and becomes invalid, the head of the broach claw piece (4) can be prized to contract inwards through the arc curved surface of the a part of the broach claw piece (4) as a fulcrum, the small inclined surface of the d part of the broach claw piece (4) is attached to the rear chute of the broach claw core (3), and a clearance required for loosening the knife handle (1) is given out.

Technical Field

The invention relates to a broach device applied to a main shaft, in particular to a broach device applied to a high-speed high-precision main shaft HSK hilt.

Background

With the development of the times, the industries such as aerospace, automobiles, molds and the like put forward higher requirements on the processing quality and the production efficiency, manual replacement of the tool shank is time-consuming and labor-consuming, and the automatic tool changing technology is widely applied. The high-speed high-precision spindle is a core component of a precision machine tool, and the broach device of the HSK hilt of the high-speed high-precision spindle is used for frequent tool changing working scenes, so that the automatic assembly and disassembly of the hilt are realized, and various complex working conditions are met. The broach device provided by the invention can be accurately positioned to open and close through mutual constraint matching of fewer parts, so that the cost is effectively reduced, and the processing precision and the service life are ensured.

Disclosure of Invention

The invention provides a broaching device applied to a high-speed high-precision spindle HSK (high speed, high precision) tool shank, aiming at the problems that the connection rigidity of the tool shank is insufficient, the positioning of the tool shank by the broaching device is inaccurate, the tool shank is not fast to replace and the like which often occur in the broaching process of the main spindle broaching device at present.

The technical scheme adopted by the invention is as follows: the broach device is positioned at the front section of the inner side of the spindle shaft core and comprises a broach claw core, broach claws, a double-end screw, a guide ring, a push rod and a positioning snap ring, wherein one end of an HSK (high speed, high speed and high precision) tool handle is inserted into the spindle shaft core, the broach claws are arranged outside the broach claw core, and d small inclined planes of the broach claws are attached to the front section of the outer contour of the broach claw core when the tool handle is in a tensioned state, so that the broach claws are expanded outwards, and the axial locking force provided by a disc spring is amplified through the d small inclined planes of the broach claws, so that the clamping force meeting the DIN 69893 requirement is provided, and the HSK tool handle is tensioned.

The broach jaw piece (4) is mutually constrained and arranged between the spindle core and the broach jaw core by the arcs of the sections of the shapes a, b and c 3.

The outer tail section of the broach jaw (4) is provided with a circle of clamping groove, the positioning clamping ring (10) is installed in the clamping groove, and the small inclined plane of the position d of the broach jaw (4) is always kept attached to the outer contour of the broach jaw (3) by elastic deformation of the positioning clamping ring (10) in the process of tensioning and loosening the tool holder. The positioning snap ring (10) can simultaneously play a role in separating the multi-petal broach claws (4) from contacting each other.

When the knife handle is loosened, the broach claw core (3) and the guide ring (6) are connected with the push rod (9) through the double-end screw (5), the push rod (9) is pushed through an external electric cylinder or air cylinder or hydraulic cylinder, the guide ring (6) is synchronously pushed downwards, when the knife handle is loosened, the curved surface of the f part of the guide ring (6) is inserted into the inner side of the broach claw piece (4) and mutually constrained with the curved surface of the e part of the broach claw piece (4), even if the positioning snap ring (10) is elastically deformed and becomes invalid, the head of the broach claw piece (4) can be prized to contract inwards through the arc curved surface of the a part of the broach claw piece (4) as a fulcrum, the small inclined surface of the d part of the broach claw piece (4) is attached to the rear chute of the broach claw core (3), and a clearance required for loosening the knife handle (1) is given out.

The invention has the beneficial effects that: adopt broach claw core, broach claw piece, the location snap ring, lead the integrated configuration of positive ring and push rod, each parts retrains the matching each other, spare part is small in quantity, easy processing, the equipment is simple and convenient, 3 sections circular arc positioning accuracy is high, the home range is fixed, the contact surface is little to be difficult to the card extremely, and reliable and stable nature is strong, uses self-lubricating cover to improve the concentricity simultaneously, reduces the friction, combine broach claw core, broach claw piece, lead positive ring and electroplate DLC coating, and is durable, and has prolonged service life, matches automatic tool changing operating mode.

Drawings

FIG. 1 is a sectional view of the overall structure of the spindle core of the present invention in a state where the shank is tensioned.

FIG. 2 is an enlarged view of a portion A of FIG. 1 according to the present invention.

FIG. 3 is a sectional view showing the overall structure of the spindle core in a state where the tool holder is released.

FIG. 4 is an enlarged view of a portion A of FIG. 3 according to the present invention.

Description of the figures

1-HSK knife handle; 2-main shaft core; 3-broach jaw core; 4-broach jaw; 5-double-head screw; 6-a pilot ring; 7-self-lubricating sleeve; 8-disc spring; 9-a push rod; 10-positioning snap ring; 11-O-ring; 12-O-ring; 13-sealing ring.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings: as shown in figure 1, a broach device of a high-speed high-precision spindle HSK tool shank is characterized in that: the broach device is located the inboard anterior segment position of main shaft axle core (2), including broach claw core (3), broach claw piece (4), double-end screw (5), lead positive ring (6), push rod (9) and location snap ring (10), HSK handle of a knife (1) one end inserts in main shaft axle core (2), broach claw piece (4) are installed in broach claw core (3) outside, the little inclined plane in d position of broach claw piece (4) and the little inclined plane in broach claw core (3) outline anterior segment laminating of handle of a knife taut state, make broach claw piece (4) outwards expand, the axial locking force that dish spring (8) provided has been enlarged through the little inclined plane in d position of broach claw piece (4) to provide the clamping-force that accords with the requirement of HSDIN 69893, taut K (1)

As shown in fig. 2, the broach jaw piece (4) is mutually constrained and arranged between the spindle shaft core and the broach jaw core by means of the sections of the circular arcs of the profiles a, b and c 3.

As shown in fig. 1, 2, 3 and 4, a circle of clamping groove is formed in the outer tail section of the broach jaw piece (4), the positioning clamping ring (10) is installed in the clamping groove, and the small inclined plane at the position d of the broach jaw piece (4) is always kept attached to the outer contour of the broach jaw core (3) by elastic deformation of the positioning clamping ring (10) in the process of tensioning and loosening the tool holder. The positioning snap ring (10) can simultaneously play a role in separating the multi-petal broach claws (4) from contacting each other.

As shown in fig. 3 and 4, when the tool holder is loosened, the broach jaw core (3) and the guide ring (6) are connected with the push rod (9) through the double-head screw (5), the push rod (9) is pushed through an external electric cylinder or air cylinder or hydraulic cylinder, the guide ring (6) is synchronously pushed downwards, when the tool holder is loosened, the curved surface of the f part of the guide ring (6) is inserted into the inner side of the broach jaw (4) and is mutually constrained with the curved surface of the e part of the broach jaw (4), even if the positioning snap ring (10) is elastically deformed and becomes invalid, the head part of the broach jaw (4) can be pried to contract inwards through the arc curved surface of the a part of the broach jaw (4) as a fulcrum, so that the small inclined surface of the d part of the broach jaw (4) is attached to the chute at the rear section of the broach jaw core (3), and a clearance required by loosening the HSK (1) is ensured.

The invention designs an integrated structure of a broach claw core (3), broach claws (4), a double-threaded screw (5), a guide ring (6), a push rod (9) and a positioning snap ring (10), the broach claw core (3) guide ring (6) and the push rod (9) are connected through the double-threaded screw (5), an O-shaped ring (11) and an O-shaped ring (12) are arranged at the joint for sealing, and the application occasions of central water spraying or central air blowing and air suction can be used.

The arrangement of the guide ring (6) can not only ensure that the broach claw (4) is reliably positioned by prying when the broach is in the final state, but also slide up and down in the self-lubricating sleeve (7) all the time, thereby ensuring the concentricity and the service life, and being convenient to maintain. In some use occasions, the guide ring (6) is coated with a wear-resistant layer, and the self-lubricating sleeve (7) can be omitted from adopting a main shaft and shaft core integrated structure, so that the integrated structure is simplified.

The push rod (9) is provided with a sealing ring (13) which can play the roles of sealing, dust prevention and improvement of the concentricity of the integrated structure in the process of loosening and pulling the knife handle. The push rod (9) and the double-end screw rod (5) can be integrated into a whole, or the double-end screw rod (5) and the guide ring (6) are integrated into a whole, so that the whole structure is simplified.

The above description is only a preferred embodiment of the present invention, and the scope of protection is not limited thereto, and all changes and modifications that do not go through creative efforts according to the technical spirit of the present invention still fall within the scope of protection of the technical solution of the present invention.