CN102689030A - Method for machining central hole of regular octahedron workpiece and special clamp thereof - Google Patents

Abstract

The invention relates to a processing method for the center hole of a regular octahedron workpiece and a special fixture thereof. The processing method utilizes that any pair of opposite end faces of the regular octahedron are parallel to each other, and the projection of the regular octahedron entity to any equilateral triangular end face is the same. Connected to the structural characteristics of the circumscribed circle of the end face of the regular triangle, the regular octahedron workpiece is clamped by a sleeve with the diameter of the inner hole equal to the diameter of the circumscribed circle of the regular octahedron workpiece, so that when the regular octahedron workpiece is laid flat When it is loaded into the round hole of the clamp body, the inner wall of the sleeve can surround the six corners of the upper and lower regular triangular end faces of the regular octahedron workpiece, and then the octahedron The workpiece is clamped in the sleeve, and multiple regular octahedral workpieces are clamped each time. The sum of the heights of the workpieces is slightly greater than the height of the round hole, so that the drill bit can pass through the through hole opened on the axial limit. A center hole is drilled on the workpiece.

Description

The Machining Method of the Center Hole of the Octahedron Workpiece and Its Special Fixture

technical field

The invention relates to a processing method for a central hole of a regular octahedron workpiece used in the technical field of mechanical processing, and also relates to a fixture specially used for the processing method of the regular octahedron workpiece.

Background technique

Because the six-contained and eight-cavity pressure device can obtain a larger pressure range, the six-contained and eight-cavity pressure device plays an important role in the study of the structure, phase transition, and physical and chemical properties of materials under extreme conditions. Experiments The pressure transmission medium used for encapsulating the sample is a regular octahedron workpiece sintered by pyrophyllite or MgO, so it is necessary to punch a small round hole in the octahedron, and install the sample in the small round hole for the experiment.

However, due to the special geometric shape of the octahedron workpiece, it is not easy to process the required small round hole, that is, the center hole, on the octahedron workpiece whether it is a lathe or a bench drill, especially when drilling with a bench drill. There will be a phenomenon that the operator uses his hand as a fixing fixture, which makes the drilling process quite unsafe, and the center hole that is polished is often deflected or a trumpet hole is drilled, resulting in an increase in the processing error of the center hole. However, using these regular octahedral workpieces with large processing errors for high-temperature and high-pressure material experiments will greatly reduce the repeatability and safety of the experiment, and the accuracy of the experimental results will also be greatly reduced, and the possibility of firing octahedral workpieces will be reduced. A substantial increase will cause a lot of waste of financial and material resources, and even casualties.

Contents of the invention

The invention proposes a processing method for processing the center hole of a regular octahedron workpiece by utilizing the unique structural characteristics of the regular octahedron workpiece, and also relates to a fixture specially used for the processing method of the center hole of the regular octahedron workpiece, aiming to solve the problem of using the prior art When drilling the center hole of the experimental sample used for the filling pressure test on the regular octahedron workpiece, the problem of large machining error of the center hole.

The technical scheme of the processing method of the center hole of the regular octahedron workpiece is as follows:

A method for processing a central hole of a regular octahedron workpiece, the processing method comprising the following steps,

(1) Put a plurality of octahedron workpieces flat into the inner hole of the sleeve for clamping the octahedron workpiece, the diameter of the inner hole of the sleeve is equal to the diameter of the circumscribed circle of the regular triangle end face of the octahedron workpiece , and make the axis of the inner hole of the sleeve perpendicular to the plane where the regular triangular end faces of the top and bottom ends of the octahedron workpiece are located, so that the hole wall of the inner hole of the sleeve is in the radial direction of the sleeve and the positive plane of the top and bottom ends of the octahedron workpiece The limit fit of the six vertices of the triangular end face;

(2), use the axial limit device to axially limit the regular triangle end faces of the top and bottom ends of the regular octahedron workpiece in the axial direction of the sleeve;

(3) After the drill bit passes through the corresponding through holes provided on the axial stopper, the center hole is processed on the octahedron workpiece through the top and bottom two equilateral triangle end surfaces of the octahedron workpiece.

At least two regular octahedron workpieces are stacked in the sleeve along the axial direction of the inner hole of the sleeve, and the opposite end surfaces of two adjacent regular octahedron workpieces are attached to each other.

The technical scheme of the fixture specially used in the processing method of the center hole of this regular octahedron workpiece is as follows:

The special fixture includes a clamping body for installing a regular octahedron workpiece. The clamping body is provided with a round hole with a diameter equal to the diameter of the circumscribed circle of the regular triangular end face of the regular octahedron workpiece. The clamping body is provided with a hole for The axial direction of the circular hole clamps the octahedron workpiece in the clamp body, and the axial limit device is provided with a through hole for the drill bit to pass through when machining the center hole on the octahedron workpiece .

The circular hole has an axial length such that part of the regular octahedron workpiece at the outermost end among the at least two regular octahedron workpieces clamped in the clamp body is exposed from the end of the clamp body.

The circular hole has an axial length such that the end surface of the regular octahedron workpiece clamped in the clamp body is exposed from the end of the clamp body, and the two axial limit devices are respectively the hole walls at one end of the circular hole The stepped surface protruding above and the cylindrical cover at the other end of the round hole installed on the clamp body, the peripheral wall of the cylindrical cover is provided with a connecting structure for detachable and fixed connection with the clamp body, the cylindrical cover One end of the cover body is provided with a blocking plate for sealing its opening, and the through hole is opened on the blocking plate and the step surface.

A gasket is arranged between the cover body and the clip body, and a gasket hole communicating with the through hole is opened on the gasket.

The clamp body is integrally connected with a cylindrical or square column-shaped clamping handle located at one end of the circular hole provided with a stepped surface.

The clamping handle is provided with a chip removal hole which communicates with the through hole provided on the step surface for discharging debris generated by the drill bit during the drilling process of a regular octahedron workpiece.

The chip removal hole is a trumpet hole whose diameter gradually increases along the direction away from the clamp body.

The present invention adopts the structural characteristic that the opposite end faces of the regular octahedron are parallel to each other, and the projection of the regular octahedron entity on one end face is in the circumscribed circle of the triangular end face of the side. Sleeves with the same circular diameter are used to clamp the octahedron workpiece, so that when the octahedron workpiece is squarely loaded into the inner hole of the clamp body, the inner wall of the sleeve can surround the outer circumference of the octahedron workpiece, aligning the eight The surface workpiece is radially limited along the inner hole of the sleeve and acts on the top and bottom triangular end faces of the octahedron workpiece, and then the octahedron workpiece is clamped by the axial limit devices set at both ends of the sleeve. Tightly in the sleeve, the workpiece larger than the regular octahedron acts axially on the triangular end faces of the top and bottom ends of the regular octahedron workpiece along the inner diameter of the sleeve, so that the drill bit can pass through the axial limit Drill a center hole on the regular octahedron workpiece after opening the through hole.

Description of drawings

Fig. 1 is the structural representation of regular octahedron workpiece;

Fig. 2 is the schematic diagram of the three-dimensional structure of the cover body in Embodiment 1 of the special fixture of the processing method of the center hole of the octahedral workpiece center hole of the present invention;

Fig. 3 is the three-dimensional structure schematic diagram of clamping body in the embodiment 1 of the special clamp of the processing method of the center hole of regular octahedral workpiece center hole of the present invention;

Fig. 4 is the front view of the cover in Embodiment 1 of the special fixture of the processing method of the center hole of the regular octahedron workpiece of the present invention;

Fig. 5 is the front view of the clamp body in Embodiment 1 of the special clamp for the processing method of the center hole of the octahedron workpiece of the present invention;

Fig. 6 is the three-dimensional structural representation of the stacked octahedral workpieces in Fig. 2 when the octahedral workpieces are stacked in the furniture body;

Fig. 7 is the front view of Fig. 6;

Fig. 8 is a schematic perspective view of the three-dimensional structure of the clamp body in Embodiment 2 of the special clamp for the machining method of the center hole of a regular octahedron workpiece according to the present invention.

Detailed ways

Embodiment of the processing method of the center hole of the regular octahedron workpiece of the present invention: the processing method of the center hole of the regular octahedron workpiece, the processing method comprises the following steps,

(1) Put a plurality of octahedron workpieces flat into the inner hole of the sleeve for clamping the octahedron workpiece, the diameter of the inner hole of the sleeve is equal to the diameter of the circumscribed circle of the regular triangle end face of the octahedron workpiece , and make the axis of the inner hole of the sleeve perpendicular to the plane where the regular triangular end faces of the top and bottom ends of the octahedron workpiece are located, so that the hole wall of the inner hole of the sleeve is in the radial direction of the sleeve and the positive plane of the top and bottom ends of the octahedron workpiece The limit fit of the six vertices of the triangular end face;

(2), use the axial limit device to axially limit the regular triangle end faces of the top and bottom ends of the regular octahedron workpiece in the axial direction of the sleeve;

(3) After the drill bit passes through the corresponding through holes provided on the axial stopper, the center hole is processed on the octahedron workpiece through the top and bottom two equilateral triangle end surfaces of the octahedron workpiece.

At least two regular octahedron workpieces are stacked in the sleeve along the axial direction of the inner hole of the sleeve, and the opposite end surfaces of two adjacent regular octahedron workpieces are attached to each other.

This processing method can be realized by the following special fixtures:

Embodiment 1 of the special fixture of the processing method of the center hole of the regular octahedron workpiece of the present invention: as shown in Figure 1 to Figure 7, the fixture includes a clamp body 1, and the clamp body 1 is provided with a regular octahedron workpiece 5 with a diameter dimension A round hole 3 with the same diameter and size as the circumscribed circle of the triangular end face. The inner wall of one end of the round hole 3 is provided with a stepped surface. The clamp body 1 is equipped with a cover body 2 at the other end of the round hole 3. A blocking plate 7 for sealing the opening is provided, and a through hole 8 for the drill bit to pass through is provided on the blocking plate 7 and the step surface respectively when drilling.

The setting end of the clamp body 1 provided with a stepped surface is integrally connected with a cylindrical clamping handle 9, and a chip removal hole 10 communicating with the through hole is opened in the clamping handle 9. The horn hole gradually increases in the direction of the clamp body.

The outer circumference of the clamp body 1 is protruded with an annular convex edge 4, and the cover body 2 is coaxially sleeved on the outer circumference above the annular convex edge 4 of the clamp body 1, and on the peripheral wall of the cylindrical cover body 2 and the annular convex edge. Holes for screws extending in the axial direction that are evenly distributed in the circumferential direction of the cover body 2 and the clamp body 1 are correspondingly opened along the edge 4 .

The axial length of the circular hole 3 is less than the sum of the flat heights of the four octahedron workpieces 5 installed in the clamp body, that is, the axial length of the large hole section of the stepped hole 3 is less than that of the four octahedron workpieces 5. The sum of the distances of the opposite end faces of each regular octahedron workpiece 5, but greater than the sum of the horizontal heights of the three regular octahedron workpieces 5, makes the axial length of the circular hole 3 ensure that four clamps installed in the clamp body 1 The octahedron workpiece 5 is in a state where the uppermost part of the octahedron workpiece 5 is exposed from the upper end of the clamp body 1 .

When in use, since the regular octahedron workpiece 5 is placed flat (as shown in Figure 1), the projection of the regular octahedron workpiece 5 on the plane where any regular triangle end face is located is within the circumscribed circle of the side regular triangle end face, the operator can respectively Put four regular octahedron workpieces 5 into the clamp body 1 in a manner of laying flat and superimposed one after another, then set the cover body 2 on the outer periphery of the upper end of the clamp body 1, and screw a screw 6 in the screw hole, Make the lower end surface of the blocking plate on the cover body 2 and the top end surface 501 of the uppermost regular octahedron workpiece 5 fit together, and the bottom end surface 502 of the lowermost regular octahedron workpiece 5 stick to the stepped surface protruding from the other end of the round hole 3 Then continue to tighten the screw 9, so that the regular octahedron workpiece 5 is clamped in the round hole 3 of the clamp body 1, and then the clamping handle 9 integrally connected on the clamp body 1 can be inserted into the three jaws of the lathe, through the control The clamping of the three jaws makes the fixture and the regular octahedron workpiece 5 be clamped on the lathe, and finally, the turning tool on the lathe can pass through the guide through hole 8 on the blocking plate 7 of the cover body 2 to process the regular octahedron The center hole of workpiece 5.

Embodiment 2 of the special fixture for the processing method of the center hole of the regular octahedral workpiece of the present invention: as shown in Figure 8, the difference between this embodiment and Embodiment 1 is that the clamping handle 29 integrally connected on the clamp body 21 is a square column , thus enabling the clamp body 21 to be better clamped on the vise through the clamping handle 29, so that the clamp can be fixed on the drilling machine, and then the center hole on the regular octahedron workpiece 5 is processed by the drilling machine.

The invention can not only tightly fix the octahedron workpiece in the cavity of the clamp body, so that the center hole processed on the octahedron has precise dimensions, but also can fill 4-8 octahedrons at one time, greatly improving the processing efficiency, and Depending on the shape of the rod tail, you can also choose to use it on a lathe or a bench drilling machine. The operation is simple, convenient, safe and reliable.

In the above-mentioned embodiment, the round hole on the clamp body 1 can install four regular octahedron workpieces at one time, and in other embodiments, the round hole on the clamp body can also install one to three or more than four regular octahedron workpieces at a time , the axial length of the corresponding circular hole on the fixture body is set according to the specific quantity and size of the regular octahedron workpieces to be installed, so that the fixture can be adapted to different processing needs.

In the above embodiments, the cover body is a cylindrical structure that can be sleeved on the upper end of the clamp body. In other embodiments, the shape of the cover body can also be a square tube structure, but the inner hole is still cylindrical.

In the above-mentioned embodiment, the axial length of the round hole on the clamp body is less than the sum of the flat heights of all the regular octahedron workpieces installed in it, in other embodiments, the axial length of the round hole on the clamp body 1 is also It can be greater than the sum of the horizontal heights of all the octahedron workpieces installed in it. Correspondingly, the cover body is a plug connected to the upper end of the round hole by coaxial threads. The upper side fits snugly.

In the above embodiments, the chip removal hole opened in the clamping handle is a trumpet hole, and in other embodiments, the chip removal hole may also be a straight hole.

In the above-mentioned embodiment, the axial limit device for clamping the octahedron workpiece inside the clamp body is the step surface provided at one end of the circular hole on the clamp body for installing the octahedron workpiece and the other end For the provided cover body, in other embodiments, the inner hole of the clamp body may also be a circular straight hole, and the corresponding axial limiting devices at both ends of the clamp body may be plugs or cylindrical covers.

Claims (9)

1. the processing method in a regular octahedron workpiece centre hole, it is characterized in that: this processing method may further comprise the steps,

(1), a plurality of regular octahedron workpiece is kept flat the endoporus of the sleeve that is used for clamping regular octahedron workpiece; The diameter of bore size of this sleeve equates with the size of the equilateral triangle end face circumscribed circle diameter of regular octahedron workpiece; And the axis that makes the sleeve endoporus is vertical with the plane at the equilateral triangle end face place of regular octahedron workpiece top and bottom ends, thus make the hole wall of sleeve endoporus in the footpath of sleeve upwards with six spacing cooperations of summit of equilateral triangle end face of the top and bottom ends of regular octahedron workpiece;

(2), use axially stop block equilateral triangle end face to the top and bottom ends of regular octahedron workpiece on the axial direction of sleeve to carry out axial limiting;

(3), drill bit passes behind the through hole that the correspondence on the said axially stop block offers that processing connects the top of regular octahedron workpiece, the centre bore of the end two equilateral triangle end faces on the regular octahedron workpiece.

2. the processing method of regular octahedron centre bore according to claim 1 is characterized in that: in the said sleeve along its endoporus axially stacked at least two regular octahedron workpiece, the opposing end surface of adjacent two regular octahedron workpiece is fitted each other.

3. be exclusively used in and implement the anchor clamps of method according to claim 1; It is characterized in that: comprise the clamp body that is used to install the regular octahedron workpiece; Offer the equal circular hole of circumscribed circle diameter size of the equilateral triangle end face of diameter dimension and regular octahedron workpiece on the said clamp body; Said clamp body is provided with and is used for along the axial of said circular hole the regular octahedron workpiece being clamped in the axially stop block in the clamp body, the through hole that supplies drill bit to pass through when offering the centre bore that is used on processing regular octahedron workpiece on the said axially stop block.

4. anchor clamps according to claim 3 is characterized in that: said circular hole has the axial length that the part entity that is in the regular octahedron workpiece of outermost one end at least in two regular octahedron workpiece that make clamping in the said clamp body exposes from the end of clamp body.

5. anchor clamps according to claim 3; It is characterized in that: said circular hole has the axial length that the end face that makes the regular octahedron workpiece of clamping in the said clamp body exposes from the end of clamp body; Said two axially stop blocks are respectively the tubular lid of installing on the step surface that is convexly equipped with on the hole wall of an end of said circular hole and the clamp body that is in the circular hole other end; The perisporium of said tubular lid is provided with and is used for the syndeton that detachably is fixedly connected with clamp body; One end of said tubular lid is provided with the shutoff plate that is used to seal up its opening, and said through hole is opened on said shutoff plate and the step surface.

6. anchor clamps according to claim 5 is characterized in that: be provided with pad between said lid and the clamp body, offer the pad hole that is communicated with said through hole on the said pad.

7. anchor clamps according to claim 5 is characterized in that: integraty is connected with the grip shank that is in the cylindric or flat column that is provided with step surface one end in the said circular hole on the said clamp body.

8. anchor clamps according to claim 7 is characterized in that: offer on the said grip shank with said step surface on the through hole offered be communicated with the chip-removal hole that the chip that in the boring procedure of regular octahedron workpiece, produces for drill bit is discharged.

9. anchor clamps according to claim 8 is characterized in that: said chip-removal hole is the bellmouth orifice that the aperture increases along the direction away from clamp body gradually.

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