阅读说明：本技术 定位压紧装置 (Positioning and pressing device ) 是由 曹烈 宋国秋 曲笛 于 2020-07-30 设计创作，主要内容包括：本发明提供了定位压紧装置,属于航空机械加工工艺装备领域。所述的定位压紧装置包括拉钉定位锁紧机构和高度可调机构；所述的拉钉定位锁紧机构包括外螺纹套、锁紧螺套、钢珠和拉钉；所述的高度可调机构包括螺纹导向销、螺纹导向座和螺母。高度精确调整的定位压紧装置通过多个钢珠获取夹持力,同时利用锥面产生向下的拉紧力,使夹具底板与外螺纹套定位面无间隙贴合；高度精确可调适应带有接差面的产品定位。(The invention provides a positioning and compressing device, and belongs to the field of aviation mechanical machining process equipment. The positioning and pressing device comprises a blind rivet positioning and locking mechanism and a height adjustable mechanism; the blind rivet positioning and locking mechanism comprises an external thread sleeve, a locking screw sleeve, a steel ball and a blind rivet; the height-adjustable mechanism comprises a thread guide pin, a thread guide seat and a nut. The positioning and pressing device with the accurately adjusted height obtains clamping force through a plurality of steel balls, and downward tensioning force is generated by utilizing the conical surface, so that the clamp bottom plate is in gapless fit with the positioning surface of the external thread sleeve; the height is accurate and adjustable, and the device is suitable for positioning products with joint difference surfaces.)

1. The positioning and pressing device is characterized by comprising a blind rivet positioning and locking mechanism and a height adjustable mechanism;

the blind rivet positioning and locking mechanism comprises an external thread sleeve (1), a locking threaded sleeve (3), a steel ball (2) and a blind rivet (4); the upper end surface of the external thread sleeve (1) is a positioning surface and is used for positioning the lower bottom surface of the clamp bottom plate (13), 1:100 conical holes are uniformly distributed in the radial direction of a guide part of the external thread sleeve (1), and the steel balls (2) are arranged in the conical holes; a locking threaded sleeve (3) is arranged outside the external threaded sleeve (1), and the lower part of the external threaded sleeve (1) is made into a threaded structure which is in threaded fit with the locking threaded sleeve (3) to realize axial movement; the guide hole at the upper end of the locking screw sleeve (3) is of a conical surface structure and is used for clamping the steel ball (2), and the steel ball (2) is extruded by screw precession to shrink along the radial direction; the lower end of the external thread sleeve (1) is provided with a countersink, the bottom of the external thread sleeve is provided with a positioning hole, a countersunk screw (7) is conveniently screwed on the thread guide pin (8) through the countersink, the positioning hole is matched with a shaft head of the thread guide pin (8), and accurate positioning is realized by the cylindrical pin (6); the pull nail (4) is positioned in the external thread sleeve (1), the lower end of the pull nail (4) is provided with a conical surface, and when the steel ball (2) is extruded to the conical surface, downward tension is generated while clamping is realized; the spigot at the upper end of the blind rivet (4) is matched and positioned with the positioning hole of the clamp bottom plate (13), the inner hole of the blind rivet (4) is a countersink and is in threaded connection through a conical screw (5), and the lower conical surface of the conical screw (5) is used for guiding;

the height adjustable mechanism comprises a thread guide pin (8), a thread guide seat (9) and a nut (10); the thread guide seat (9) is screwed on the basic platform (12) through an inner hexagonal socket head cap screw (14); the positioning sleeve (11) is used for positioning between a guide hole at the lower end of the thread guide seat (9) and a positioning hole of the base platform (12), and meanwhile, the positioning sleeve is in sliding fit with a guide part of the thread guide pin (8), and the nut (10) is used for locking after the height is accurately adjusted through a thread mechanism.

2. The positioning and pressing device as claimed in claim 1, characterized in that the number of taper holes uniformly distributed in the radial direction of the guiding portion of the externally threaded sleeve (1) is 8.

3. The positioning and pressing device as claimed in claim 1 or 2, characterized in that the outer circle of the locking screw sleeve (3) is knurled, and is provided with a radial wrench hole for tightening and loosening.

Technical Field

The invention belongs to the field of aviation mechanical processing technology equipment, and relates to positioning of products with different dimensions by two holes and one end surface, which can realize accurate and adjustable supporting, quick pressing and accurate positioning of height.

Background

The design and the development of mechanical processing technological equipment are the primary factors influencing the processing efficiency of products. Therefore, the mode of production of various small batches of aviation products requires that matched technological equipment has the functions of convenient support, quick positioning and quick compression. The supporting element, the positioning element and the pressing element in the conventional process equipment are mutually independent, and the design process and the manufacturing process are related to more elements, so that the design and manufacturing period is long and the cost is high; in conventional process equipment, the replacement time between different products machined by the same machine tool is long, so that the production preparation period is long, and the machining efficiency of the machine tool is low. The present invention has been made in view of the above technical background.

Disclosure of Invention

The purpose of the invention is: the pull pin is inserted from one side by utilizing the external thread sleeve with the steel ball guiding function and matching with the locking thread sleeve with the locking function, and the quick clamping and the accurate positioning can be realized; the height adjustment in the Z direction is realized by matching the thread guide pin with the thread guide seat, so that the positioning device is suitable for positioning surfaces with different heights.

The technical scheme of the invention is as follows:

the positioning and pressing device comprises a blind rivet positioning and locking mechanism and a height adjustable mechanism;

the blind rivet positioning and locking mechanism comprises an external thread sleeve 1, a locking screw sleeve 3, a steel ball 2 and a blind rivet 4; the upper end surface of the external thread sleeve 1 is a positioning surface and is used for positioning the lower bottom surface of the clamp bottom plate 13, 1:100 taper holes are uniformly distributed in the radial direction of the guide part of the external thread sleeve 1, and the steel balls 2 are arranged in the taper holes; the locking screw sleeve 3 is arranged outside the external screw sleeve 1, and the lower part of the external screw sleeve 1 is made into a thread structure which is in thread fit with the locking screw sleeve 3 to realize axial movement; the guide hole at the upper end of the locking screw sleeve 3 is of a conical surface structure and is used for clamping the steel ball 2, and the steel ball 2 is extruded by screw precession to shrink along the radial direction; the guiding part of the external thread sleeve 1 is matched with the guiding hole of the locking screw sleeve 3 to realize the guiding function; the lower end of the external thread sleeve 1 is provided with a countersink, the bottom of the external thread sleeve is provided with a positioning hole, a countersunk screw 7 is conveniently screwed on the thread guide pin 8 through the countersink, the positioning hole is matched with a shaft head of the thread guide pin 8, and accurate positioning is realized by the cylindrical pin 6; the pull nail 4 is positioned in the external thread sleeve 1, the lower end of the pull nail 4 is provided with a conical surface, and when the steel ball 2 is extruded to the conical surface, downward tension is generated while clamping is realized; the spigot at the upper end of the blind rivet 4 is matched and positioned with the positioning hole of the clamp bottom plate 13, the inner hole of the blind rivet 4 is a countersunk hole, the conical surface screw 5 is in threaded connection, and the lower conical surface of the conical surface screw 5 is used for guiding.

The height adjustable mechanism comprises a thread guide pin 8, a thread guide seat 9 and a nut 10; the thread guide seat 9 is screwed on the base platform 12 through an inner hexagonal socket head cap screw 14; the guide hole at the lower end of the thread guide seat 9 and the positioning hole of the base platform 12 are positioned by a positioning sleeve 11, and are in sliding fit with the guide part of the thread guide pin 8, and the height is accurately adjusted by a thread mechanism and then is locked by a nut 10. The screw precession realizes Z-direction adjustment; the holes and the pins are in sliding fit to realize accurate guiding.

The number of taper holes which are uniformly distributed in the radial direction of the guide part of the external thread sleeve 1 is 8.

The excircle of the locking screw sleeve 3 is knurled, and meanwhile, a wrench hole is formed in the radial direction and used for tightening and loosening.

The invention has the beneficial effects that: the positioning and pressing device with the accurately adjusted height obtains clamping force through 8 steel balls, and downward tensioning force is generated by utilizing the conical surface, so that the bottom plate of the clamp is in gapless fit with the positioning surface of the external thread sleeve; the height is accurate and adjustable, and the device is suitable for positioning products with joint difference surfaces.

Drawings

Fig. 1 is a schematic sectional view of a positioning and compressing device.

Fig. 2 is an external structural view of the positioning and pressing device.

In the figure: 1, an external thread sleeve; 2, steel balls; 3 locking the threaded sleeve; 4, pulling nails; 5, conical surface screws; 6, a cylindrical pin; 7 countersunk head screws; 8, a threaded guide pin; 9, a thread guide seat; 10, a nut; 11, positioning sleeves; 12 a base platform; 13 a clamp base plate; 14 hexagon socket head cap screw.

Detailed Description

The present invention is described in further detail below.

The positioning and pressing device with the accurately adjusted height consists of two parts. The rivet positioning and locking mechanism consists of an external thread sleeve 1, a locking screw sleeve 3, a steel ball 2 and a rivet 4; the external thread sleeve 1 is uniformly distributed with 8 taper holes with the diameter of 1:100, and the steel balls 2 are arranged in the taper holes; the locking screw sleeve 3 is provided with an angular conical surface, and the steel ball 2 is extruded by screw precession to contract along the radial direction; the lower end of the blind rivet 4 is provided with a conical surface, and when the steel ball 2 is extruded to the conical surface, downward tension is generated while clamping is realized. The height adjustable mechanism consists of a thread guide pin 8 and a thread guide seat 9; the screw precession realizes Z-direction adjustment; the holes and the pins are in sliding fit to realize accurate guiding.

The upper end surface of the external thread sleeve 1 is a positioning surface used for positioning the lower bottom surface of the clamp bottom plate 13; the guide part is matched with the guide hole of the locking screw sleeve 3 to realize the guide function, and the guide part is provided with taper holes which are uniformly distributed in the radial direction and used for the radial guide of the steel ball 2; the lower end is made into a thread structure which is in thread fit with the locking thread sleeve 3 to realize axial movement; the lower end of the screw is made into a countersink, the bottom of the screw is provided with a positioning hole, a countersunk screw 7 is screwed on the threaded guide pin 8 through the countersink, the positioning hole is matched with the shaft head of the threaded guide pin 8, and the cylindrical pin 6 is used for realizing accurate positioning. An inner hole at the upper end of the locking screw sleeve 3 is of a conical surface structure and is used for clamping the steel ball 2, the steel ball 2 is extruded by screw thread precession to contract along the radial direction, the lower end of the blind rivet is provided with a conical surface, and when the steel ball 2 is extruded to the conical surface of the blind rivet, downward tension force is generated while clamping is realized; the excircle is the knurling technology, has the spanner hole simultaneously radially for screw up and loosen. The spigot at the upper end of the blind rivet 4 is matched and positioned with the positioning hole of the clamp bottom plate 13, the inner hole is a countersunk hole and is in threaded connection with the conical surface screw 5, and the lower conical surface of the conical surface screw 5 is used for guiding. The height accurate adjusting mechanism in the device mainly comprises a threaded guide seat 9, a nut 10, a threaded guide pin 8 and the like. The thread guide seat 9 is screwed on the basic platform 12 by an inner hexagonal socket head cap screw 14; the lower end guide hole and the positioning hole of the base platform 12 are positioned by a positioning sleeve 11, and are in sliding fit with the guide part of the thread guide pin 8, and the height is accurately adjusted by a thread mechanism and is locked by a nut 10.