阅读说明：本技术 一种堵头罩球头孔的加工工装及加工方法 (Machining tool and machining method for plug cover ball hole ) 是由 陈海洋 刘德俊 刘成 阎杰 黄小惠 于 2021-09-28 设计创作，主要内容包括：本申请具体涉及一种堵头罩球头孔的加工工装及加工方法,属于堵头罩加工领域,包括：挤压部件,包括挤压面,挤压部件的外表面设有凸起,用于将堵头罩的侧壁挤压出底孔；底座,底座开设有加工槽和加工孔,加工槽用于承载堵头罩,加工孔对应底孔,用于容纳被凸起挤压出的堵头罩侧壁；压杆,压杆的端部用于抵接在挤压面上,推动挤压部件向堵头罩的内侧壁挤压。压杆下压,挤压面将压杆的竖直方向的作用力转变为水平方向的作用力,推动挤压块的外周侧设置的凸起对堵头罩的侧壁进行挤压,使堵头罩的侧壁向外凸起,将凸起的部分切削整平,便得到球头孔。如此设置,挤压成型的球头孔能够完全配合堵头座上的钢珠,加工精度高。(The application specifically relates to a processing frock and a processing method in end cap cover bulb hole belongs to end cap cover processing field, includes: the extrusion component comprises an extrusion surface, and the outer surface of the extrusion component is provided with a bulge for extruding the side wall of the plugging cover out of the bottom hole; the plug cover comprises a base, a processing groove and a processing hole, wherein the processing groove is used for bearing the plug cover, and the processing hole corresponds to a bottom hole and is used for accommodating the side wall of the plug cover extruded by the protrusion; and the end part of the pressure lever is abutted against the extrusion surface to push the extrusion component to extrude towards the inner side wall of the plug cover. The pressing rod is pressed downwards, the vertical acting force of the pressing rod is converted into the horizontal acting force by the pressing surface, the protrusions arranged on the outer peripheral side of the pressing block are pushed to extrude the side wall of the plug cover, the side wall of the plug cover protrudes outwards, the protruding parts are cut and leveled, and then the ball head hole is obtained. So set up, the ball head hole of extrusion can cooperate the steel ball on the end cap seat completely, and the machining precision is high.)

1. The utility model provides a processing frock in end cap cover bulb hole, end hole and cover hole (11) have been seted up in end cap cover (1), its characterized in that, processing frock (2) include:

the outer surface of the extrusion component (21) is provided with a protrusion (2111) for extruding the side wall of the plugging cover (1) out of the bottom hole, and the extrusion component (21) comprises an extrusion surface (2112);

the plug cap comprises a base (22), wherein the base (22) is provided with a processing groove (221) and a processing hole (222), the processing groove (221) is used for bearing the plug cap body (1), and the processing hole (222) corresponds to a bottom hole and is used for accommodating the side wall of the plug cap body (1) extruded by the protrusion (2111);

the end part of the pressure rod (23) is used for being abutted against the extrusion surface (2112) to push the extrusion component (21) to extrude towards the inner side wall of the plugging cover (1).

2. The tooling for machining the plug cover ball hole is characterized in that the extruding component (21) comprises a first extruding block (211) and a second extruding block (212), and the first extruding block (211) and the second extruding block (212) are identical in structure and are axisymmetric with respect to the center line of the pressing rod (23).

3. The tooling for machining the plug cover ball hole according to claim 2, wherein the first extrusion block (211) and the second extrusion block (212) are both semi-cylindrical.

4. The tooling for machining the plug cover ball hole according to claim 2, wherein the extrusion component (21) further comprises a first bearing block (213) and a second bearing block (215), the first bearing block (213) is arranged at the bottom of the first extrusion block (211), and the first extrusion block (211) is connected with the first bearing block (213) through a connecting block (214); the second bearing block (215) is arranged at the bottom of the second extrusion block (212), and the second extrusion block (212) is connected with the second bearing block (215) through a connecting block (214).

5. The tooling for machining the plug cover ball hole according to claim 4, wherein the first bearing block (213) and the second bearing block (215) are semi-cylindrical and correspond to the shape of the cover hole (11), the radius of the first bearing block (213) and the radius of the second bearing block (215) are smaller than or equal to the radius of the cover hole (11), and the radius of the connecting block (214) is smaller than the radius of the first bearing block (213) and the radius of the second bearing block (215).

6. The tooling for machining the plug cover ball hole according to claim 1, wherein the diameter of the machining hole (222) is equal to the diameter of the outer side of the ball hole (12) to be machined.

7. The tooling for machining the plug cover ball hole according to claim 1, wherein the bottom of the compression rod (23) is wedge-shaped, the extrusion surface (2112) is an inclined surface matched with the wedge-shaped surface, and an included angle between the extrusion surface (2112) and a center line of the compression rod (23) is less than or equal to 15 °.

8. The tooling for machining the plug cover ball hole is characterized in that the tooling (2) further comprises a pressing block (24), the pressing block (24) is arranged above the base (22), and a through hole (241) for the pressing rod (23) to pass through is formed in the top of the pressing block (24).

9. The tooling for machining the plug cover ball hole is characterized in that a pressure groove (242) is formed in the bottom of the pressure block (24), and the shape of the pressure groove (242) is matched with that of the top of the plug cover (1).

10. The machining method for the plug cover ball hole of the machining tool is characterized by comprising the following steps of:

placing the plugging head cover (1) into a processing groove (221), and aligning a bottom hole with a processing hole (222);

placing an extrusion block (24) into the blanking cap (1) with the protrusions (2111) aligned with the bottom hole;

the end part of the pressure lever (23) is abutted against the extrusion surface (2112), and the pressure lever (23) is pressed downwards, so that the bulge (2111) extrudes the bottom hole;

and trimming the outer side surface of the plugging head cover (1).

Technical Field

The application relates to the field of plug cover machining, in particular to a machining tool and a machining method for a plug cover ball hole.

Background

On modern engines of airplanes, ships and the like, probe holes are usually reserved on main parts of the engines for convenient observation and maintenance. The reserved probe holes on the engine can be at the positions of a combustion chamber, a low-pressure turbine, guide vanes and the like, and different engines can reserve the probe holes at different positions. When the exploration hole is not used, a hole detector plug is required to be used for plugging. The hole detector plug comprises a plug cover and a plug seat, the plug cover covers the outer side of the plug seat, telescopic steel balls are arranged on the outer peripheral side of the plug seat, a ball head hole matched with the steel balls is arranged on the inner side of the plug cover, a special cutter is usually adopted for material reduction processing of the ball head hole on the plug cover in the prior art, the ball head hole is formed in the plug cover through rotation of the cutter, but due to the fact that the manufacturing precision of the special cutter is poor, the shaking of the cutter in the processing process can increase the processing error, the precision of the processed ball head hole is poor, a large gap exists when the ball head hole is matched with the corresponding steel balls, the blocking and interference phenomenon often exists when the ball head hole is repeatedly used, and the overall performance of a product is affected.

Disclosure of Invention

The application provides a processing frock in end cap cover bulb hole to solve the poor technical problem of the bulb hole precision of processing end cap cover among the prior art.

In a first aspect, the application provides a processing frock in end cap cover bulb hole, bottom opening and cover hole have been seted up to the end cap cover, its characterized in that, processing frock includes:

the outer surface of the extrusion part is provided with a bulge for extruding the side wall of the plugging head cover out of the bottom hole, and the extrusion part comprises an extrusion surface;

the base is provided with a processing groove and a processing hole, the processing groove is used for bearing the plug cover, and the processing hole corresponds to the bottom hole and is used for accommodating the side wall of the plug cover extruded by the protrusion;

and the end part of the pressure lever is abutted against the extrusion surface to push the extrusion component to extrude towards the inner side wall of the plugging head cover.

Optionally, the pressing component includes a first pressing block and a second pressing block, and the first pressing block and the second pressing block have the same structure and are axisymmetric with respect to a center line of the pressing rod.

Optionally, the first extrusion block and the second extrusion block are both semi-cylindrical.

Optionally, the extrusion component further includes a first bearing block and a second bearing block, the first bearing block is disposed at the bottom of the first extrusion block, and the first extrusion block is connected to the first bearing block through a connection block; the second bearing block is arranged at the bottom of the second extrusion block, and the second extrusion block is connected with the second bearing block through a connecting block.

Optionally, the first bearing block and the second bearing block are semi-cylindrical and correspond to the shape of the cover hole, the radius of the first bearing block and the radius of the second bearing block are smaller than or equal to the radius of the cover hole, and the radius of the connecting block is smaller than the radius of the first bearing block and the radius of the second bearing block.

Optionally, the diameter of the machining hole is equal to the diameter of the outer side of the ball head hole to be machined.

Optionally, the bottom of the pressure lever is wedge-shaped, the extrusion surface and the inclined surface matched with the wedge-shaped surface form an included angle smaller than or equal to 15 ° with the center line of the pressure lever.

Optionally, the processing tool further comprises a pressing block, the pressing block is arranged above the base, and a through hole for the pressing rod to pass through is formed in the top of the pressing block.

Optionally, the bottom of the pressing block is provided with a pressing groove, and the pressing groove is matched with the top of the plugging cover in shape.

In a second aspect, the application further provides a method for machining a plug cover ball hole by using the machining tool, which includes the following steps:

placing the plug cover into a processing groove, and aligning the bottom hole with the processing hole;

placing the extrusion block into the plugging head cover, and aligning the bulge with the bottom hole;

the end part of the pressure lever is abutted against the extrusion surface, and the pressure lever is pressed downwards to enable the bulge to extrude the bottom hole;

and trimming the outer side surface of the plugging head cover.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

according to the processing tool and the processing method for the plug cover ball head hole, the pressing rod is pressed downwards, the extrusion block is pushed through the extrusion face, the protrusion is enabled to extrude the side wall of the plug cover, the side wall of the plug cover protrudes outwards, the protruding side wall is accommodated in the processing hole, the protruding side wall is cut and leveled, and the ball head hole is processed into the ball head hole.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a plugging head cover provided in an embodiment of the present application;

FIG. 2 is a schematic view of the internal structure of the plugging head cap according to the embodiment of the present application;

fig. 3 is a schematic view of an assembly structure of a plugging head cover and a processing tool provided in the embodiment of the present application;

FIG. 4 is a schematic structural diagram of an extrusion component provided in an embodiment of the present application;

fig. 5 is a schematic structural view of the plugging head cap and the processing tool provided in the embodiment of the present application before processing;

fig. 6 is a schematic structural view of the plug cap and the processing tool provided in the embodiment of the present application after processing.

Reference numerals:

1-plugging cover, 11-cover hole and 12-ball hole;

2-processing tooling, 21-extrusion part, 211-first extrusion block, 2111-protrusion, 2112-extrusion surface, 212-second extrusion block, 213-first bearing block, 214-connecting block, 215-second bearing block, 22-base, 221-processing groove, 222-processing hole, 223-square hole, 23-pressure bar, 24-pressure block, 241-through hole and 242-pressure groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

First aspect, the application provides a processing frock in end cap cover bulb hole.

As shown in fig. 1 and 2, the plug cover 1 is in a cylindrical cover shape, the bottom of the plug cover is provided with a cover hole 11, two bottom holes to be processed are formed at positions of ball holes 12 to be processed on the side surface of the plug cover, the two bottom holes are axisymmetric with respect to the center line of the plug cover 1, and the diameter of each bottom hole is 0.2mm smaller than the minimum inner diameter of the ball hole 12 formed by extrusion. The processed ball head hole 12 is used for being matched with a steel ball on the plug seat, the maximum diameter of the ball head hole 12 is smaller than that of the steel ball, and the inner edge surface of the ball head hole 12 is a spherical surface, so that the steel ball can be just matched with the ball head hole 12, but cannot fall out of the ball head hole 12.

As shown in fig. 3, the processing tool 2 includes:

the pressing component 21 is used for pressing the side wall of the plugging head cover 1 out of the ball hole 12;

a base 22, wherein a processing groove 221 is formed in the upper surface of the base 22, the processing groove 221 is used for bearing the plug cap 1, a processing hole 222 is formed in the inner wall of the processing groove 221, the diameter of the processing hole 222 is equal to the diameter of the outer side of the ball hole 12, and the processing hole is used for accommodating the side wall of the plug cap 1 extruded by the protrusion 2111; the center of the bottom of the processing groove 221 is provided with a square hole 223 matched with the bottom end of the pressure rod 23.

The bottom end of the pressure lever 23 is wedge-shaped, the inclined plane of the wedge-shaped bottom end is inclined downwards and respectively faces to the processing holes 222 on the two sides of the base 22, and when the pressure lever 23 is too long, the bottom end of the pressure lever can penetrate through the square hole 223.

The pressing block 24 is arranged above the base 22, a through hole 241 for the pressing rod 23 to pass through is formed in the top of the pressing block 24, a pressing groove 242 is formed in the bottom of the pressing block 24, and the pressing groove 242 is matched with the top of the plug cover 1 in shape.

As shown in fig. 4, wherein the pressing member 21 includes:

first extrusion piece 211, first extrusion piece 211 is semi-cylindrical, and its side curved surface is equipped with globular arch 2111, and its one side of keeping away from arch 2111 has extrusion face 2112, and extrusion face 2112 is the inclined plane, and sets up towards oblique top, cooperatees with the bottom of depression bar 23, extrusion face 2112 with the contained angle between the central line of depression bar 23 is less than or equal to 15. The smaller angle of the pressing surface 2112 makes it necessary to have a longer axial stroke to achieve the same radial stroke of the pressing member 21, thereby further improving the machining accuracy.

The first extrusion block 211 and the second extrusion block 212 have the same structure, are axisymmetric with respect to the center line of the pressure rod 23, and form a complete cylinder together with the first extrusion block 211.

The first bearing block 213, the first bearing block 213 is also semi-cylindrical, is arranged at the bottom of the first extrusion block 211, and the first extrusion block 211 and the first bearing block 213 are connected through a connecting block 214;

the second bearing block 215, the second bearing block 215 and the first bearing block 213 have the same structure, are axisymmetrical about the center line of the pressure rod 23, and form a complete cylinder together with the bearing blocks, the shape and size of the second bearing block are the same as those of the cover hole 11, the radius of the first bearing block 213 and the radius of the second bearing block 215 are equal to those of the cover hole 11, and the radius of the connecting block 214 is smaller than those of the first bearing block 213 and the second bearing block 215.

As shown in fig. 5 and 6, during assembly, the first bearing block 213 and the second bearing block 215 pass through the cover hole 11, and then the first bearing block 213 and the second bearing block 215 are slightly separated, so that the bottom of the plug cover 1 abuts against the top surfaces of the first bearing block 213 and the second bearing block 215, the top of the plug cover 1 abuts against the pressure groove 242, thereby limiting the displacement of the plug cover 1 in the axial direction and enabling the machining precision of the ball hole 12 to be higher, similarly, the bottom surfaces of the first bearing block 213 and the second bearing block 215 abut against the bottom surface of the machining groove 221, the top surfaces of the first pressing block 211 and the second pressing block 212 abut against the pressure groove 242, and limiting the displacement of the pressing member 21 in the axial direction and enabling the machining precision of the ball hole 12 to be higher.

Then, the wedge-shaped bottom of the pressing rod 23 abuts against the extrusion surface 2112, the pressing rod 23 presses downwards, the extrusion surface 2112 converts the vertical force into the horizontal force, so that the pressing rod 23 can push the extrusion component 21 to move horizontally, the first extrusion block 211 and the second extrusion block 212 both move towards the side wall of the plug cover 1, the spherical protrusion 2111 ejects the edge of the bottom hole into the processing hole 222, and the outer side wall of the plug cover 1 forms an annular convex edge. The inner diameter of the tooling hole 222 limits the extent of the protrusions 2111 on the spherical surface, and also limits the edges of the spherical surface so that the edges are smooth and burr-free. And then, the pressing rod 23 is removed, the extrusion part 21 is taken down, the plug cover 1 is taken out, and the annular convex edge on the outer side wall of the plug cover 1 is trimmed, so that the ball head hole 12 which is completely matched with the steel ball in a high-precision mode can be obtained.

On the basis of this embodiment, can also set up the stopper for the stroke of restriction punching machine further improves the machining precision of bulb hole 12.

In a second aspect, the present application further provides a method for machining a ball hole 12 of a plug cover 1 of the machining tool 2, including the following steps:

s1, placing the plug cover 1 into the processing groove 221, and aligning the bottom hole with the processing hole 222;

s2, placing the pressing component 21 into the plugging head cover 1, slightly separating the first pressing block 211 and the second pressing block 212, making the bottom of the plugging head cover 1 abut against the first bearing block 213 and the second bearing block 215, and aligning the protrusion 2111 with the bottom hole;

s3, abutting the end part of the pressure lever 23 on the extrusion surface 2112, and pressing down the pressure lever 23 to enable the bulge 2111 to extrude the bottom hole;

and S4, trimming the end face and the outer side face of the plug cover 1.

Optionally, before S1, the method further includes:

and (3) processing a bottom hole at the central position of the ball head hole 12 to be processed, processing the bottom holes of the uniformly distributed holes according to the uniformly distributed positions, wherein the size of the bottom hole is 0.2mm smaller than the minimum inner diameter hole formed by extruding the ball head hole 12.

Optionally, between S2 and S3, the method further includes:

the pressing block 24 is arranged on the base 22, and the bottom end of the pressing rod 23 penetrates through the through hole 241.

According to the processing tool 2 and the processing method for the ball head hole 12 of the plug cover 1, the pressing rod 23 is pressed downwards, the extrusion block 24 is pushed through the extrusion surface 2112, the protrusion 2111 is enabled to extrude the side wall of the plug cover 1, the side wall of the plug cover 1 protrudes outwards to form an annular edge, the protruding side wall is accommodated by the processing hole 222, the protruding side wall is cut and leveled, and the ball head hole 12 can be processed.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.