CN111940798B

CN111940798B - Drill bushing rotation-proof and pull-off-proof limiting tool

Info

Publication number: CN111940798B
Application number: CN202010823106.7A
Authority: CN
Inventors: 王洪浩; 牛爱玲; 郑胜深
Original assignee: Shenyang Aircraft Industry Group Co Ltd
Current assignee: Shenyang Aircraft Industry Group Co Ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2022-07-19
Anticipated expiration: 2040-08-17
Also published as: CN111940798A

Abstract

The invention belongs to the technical field of technological equipment and design in the field of aeronautical machinery processing, and discloses an anti-rotation and anti-pull-off limiting tool for a drill bushing. The tool comprises a limiting pin, an L-shaped clamping piece, a shoulder-cutting drill bushing, a fixed bushing and a drill plate. The multi-lug hole horizontal drilling tool can realize standardization and commercialization of the multi-lug hole horizontal drilling tool, prevent the situations of drilling, expanding, pulling off of a hinge sleeve, sleeve falling and the like when the multi-lug hole is drilled and the cutter is withdrawn, and simultaneously avoid the risk of unstable processing quality caused by the simultaneous rotation of the drilling, expanding and hinge sleeve and the cutter in the drilling process; the tool is simple and reliable in design, low in manufacturing cost, free of precise manufacturing means and easy to popularize and apply.

Description

Drill bushing rotation-proof and pull-off-proof limiting tool

Technical Field

The invention belongs to the technical field of technological equipment and design in the field of aeronautical machinery processing, and relates to a tool for preventing a drill bushing from rotating and pulling off, which is used for horizontally drilling a multi-lug part hole.

Background

The main function part of the currently adopted tool structure for preventing the rotation and the pull-off of the drill bushing is matched with a standard quick-change drill bushing structure by a drill bushing screw screwed on a drill bushing plate, and the screw with large height size of a bush protruding out of the surface of the drill bushing plate are suitable for the situations of open drilling space and vertical drilling. The device is not suitable for the situation that the installation space of the horizontal drilling is narrow. When lug holes perpendicular to the end faces of the multiple lugs are drilled on wing ribs, wing boxes and other parts on the airplane, the anti-rotation and anti-pull-off technology cannot meet the requirements of preventing rotation and pull-off of drilling of special products due to small lug spacing and narrow drill bushing installation space.

Disclosure of Invention

The invention provides an anti-rotation and anti-pull-out tool in order to solve the technical problem of anti-rotation and anti-pull-out of a drill bushing in the horizontal drilling process.

The technical scheme of the invention is as follows:

the utility model provides a drill bushing prevents changeing, prevents drawing and takes off spacing frock, includes spacer pin 1, L type card 2, cuts shoulder drill bushing 3, fixed bush 4 and bushing plate 5.

The drill plate 5 is provided with a hollow cylindrical groove, and the groove is provided with a precision hole. The fixed bush 4 is pressed into a groove of the drill plate 5 to form an assembly body as an anti-rotation and anti-pull-off base component. The shoulder-cutting drill bush 3 is of a step structure, and shoulders of a large-diameter part of the shoulder-cutting drill bush are symmetrically cut; the shoulder cutting drill bush 3 is sleeved in the fixed bush 4 and forms sliding fit connection with the fixed bush 4, and meanwhile, the shoulder surface of the shoulder cutting drill bush 3 is attached to the groove plane of the drill plate 5. The shoulder cutting drill sleeve 3 can be replaced, has different specifications of inner holes and is used for guiding drilling, expanding and hinging.

The section of the L-shaped card 2 is L-shaped, one end of the L-shaped card is provided with a U-shaped groove, and the other end of the L-shaped card is provided with a refined hole; a clamping groove is formed in the inner profile surface of the L-shaped card 2; the limiting pin 1 connects the refined hole on the L-shaped clamping piece 2 with the refined hole on the groove of the drill plate 5, so that the axial rotation and the axial translation of the shoulder-cutting drill bush 3 are limited.

Wherein, the limiting pin 1 is in interference fit with the refined hole of the L-shaped card 2 and is in sliding fit with the refined hole of the drill plate 5; meanwhile, the length of the limiting pin 1 inserted into the drilling template 5 refined hole is smaller than the hole depth of the drilling template 5 refined hole, and a small gap larger than 0.1mm is reserved between the clamping groove of the L-shaped card 2 and the groove plane of the drilling template 5.

The width of a U-shaped groove of the L-shaped card 2 is larger than the width of a shoulder of the shouldered drill bush 3 after edging; the depth of the clamping groove of the L-shaped clamping piece 2 is larger than the thickness of the shoulder cutting drill bushing 3.

The limiting pin 1 is a cylindrical pin or a step pin with an upper section and a lower section with equal-diameter unequal tolerance.

The invention has the beneficial effects that: the multi-lug hole horizontal drilling tool can realize standardization and commercialization of the multi-lug hole horizontal drilling tool, prevent the situations of drilling, expanding, pulling off of a hinged sleeve, sleeve falling and the like when the multi-lug hole is drilled and the tool is withdrawn, and simultaneously avoid the risk of unstable processing quality caused by the simultaneous rotation of the drilling, expanding and hinged sleeve and the tool in the drilling process; the tool is simple and reliable in design, low in manufacturing cost, free of precise manufacturing means and easy to popularize and apply.

Drawings

FIG. 1 is a cross-sectional view of a front view of a drill bushing anti-rotation and anti-pull-off limiting tool.

Fig. 2 is a side view of the drill bushing anti-rotation and anti-pull-out limiting tool.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

In the figure: 1. a spacing pin; an L-shaped card; 3. a shoulder-cutting drill bushing; 4. fixing the bushing; 5. and (6) drilling a template.

Detailed Description

The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.

The drilling and sleeve changing process of the product is as follows:

1) and pressing the fixing bush 4 into the groove of the drill plate 5, and inserting the shoulder-cutting drill bush 3 into the fixing bush 4 to ensure that the shoulder of the shoulder-cutting drill bush 3 is tightly attached to the groove plane of the drill plate 5.

2) The L-shaped card 2 is flatly inserted along the shoulder of the shoulder cutting drill bush 3 to clamp the fixed bush 4; the refined hole of the L-shaped card 2 is connected with the refined hole of the drill jig plate 5 through the limiting pin 1, so that the assembly formed by the limiting pin 1 and the L-shaped card 2 is connected with the drill jig plate 5 into a whole. At the moment, the shoulder cutting drill bushing 3 is clamped by the bayonet of the L-shaped clamping piece 2 along the axis direction, and is inserted and fixed by the clamping groove of the L-shaped clamping piece 2 in the circumferential direction, so that the shoulder cutting drill bushing 3 is prevented from being driven by a cutter to rotate and/or being pulled off along the axis when a drilling tool advances and retreats in drilling processing, the follower rotation or being pulled off is prevented, the stable state of the drilling and expanding reaming bushing is ensured when drilling, expanding and reaming, the stability of the drilling, expanding and reaming processing quality of parts of the products is finally ensured, and the delivery progress and quality are ensured.

3) When the shoulder-cutting drill bushing 3 is replaced in finish machining, the assembly component of the limiting pin 1 and the L-shaped clamping piece 2 is pulled out, then the shoulder-cutting drill bushing 3 is withdrawn along the axial direction, and the steps 1) -2) are repeated after the fixed bushing 4 is inserted into the expansion and reaming sleeve of the chamfered edge until finish machining is finally completed.

The description of the exemplary embodiments presented above is intended only to illustrate the technical solution of the invention, and is not intended to be exhaustive or to limit the invention to the precise forms described. Obviously, many modifications and variations are possible to those skilled in the art in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to thereby enable others skilled in the art to understand, implement and utilize the invention in various exemplary embodiments and with various alternatives and modifications. It is intended that the scope of the invention be defined by the following claims and their equivalents.

Claims

1. The tool is characterized by comprising a limiting pin (1), an L-shaped clamping piece (2), a shoulder-cutting drill bushing (3), a fixing bushing (4) and a drill plate (5);

the drill plate (5) is provided with a hollow cylindrical groove, and the groove is provided with a precision hole; the fixed bushing (4) is pressed into a groove of the drill plate (5) to form an assembly body as a basic component of the tool; the shoulder cutting drill bush (3) is of a step structure, and shoulder parts of the shoulder cutting drill bush are symmetrically cut; the shoulder cutting drill bush (3) is sleeved in the fixed bushing (4) and is connected with the fixed bushing (4) in a sliding fit manner, and meanwhile, the shoulder surface of the shoulder cutting drill bush (3) is attached to the groove plane of the drill plate (5);

The section of the L-shaped card (2) is L-shaped, one end of the L-shaped structure is provided with a U-shaped groove, and the other end of the L-shaped structure is provided with a refined hole; the inner profile of the L-shaped card (2) is provided with a clamping groove; the limiting pin (1) connects the refined hole on the L-shaped clamping piece (2) with the refined hole on the groove of the drilling template (5), so that the axial rotation of the shoulder-cutting drill bush (3) and the translation in the axial direction are limited.

2. The tool for preventing rotation and pulling-off of the drill bushing according to claim 1, wherein the limiting pin (1) is in interference fit with the refined hole of the L-shaped clamping piece (2) and is in sliding fit with the refined hole of the drill plate (5).

3. The tool for preventing the drill bushing from rotating and pulling off and limiting the position according to claim 1 or 2, wherein the length of the limiting pin (1) inserted into the refined hole of the drill plate (5) is less than the depth of the refined hole of the drill plate (5); a micro gap larger than 0.1mm is reserved between the clamping groove of the L-shaped clamping piece (2) and the groove plane of the drill plate (5); the width of a U-shaped groove of the L-shaped card (2) is larger than the width of a shoulder of the shouldered drill sleeve (3) after edging; the depth of the clamping groove of the L-shaped clamping piece (2) is larger than the thickness of the shoulder cutting drill sleeve (3).

4. The tool according to claim 1 or 2, wherein the stop pin (1) is a cylindrical pin or a stepped pin with equal-diameter unequal-tolerance upper and lower sections.

5. The tool according to claim 3, wherein the stop pin (1) is a cylindrical pin or a stepped pin with equal diameters and unequal tolerances in an upper section and a lower section.