CN213888553U - Oblique aperture adds clamping apparatus - Google Patents

Abstract

The utility model discloses a machining clamp for inclined holes, which comprises a base, a clamp body, a positioning sleeve, a jacking piece, a first bolt and a plurality of second bolts, wherein the clamp body is provided with a machining surface and an installation surface; the included angle between the processing surface and the horizontal plane is A, the positioning sleeve and the jacking piece are fixedly installed on the processing surface, a first through hole is formed in the jacking piece, a first installation hole is formed in the processing surface, the first bolt penetrates through the first through hole and then is in threaded fit with the first installation hole, and therefore the jacking piece enables the workpiece to be tightly pressed on the positioning sleeve; the mounting surface is parallel to the horizontal plane, a plurality of second through holes are formed in the mounting surface, a plurality of fourth mounting holes are formed in the base, the second bolts penetrate through the second through holes and then are in threaded fit with the fourth mounting holes, and the second through holes are in clearance fit with the second bolts; through the technical scheme, the whole clamping process is quick, accurate and firm.

Description

Oblique aperture adds clamping apparatus

Technical Field

The utility model relates to the technical field of machinery, especially, relate to an oblique aperture adds clamping apparatus.

Background

In the process of cutting and machining metal parts, certain small holes (the diameter is less than or equal to 1mm) of the parts are often difficult to machine, a drill bit for machining is frequently broken in a workpiece, particularly, the inclined small holes are machined, the workpiece is very difficult to clamp, adjust and machine, and the production efficiency is low.

In the conventional machining method, a workpiece having a diagonal hole with a (a ═ 1mm) angle of B degrees is shown in fig. 1. When processing a small hole, an operator usually uses a scriber to mark the specific position of the small hole on a workpiece, then the workpiece is arranged on a universal dividing head, and after rotating for an angle B, the operator uses a twist drill to drill the hole at the position of the marked line. When a workpiece is clamped by a universal dividing head (universal tool), the workpiece can be adjusted to a correct position only after time is spent each time, and the situation that the drill bit is broken in the part is often caused because the hole diameter is small, the used twist drill bit is thin and poor in rigidity of the drill bit, and the drill bit needs to be carefully fed in the machining process, so that the machining time is long, and the distance H from the hole A to the end face of the part is difficult to guarantee because the drill bit is an inclined hole and the tool tip just touches the part, and the drill bit can be deviated.

Chinese patent publication No. CN208513804U discloses a fixture convenient for electric spark machining of an inclined hole of a throttle valve body, which comprises a base, wherein a positioning plate is arranged on one side of the upper end of the base, and a positioning pin for fixing the throttle valve body is arranged on the inclined surface of the upper end of the positioning plate, a supporting plate is arranged on the other side of the upper end of the base, a jacking member is fixedly connected to the upper end of the supporting plate, the jacking member is fixedly connected to the base through one end of a stud, the other end of the stud passes through the jacking member to be connected, and the tail end of the jacking member just abuts against the throttle valve body during use. Through the implementation of the clamp, the processing of the slender inclined hole of the throttle valve is solved, the position of the slender hole of the throttle valve is guaranteed, the phenomena of drift and incorrect position existing in drilling are avoided, and meanwhile, the problem of waste products caused by breakage of a drill bit of a workpiece is avoided.

The oblique small hole machining for the throttle valve body in the above document can also be applied to machining of the workpiece in fig. 1 and a general workpiece, which solves the technical problem that a drill bit is easy to drift when a traditional drill bit is used for machining an oblique small hole, but the positioning in the oblique small hole machining process is not guaranteed.

Disclosure of Invention

In order to solve the problem, the utility model aims to overcome the not enough of prior art, provide an oblique aperture adds clamping apparatus, this adds clamping apparatus can guarantee the accurate location of oblique aperture.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a processing clamp for an inclined small hole is characterized in that,

the clamp comprises a base, a clamp body, a positioning sleeve, a jacking piece, a first bolt and a plurality of second bolts, wherein the clamp body is provided with a processing surface and a mounting surface;

the included angle between the processing surface and the horizontal plane is A, the positioning sleeve and the jacking piece are fixedly installed on the processing surface, a first through hole is formed in the jacking piece, a first installation hole is formed in the processing surface, the first bolt penetrates through the first through hole and then is in threaded fit with the first installation hole, and therefore the jacking piece enables the workpiece to be tightly pressed on the positioning sleeve;

the mounting surface is parallel to the horizontal plane, a plurality of second through holes are formed in the mounting surface, a plurality of fourth mounting holes are formed in the base, the second bolts penetrate through the second through holes and then are in threaded fit with the fourth mounting holes, and the second through holes are in clearance fit with the second bolts.

Preferably, the clamp a is in the range of 15-75 °.

Preferably, the positioning sleeve is provided with a first positioning hole in clearance fit with the workpiece, the first positioning hole is provided with a notch, the workpiece includes an annular first positioning portion, the outer surface of the first positioning portion is in clearance fit with the first positioning hole, and the notch is located above the workpiece.

Preferably, a circle of first annular protrusion is further arranged on the side face of the workpiece, the end face of the first annular protrusion abuts against the positioning sleeve, and the other end face of the first annular protrusion abuts against the jacking piece.

Preferably, the positioning device is further provided with a diamond-shaped pin, the first annular bulge is provided with a second positioning hole, the outer circle part of the diamond-shaped pin extends into the second positioning hole, and the outer circle part of the diamond-shaped pin is flattened.

Preferably, the diamond-shaped pin is further provided with a second mounting hole, and the diamond-shaped pin is fixedly mounted on the clamp body through the second mounting hole in a matched manner with the fastener.

Preferably, the processing surface is further provided with a third positioning hole, the positioning sleeve is further provided with a third mounting hole and a cylindrical third positioning portion, the side wall of the third positioning portion is in clearance fit with the inner side wall of the third positioning hole, and the positioning sleeve is fixedly mounted on the clamp body through the third mounting hole and the fastener in a matched manner.

Preferably, the jacking part comprises a jacking portion and a supporting portion which are perpendicular to each other, the jacking portion and the supporting portion are fixedly connected or integrally formed, the supporting portion is movably mounted on the machining surface, the jacking portion is of a plate-shaped structure, the first through hole is located in the middle of the jacking portion, and the jacking portion presses the first annular protrusion on the positioning sleeve through the first bolt.

Preferably, the first gasket is further arranged and sleeved on the first bolt and located between the first bolt and the jacking piece.

Preferably, the clamp is further provided with a second gasket, and the second gasket is sleeved on the second bolt and is positioned between the second bolt and the clamp body.

The utility model has the advantages that:

1) the workpiece can be quickly installed on the positioning sleeve and the diamond pin and then is firmly pressed by the jacking part, so that the workpiece is ensured to be in an accurate position, the clamping time is only 20 seconds, and if the workpiece is clamped by the universal dividing head and is adjusted to the position of A degree, the clamping time is 100 seconds, and the clamping efficiency is improved by 5 times; the whole clamping process is quick, accurate and firm;

2) according to the electric spark principle, when the small hole is machined by adopting the electric spark, the tool electrode is not contacted with a workpiece, the tool electrode cannot be bent or broken in the machining process, the electrode can be fed quickly, and the small hole can be machined quickly. The drill bit is used for drilling small holes, the time for processing a workpiece is 20 minutes, the electric spark is used for processing the small holes, the time for processing a part is only 2 minutes, and the production efficiency is improved by 10 times;

3) when the small hole is machined by adopting the electric spark, the tool electrode copper tube is not in direct contact with a workpiece, the electrode cannot deviate when meeting an inclined plane, and the distance H from the small hole to the end face can be ensured.

Drawings

FIG. 1 is a schematic view of a workpiece according to the present invention;

FIG. 2 is a schematic view of a calibration sample of the present invention;

FIG. 3 is a schematic view of a calibration sample bore hole of the present invention;

FIG. 4 is a schematic view of a diamond pin of the present invention;

FIG. 5 is a schematic view of a position sleeve of the present invention;

FIG. 6 is a schematic view of the present invention as the machining fixture clamps a workpiece;

FIG. 7 is a schematic view of the present invention with a machining fixture clamping a calibration sample;

fig. 8 is a schematic view of the base, the clamp body and the jacking member of the present invention.

Description of reference numerals: 1. a base; 2. a clamp body; 3. a positioning sleeve; 4. a jacking member; 5. a first bolt; 6. a second bolt; 7. a workpiece; 8. calibrating a sample piece; 20. processing the dough; 21. a mounting surface; 40. a first through hole; 22. a first mounting hole; 23. a second through hole; 10. a fourth mounting hole; 30. a first positioning hole; 31. a notch; 70. a first positioning portion; 71. a first annular projection; 9. a diamond pin; 72. a second positioning hole; 90. a second mounting hole; 24. a third positioning hole; 32. a third mounting hole; 33. a third positioning part; 80. a second positioning portion; 81. a second annular projection; 82. an inclined small hole A; 73. a slant hole B; 83. a positioning column; 84. measuring the rod; 11. copper tubing.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

It should be noted that, in the present invention, the orientation in fig. 1 is taken as a reference, where the direction from the first annular protrusion to the first positioning portion is "rear", and the direction from the first positioning portion to the first annular protrusion is "front".

The first embodiment is as follows:

as shown in fig. 1-8, a clamp for machining an inclined small hole comprises a base 1, a clamp body 2, a positioning sleeve 3, a jacking member 4, a first bolt 5 and a plurality of second bolts 6, wherein the clamp body 2 is provided with a machining surface 20 and an installation surface 21;

an included angle between the processing surface 20 and a horizontal plane is A, the positioning sleeve 3 and the jacking piece 4 are fixedly installed on the processing surface 20, a first through hole 40 is formed in the jacking piece 4, a first installation hole 22 is formed in the processing surface 20, the first bolt 5 penetrates through the first through hole 40 and then is in threaded fit with the first installation hole 22, and therefore the jacking piece 4 enables the workpiece 7 to be tightly pressed on the positioning sleeve 3;

the mounting surface 21 is parallel to the horizontal plane, a plurality of second through holes 23 are formed in the mounting surface 21, a plurality of fourth mounting holes 10 are formed in the base 1, the second bolts 6 penetrate through the second through holes 23 and then are in threaded fit with the fourth mounting holes 10, and the second through holes 23 are in clearance fit with the second screws 6.

It is worth noting that the included angle a is numerically equal to the included angle B in the workpiece 7 as shown in fig. 1; i.e. the included angle a may range in value from 1 to 89 °; preferably between 15 and 75 deg..

In this embodiment, earlier with second bolt 6 and the 10 screw-thread fit of fourth mounting hole in order to carry out preliminary fixed to the anchor clamps body 2, at this moment, second bolt 6 does not sticis anchor clamps body 2, then through the setting to the mounted position of position sleeve 3 and the size of position sleeve 3 itself, can carry out initial positioning to the mounted position of appearance 8, install appearance 8 on position sleeve 3 through roof pressure piece 4 after, again to anchor clamps body 2 carry out four ascending fine settings in side by side, so that the copper pipe 11 of electric spark lathe aims at the oblique aperture of processing, again with second screw 6 compress tightly anchor clamps body 2, so set up, only need aim at oblique aperture position once, alright accomplish the batch processing of follow-up oblique aperture, the accuracy of location has been improved promptly, the process time has been practiced thrift again, machining efficiency has been promoted.

In this embodiment, the positioning sleeve 3 is provided with a first positioning hole 30 which is in clearance fit with the workpiece 7, the first positioning hole 30 is provided with a notch 31, the workpiece 7 includes an annular first positioning portion 70, an outer surface of the first positioning portion 70 is in clearance fit with the first positioning hole 30, and the notch 31 is located above the workpiece 7.

In this embodiment, a circle of first annular protrusion 71 is further disposed on a side surface of the workpiece 7, an end surface of the first annular protrusion 71 abuts against the positioning sleeve 3, and another end surface of the first annular protrusion 71 abuts against the abutting member 4.

With this arrangement, the movement of the workpiece 7 in six directions, i.e., up, down, left, right, and front and rear, is restricted.

Further preferably, a diamond pin 9 is further provided, a second positioning hole 72 is provided on the first annular protrusion 71, an outer circle portion of the diamond pin 9 extends into the second positioning hole 72, and the outer circle portion of the diamond pin 9 is flattened; the arrangement adopts a positioning principle of one surface and two pins to limit 6 degrees of freedom of the workpiece 7.

Further preferably, a second mounting hole 90 is further formed in the diamond pin 9, and the diamond pin 9 is fixedly mounted on the fixture body 2 through the second mounting hole 90 in cooperation with a fastener.

In this embodiment, the processing surface 20 is further provided with a third positioning hole 24, the positioning sleeve 3 is further provided with a third mounting hole 32 and a cylindrical third positioning portion 33, a side wall of the third positioning portion 33 is in clearance fit with an inner side wall of the third positioning hole 24, and the positioning sleeve 3 is fixedly mounted on the fixture body 2 through the third mounting hole 32 and the fastening member.

In this embodiment, the pressing member 4 includes a pressing portion and a supporting portion that are perpendicular to each other, the pressing portion and the supporting portion are fixedly connected or integrally formed, the supporting portion is movably mounted on the processing surface 20, the pressing portion is a plate-shaped structure, the first through hole 40 is located at the middle position of the pressing portion, and the pressing portion presses the first annular protrusion 71 onto the positioning sleeve 3 through the first bolt 5; specifically, the processing surface is further provided with a positioning hole, the supporting portion is located in the positioning hole, and the supporting portion can move along the axial direction of the positioning hole.

In this embodiment, a first gasket is further provided, and the first gasket is sleeved on the first bolt 5 and located between the first bolt 5 and the pressing member 4.

In this embodiment, a second gasket is further provided, and the second gasket is sleeved on the second bolt 6 and located between the second bolt 6 and the clamp body 2.

This is provided to prevent damage to the press 4 by the first bolt 5 and damage to the holder body 2 by the second bolt 6.

The machining method of the inclined small hole adopts the machining clamp, and comprises the following specific steps:

s1: the second bolt 6 is in threaded fit with the fourth mounting hole 10 to preliminarily fix the clamp body 2, wherein the preliminary fixation means that the second bolt 6 does not press the mounting surface 21 on the clamp body 2, namely the clamp body 2 still has a relatively small moving space in the front, back, left and right directions, so that the clamp body 2 can be finely adjusted conveniently;

s2: mounting the calibration sample 8 on a first positioning hole 30 in the positioning sleeve 3, and aligning the inclined small hole on the calibration sample 8 with a notch 31 on the first positioning hole 30;

s3: the calibration sample 8 is circumferentially fixed through the diamond-shaped pin 9; the top pressing piece 4 is used for completing axial fixation of the calibration sample piece 8;

s4: starting the machine tool, enabling the machine tool workbench to properly move along the X axis or the Y axis so as to enable the copper pipe 11 on the electric spark machine tool to be aligned with the inclined small hole A82 on the calibration sample 8 preliminarily, then finely adjusting the position of the clamp body 2 so as to enable the copper pipe 11 on the electric spark machine tool to be aligned with the inclined small hole A82 on the calibration sample 8, and then finishing final fixing on the clamp body 2; the fine adjustment is mainly carried out in a mode of lightly knocking the clamp body 2, and the final fixation means that the second screw 6 tightly presses the mounting surface 21 on the clamp body 2, so that the clamp body 2 cannot move any more;

s5: dismantling the calibration sample 8;

s6: installing a workpiece 7 to be machined in the positioning sleeve 3, and completing circumferential fixing of the workpiece 7 through a diamond pin 9; the axial fixation of the workpiece 7 is completed through the jacking part 4;

s7: starting the machine tool, feeding the copper pipe 11 downwards along the axial direction at a proper speed, and processing an inclined small hole B73 with a proper depth by adopting electric spark;

s8: the machined workpiece 7 is detached, and then steps S6 and S7 are repeated.

With the arrangement, the clamp and the clamping method in the embodiment can quickly mount the workpiece 7 on the positioning sleeve 3 and the diamond-shaped pin 9, and then the workpiece 7 is pressed firmly by the jacking part, so that the workpiece 7 is ensured to be at an accurate position, the clamping time is only 20 seconds, if the workpiece 7 is clamped by the universal dividing head and adjusted to the position of A degree, the clamping time is 100 seconds, and the clamping efficiency is improved by 5 times; the whole clamping process is quick, accurate and firm;

according to the principle of electric spark, when the small hole is machined by adopting the electric spark, the tool electrode is not contacted with the workpiece 7, the tool electrode cannot be bent or broken in the machining process, the electrode can be fed quickly, and the small hole can be machined quickly. The drill bit is used for drilling small holes, 20 minutes are needed for machining a workpiece 7, the electric spark is used for machining the small holes, only 2 minutes are needed for machining a part, and the production efficiency is improved by 10 times;

when the small hole is machined by adopting the electric spark, the tool electrode copper tube 11 is not in direct contact with the workpiece 7, the electrode cannot deviate when meeting an inclined plane, and the distance H from the small hole to the end face can be ensured.

In this embodiment, the diameter of the copper tube 11 is equal to the diameter of the inclined small hole B73.

In this embodiment, the calibration sample 8 includes an annular second positioning portion 80 and a cover plate, the cover plate extends to the periphery to form a second annular protrusion 81, the thickness and the diameter of the second positioning portion 80 are the same as those of the first positioning portion 70, the diameter and the thickness in the axial direction of the second annular protrusion 81 are the same as those of the first annular protrusion 71, and the distance from the front end surface of the first positioning portion 70 to the rear end surface of the first annular protrusion 71 is equal to the distance from the front end surface of the second positioning portion 80 to the rear end surface of the second annular protrusion 81.

More preferably, the outer diameters of the first positioning portion 70 and the second positioning portion 80 are both C, the distance from the rear end surface of the second positioning portion 80 to the front end surface of the second annular protrusion 81 is S, the distance from the rear end surface of the second positioning portion 80 to the center of the inclined small hole a82 is H, the distance from the rear end surface of the first positioning portion 70 to the center of the inclined small hole B73 is I, and H is equal to I, wherein the center of the inclined small hole a82 is the center of a hole on the outer side wall of the second positioning portion 80, and the center of the inclined small hole B73 is the center of a hole on the outer side wall of the first positioning portion 70.

In the present embodiment, the oblique small hole a82 in the calibration sample 8 is formed by machining with a coordinate boring machine.

In this embodiment, the specific processing steps of the oblique small hole a82 on the calibration sample 8 are as follows:

s1: fixing the calibration sample 8 on a horizontally arranged universal rotary disc, and rotating an external energy rotary disc by B degrees;

s2: abutting a measuring bar 84 with the diameter F against two positioning columns 83 with the diameter E of the calibration sample 8, wherein the two positioning columns 83 are positioned on the cover plate and on the horizontal line of the center of the second positioning part;

s3: finding out the foremost point G of the measuring rod 84 by using a dial indicator, and moving the center drill on the coordinate boring machine backwards by a distance K by taking the point G as a starting point;

s4: feeding downwards along the axial direction, firstly processing a small positioning point by using a central drill, then finishing finish machining by using a drill bit and then using a reamer;

wherein the content of the first and second substances,

the arrangement is that in order to ensure high precision of the inclined pinhole A82 on the calibration sample 8, namely, the precision including the position of the inclined pinhole A82 and the precision including the diameter size of the inclined pinhole, the position of the clamp is then positioned through the inclined pinhole A82 on the calibration sample 8, and therefore the processing of the inclined pinhole B73 on the workpiece 7 is realized.

It is to be noted that the small hole means a hole having a diameter of not more than 1 mm.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A clamp for processing a small inclined hole is characterized in that,

the clamp comprises a base (1), a clamp body (2), a positioning sleeve (3), a jacking piece (4), a first bolt (5) and a plurality of second bolts (6), wherein a processing surface (20) and an installation surface (21) are arranged on the clamp body (2);

an included angle between the processing surface (20) and the horizontal plane is A, the positioning sleeve (3) and the jacking piece (4) are fixedly installed on the processing surface (20), a first through hole (40) is formed in the jacking piece (4), a first installation hole (22) is formed in the processing surface (20), the first bolt (5) penetrates through the first through hole (40) and then is in threaded fit with the first installation hole (22), and therefore the jacking piece (4) enables the workpiece (7) to be tightly pressed on the positioning sleeve (3);

the mounting surface (21) is parallel to the horizontal plane, a plurality of second through holes (23) are formed in the mounting surface (21), a plurality of fourth mounting holes (10) are formed in the base (1), the second bolts (6) penetrate through the second through holes (23) and then are in threaded fit with the fourth mounting holes (10), and the second through holes (23) are in clearance fit with the second bolts (6).

2. An inclined small hole machining clamp according to claim 1, wherein the included angle A ranges from 15 degrees to 75 degrees.

3. An inclined small hole machining clamp as claimed in claim 1, wherein the locating sleeve (3) is provided with a first locating hole (30) which is in clearance fit with the workpiece (7), the first locating hole (30) is provided with a notch (31), the workpiece (7) comprises a first annular locating portion (70), the outer surface of the first locating portion (70) is in clearance fit with the first locating hole (30), and the notch (31) is located above the workpiece (7).

4. The inclined small hole machining clamp as claimed in claim 1, wherein a circle of first annular protrusion (71) is further arranged on the side surface of the workpiece (7), the end surface of the first annular protrusion (71) abuts against the positioning sleeve (3), and the other end surface of the first annular protrusion (71) abuts against the abutting member (4).

5. A small inclined hole machining clamp according to claim 4, characterized in that a diamond-shaped pin (9) is further arranged, a second positioning hole (72) is formed in the first annular protrusion (71), an outer circle portion of the diamond-shaped pin (9) extends into the second positioning hole (72), and the outer circle portion of the diamond-shaped pin (9) is flattened.

6. An inclined small hole machining clamp as claimed in claim 5, characterized in that the diamond-shaped pin (9) is further provided with a second mounting hole (90), and the diamond-shaped pin (9) is fixedly mounted on the clamp body (2) through the second mounting hole (90) in cooperation with a fastener.

7. The inclined small hole machining clamp as claimed in claim 1, wherein a third positioning hole (24) is further formed in the machining surface (20), a third mounting hole (32) and a cylindrical third positioning portion (33) are further formed in the positioning sleeve (3), a side wall of the third positioning portion (33) is in clearance fit with an inner side wall of the third positioning hole (24), and the positioning sleeve (3) is fixedly mounted on the clamp body (2) through the third mounting hole (32) and a fastener in a matched mode.

8. The inclined small hole machining clamp as claimed in claim 1, wherein the jacking member (4) comprises a jacking portion and a supporting portion which are perpendicular to each other, the jacking portion and the supporting portion are fixedly connected or integrally formed, the supporting portion is movably mounted on the machining surface (20), the jacking portion is of a plate-shaped structure, the first through hole (40) is located in the middle of the jacking portion, and the jacking portion presses the first annular protrusion (71) onto the positioning sleeve (3) through the first bolt (5).

9. The inclined small hole machining clamp as claimed in claim 1, further comprising a first gasket, wherein the first gasket is sleeved on the first bolt (5) and located between the first bolt (5) and the jacking member (4);

the clamp is further provided with a second gasket, and the second gasket is sleeved on the second bolt (6) and is positioned between the second bolt (6) and the clamp body (2).

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