CN222920069U - Positioning tool and processing equipment - Google Patents

Abstract

The utility model provides a positioning tool and processing equipment, relates to the technical field of positioning in processing, and aims to solve the problem that the posture of a workpiece is not easy to adjust. The positioning tool comprises a base, a first rotating mechanism, a second rotating mechanism and a clamping mechanism, wherein the base is used for being fixed at a processing station, the first rotating mechanism and the base are arranged in a relative rotation mode along a first rotating axis, the second rotating mechanism and the first rotating mechanism are arranged in a relative rotation mode along a second rotating axis, the first rotating axis is perpendicular to the second rotating axis, and the clamping mechanism is arranged on the second rotating axis and is configured to clamp a workpiece together with the second rotating mechanism. Which can facilitate adjustment of the attitude of the workpiece.

Description

Positioning tool and processing equipment

Technical Field

The utility model relates to the technical field of positioning in machining, in particular to a positioning tool and machining equipment.

Background

The automobile parts are taken as the basis of the automobile industry and are necessary factors for supporting the continuous healthy development of the automobile industry. The technical innovation of the whole automobile needs parts as a basis, the innovation of the parts generates strong driving force for the development of the whole automobile industry, the parts are mutually influenced and interacted, and the automobile part processing is a product for forming the whole automobile part processing unit and serving the automobile part processing.

CN217914864U discloses an electromechanical location frock of convenient centre gripping, including workstation 1, support frame 2, rectangular plate 3, trapezoidal piece 4, cylinder 5, connecting plate 6, rectangular frame 7, slide column 8, slider 9, grip block 10, there is support frame 2 in the bottom fixed surface connection of workstation 1, and there is rectangular plate 3 at the top fixed surface connection of workstation 1, there is trapezoidal piece 4 at the top fixed surface connection of workstation 1, and there is cylinder 5 at the inboard fixed surface connection of workstation 1, there is connecting plate 6 at the inboard fixed surface connection of cylinder 5, and there is rectangular frame 7 inboard fixed surface connection of connecting plate 6, there is slide column 8 at the inboard fixed surface connection of rectangular frame 7, and there is slider 9 at the surface sliding connection of slide column 8, there is grip block 10 at the inboard fixed surface connection of rectangular frame 7, there is bearing 11 at the inboard fixed surface connection of bearing 11, and there is lead screw 12, the surface of lead screw 12 is nut seat 13, and there is rotation handle inboard 14 at fixed surface connection of lead screw 12, and there is rectangular frame 15 at the inside fixed surface connection of connecting plate 5, form a limit block 4 with the fixed surface of trapezoidal piece 1 through welding structure and rectangular frame 4, form a body with the fixed structure 4 through the fixed surface of a limit block 1, the fixed structure is formed with the rectangular frame 4 at the end of the fixed surface of the rectangular frame 7, and the fixed structure is welded connection of the rectangular frame 4.

However, the fixture has the following problems that the fixture is required to be used for fixing the part to be processed in the processing process of the automobile metal part, and the part is not convenient to adjust in the processing process in the using process. If the parts are required to be repeatedly disassembled to be processed at all positions, the parts are inconvenient to use.

Disclosure of utility model

The first object of the utility model is to provide a positioning tool, which solves the technical problem that the existing workpiece posture is not easy to adjust.

The utility model provides a positioning tool, which comprises:

the base is used for being fixed at a processing station;

the first rotating mechanism and the base are arranged in a rotating way along a first rotating axis;

A second rotation mechanism which is arranged along a second rotation axis relative to the first rotation mechanism, the first rotation axis is perpendicular to the second rotation axis, and

And the clamping mechanism is arranged on the second rotation axis and is configured to clamp a workpiece together with the second rotation mechanism.

The positioning tool has the beneficial effects that:

through setting up first slewing mechanism can rotate with the base relatively, set up second slewing mechanism and first slewing mechanism relative rotation, can utilize fixture on the second slewing mechanism and the common centre gripping work piece of second mechanism, can make the work piece can realize the rotation along the pivot of two vertical axis, be convenient for make the work piece be in different attitudes to process it, improve machining efficiency.

In an optional technical scheme, the second rotating mechanism is provided with a movable guide rail, the clamping mechanism comprises a clamping moving assembly, a clamping driving assembly and a clamping action assembly, the clamping moving assembly is matched with the movable guide rail and is configured to move on the movable guide rail, the clamping driving assembly is mounted on the clamping moving assembly, and the clamping driving assembly is used for driving the clamping action assembly to move towards the second rotating mechanism and move away from the second rotating mechanism.

In an alternative technical scheme, the second rotating mechanism comprises a rotary table, the rotary table is provided with a limiting groove, the clamping driving assembly comprises a telescopic driving piece, the telescopic driving piece is fixedly arranged at the power output end of the clamping moving assembly, the clamping moving assembly is positioned at the first side of the rotary table, the clamping action assembly is positioned at the second side of the rotary table, and the first side and the second side are opposite sides of the rotary table.

In an alternative technical scheme, the clamping moving assembly comprises a sliding block and a linear driving piece, wherein the linear driving piece is connected with the sliding block, and the sliding block is in sliding connection with the limiting groove.

In an alternative technical scheme, the clamping action assembly comprises a connecting piece, a clamping plate and a compression spring, wherein the connecting piece is connected with the power output end of the telescopic driving piece, and the compression spring is arranged between the clamping plate and the connecting piece.

In an optional technical scheme, the second rotating mechanism further comprises a supporting frame and a second rotating shaft, the supporting frame is a box body with one surface open, the rotary table is arranged on the open side of the box body, and the second rotating mechanism is connected with the first rotating mechanism through the second rotating shaft.

In an optional technical scheme, the second rotating mechanism further comprises a baffle plate, and the baffle plate is arranged on the turntable and located in the extending direction of the limiting groove.

In an optional technical scheme, the first rotating mechanism comprises a first rotating shaft and a connecting frame, the connecting frame is fixedly connected with the second rotating shaft, and the first rotating shaft is rotationally connected with the base.

In an optional technical scheme, the connecting frame extends along a semicircular arc line, the second rotation axis is located at the end part of the semicircular arc line, and the first rotation axis intersects with the middle part of the semicircular arc line.

The second object of the present utility model is to provide a processing apparatus, so as to solve the technical problem that the posture of the workpiece is not easy to adjust.

The processing equipment provided by the utility model comprises the positioning tool.

By arranging the positioning tool in the processing equipment, the processing equipment has all the advantages of the positioning tool, and therefore the positioning tool is not described in detail.

Drawings

In order to more clearly illustrate the technical solutions of embodiments or background art of the present utility model, the drawings that are needed in the description of the embodiments or background art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic overall perspective view of an electromechanical positioning tool according to the background art;

FIG. 2 is a schematic front view of an electromechanical positioning tool according to the background art;

FIG. 3 is a schematic top view of an electromechanical positioning tool according to the background art;

fig. 4 is a schematic structural diagram of a rectangular frame in the electromechanical positioning tool mentioned in the background art;

fig. 5 is a schematic structural diagram of a positioning tool according to a first embodiment of the present utility model;

Fig. 6 is a schematic structural diagram of a positioning tool according to a first embodiment of the present utility model viewed from another direction;

fig. 7 is a schematic structural diagram of a clamping mechanism and a second rotating mechanism in a positioning tool according to an embodiment of the present utility model.

Reference numerals illustrate:

100-base, 110-positioning hole;

200-a first rotating mechanism, 210-a connecting frame and 220-a first rotating shaft;

300-second rotating mechanism, 310-turntable, 311-limit groove, 320-support frame, 330-baffle plate and 340-second rotating shaft;

400-clamping mechanism, 411-telescopic driving piece, 420-clamping action component, 421-connecting piece, 422-clamping plate, 423-compression spring, 430-clamping moving component, 431-sliding block and 432-linear driving piece;

501-a first axis of rotation and 502-a second axis of rotation.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Embodiment one:

Fig. 5 is a schematic structural diagram of a positioning tool according to a first embodiment of the present utility model, and fig. 6 is a schematic structural diagram of the positioning tool according to the first embodiment of the present utility model, viewed from another direction, wherein fig. 1 and fig. 2 omit the structure of the clamping mechanism. As shown in fig. 1-2, a positioning tool according to a first embodiment of the present utility model includes a base 100 for being fixed at a processing station, a first rotating mechanism 200 rotatably disposed along a first rotation axis 501 with respect to the base 100, a second rotating mechanism 300 rotatably disposed along a second rotation axis 502 with respect to the first rotating mechanism 200, the first rotation axis 501 being perpendicular to the second rotation axis 502, and a clamping mechanism 400 disposed on the second rotation axis 502 and configured to clamp a workpiece together with the second rotating mechanism 300.

In this embodiment, the base 100 is provided with a plurality of positioning holes 110, and the positioning holes 110 may pass through a male threaded connection member 421 such as a screw or a bolt to fix the base 100 on a processing station of a corresponding apparatus.

Through setting up first slewing mechanism 200 can rotate relatively with base 100, set up second slewing mechanism 300 and first slewing mechanism 200 and rotate relatively, can utilize fixture 400 on the second slewing mechanism 300 and second mechanism centre gripping work piece jointly, can make the work piece can realize the rotation along the pivot of two vertical axis, be convenient for make the work piece be in different attitudes to process it, improve machining efficiency.

Fig. 7 is a schematic structural diagram of a clamping mechanism and a second rotating mechanism in a positioning tool according to a first embodiment of the present utility model, where, as shown in fig. 5 to fig. 7, optionally, the second rotating mechanism 300 is provided with a moving rail, and the clamping mechanism 400 includes a clamping moving component 430, a clamping driving component and a clamping action component 420, where the clamping moving component 430 is matched with the moving rail, the clamping moving component 430 is configured to move on the moving rail, and the clamping driving component is mounted on the clamping moving component 430, and the clamping driving component is used for driving the clamping action component 420 to move towards the second rotating mechanism 300 and move away from the second rotating mechanism 300.

The clamping moving assembly 430 is an assembly that moves the clamping driving assembly and the clamping action assembly 420 on the surface of the second rotating mechanism 300, and is not a movement that generates the clamping action itself. And the clamping drive assembly is configured to move the clamping assembly 420 toward and away from the second rotational mechanism 300 sufficient to create a clamping action. And the clamping assembly 420 is configured to contact the workpiece to clamp the workpiece in cooperation with the second rotation mechanism 300.

Through setting up centre gripping mobile unit 430, can make centre gripping drive assembly and centre gripping effect subassembly 420 remove on second rotary mechanism 300 to can realize carrying out the centre gripping fixed to the work piece in a plurality of positions, in order to adapt to the different work piece of size shape, thereby improved the application scope of this location frock, also reduced manufacturing cost simultaneously.

As shown in fig. 5 and 7, optionally, the second rotating mechanism 300 includes a turntable 310, the turntable 310 is provided with a limiting slot 311, the clamping driving assembly includes a telescopic driving member 411, the telescopic driving member 411 is fixedly mounted at a power output end of the clamping moving assembly 430, the clamping moving assembly 430 is located at a first side of the turntable 310, the clamping acting assembly 420 is located at a second side of the turntable 310, and the first side and the second side are opposite sides of the turntable 310.

In this embodiment, the turntable 310 is substantially circular, and the limiting groove 311 is disposed along the diameter of the circular shape. It is apparent that the retaining groove 311 may not completely bisect the turntable 310, i.e., the retaining groove 311 may not extend along the entire length of the diameter. Specifically, in the present embodiment, the limiting groove 311 is on the turntable 310, most of which is located on one side of the center of the circle, and the other side of the center of the circle.

Specifically, in this embodiment, the telescopic driving member 411 may be a pneumatic telescopic member, such as an air cylinder, or an electric telescopic member, such as an electric push rod or a linear module. The extending direction of the extending driving member 411 is perpendicular to the length direction of the limiting slot 311, and the extending direction of the extending driving member 411 is the thickness direction of the turntable 310.

Through set up spacing groove 311 on carousel 310 to make flexible driving piece 411 and the centre gripping that is located spacing groove 311 opposite side remove subassembly 430 fixed connection, can make spacing groove 311 strengthen the spacing effect of flexible driving piece 411, improve the stability that the centre gripping driving subassembly removed.

As shown in fig. 5 and 7, alternatively, the clamping moving assembly 430 includes a slider 431 and a linear driving member 432, the linear driving member 432 is connected to the slider 431, and the slider 431 is slidably connected to the limiting groove 311.

The slider 431 in the present embodiment may be in an i-shape when viewed from the right side of the diagram shown in fig. 7, and the i-shaped portion is located on the first side of the limiting groove 311, and the i-shaped portion is located on the second side of the limiting groove 311, so that the slider 431 and the limiting groove 311 can be positioned in the direction from the first side to the second side. Of course, the i-shaped slider 431 may not be an integrally formed part, and may be, for example, two parts joined by a male threaded connection such as a screw or bolt.

Specifically, in this embodiment, the linear driving member 432 may be a pneumatic telescopic member, such as a cylinder, or an electric telescopic member, such as an electric push rod or a linear module.

The linear driving member 432 drives the slide block 431, if the linear driving member 432 is a cylinder, a control valve, not shown, can be connected, the position of the clamping driving assembly can be determined by changing the state of the control valve, and if the linear driving member 432 is an electric component such as an electric push rod, the movement of the electric push rod can be controlled by an electric signal, so that the clamping driving assembly can be accurately positioned.

As shown in fig. 7, alternatively, the clamping action assembly 420 includes a connection member 421, a clamping plate 422, and a compression spring 423, the connection member 421 being connected to the power output end of the telescopic driving member 411, the compression spring 423 being provided between the clamping plate 422 and the connection member 421.

The connecting member 421 may be a plate-like or rod-like member provided at the power output end of the telescopic driving member 411, and one end of the plate-like or rod-like connecting member 421 is fixedly connected to the power output end, for example, may be connected to a threaded portion of a piston rod of the cylinder. The clamping plate 422 is movably disposed with the connecting member 421 by passing a rod-shaped member through the end of the connecting member 421, for example, a bolt may be screwed with the threaded hole of the clamping plate 422, the bolt head of the bolt is disposed in the counter bore of the clamping plate 422 facing the side of the second rotation mechanism 300, and the bolt head does not protrude from the surface of the clamping plate 422. The bolt also passes through the connecting member 421, and a fastener such as a nut is attached to one end of the bolt passing through the connecting member 421. And the compression spring 423 is sleeved outside the bolt. While the compression spring 423 may be a cylindrical helical compression spring or an elastic sleeve or a belleville spring, when the clamping plate 422 moves toward the connecting member 421, the length of the bolt extending out of the connecting member 421 increases, and the compression spring 423 is compressed.

By arranging the compression spring 423 between the clamping plate 422 and the connecting piece 421, the compression spring 423 can be given a pretightening force when the clamping plate 422 and the second rotating mechanism 300 clamp the workpiece, even if clamping driving is realized by adopting an electric mode, the acting force of the clamping plate 422 on the workpiece can be still maintained after the clamping movement is in place, and the clamping reliability is improved. Or, it may be further realized that the telescopic driving piece 411 moves the clamping action assembly 420 to a preset position, and when the workpiece is placed in each time, the clamping plate 422 is jacked up by using the volume and thickness of the workpiece, so that the compression spring 423 compresses, and therefore, the compression acting force of the clamping plate 422 on the workpiece is always reliable after the workpiece is installed in place.

As shown in fig. 5 and 6, optionally, the second rotating mechanism 300 further includes a supporting frame 320 and a second rotating shaft 340, the supporting frame 320 is a box body with an opening on one side, the turntable 310 is disposed on the opening side of the box body, and the second rotating mechanism 300 is connected with the first rotating mechanism 200 through the second rotating shaft 340.

In this embodiment, the supporting frame 320 is a cylindrical box with a circular opening, the turntable 310 is disposed on the top surface of the cylindrical box, and the turntable 310 may be fixedly connected with the supporting frame 320, for example, by a screw. The second rotation shaft 340 is located in the middle of the support frame 320, where the middle refers to that the second rotation shaft 340 is located in a plane perpendicular to a certain diameter of the cylindrical box body. Moreover, in the present embodiment, the second rotating shaft 340 is also located at a substantially middle position of the cylindrical case at the cylindrical height.

In another implementation, the case may have a rectangular hexagonal shape, and the support 320 may have a door shape, and the second shaft 340 is rotatably connected to two legs of the door shape.

Through setting up support frame 320 for the box body of one side open-ended, can utilize the weight of support frame 320 in order to guarantee that second slewing mechanism 300, fixture 400 and the center of mass of the work piece that is held are comparatively close with the axis of second pivot 340 to the degree of difficulty of rotating second slewing mechanism 300 has been reduced, operating efficiency has been improved.

As shown in fig. 5 and 7, optionally, the second rotating mechanism 300 further includes a baffle 330, where the baffle 330 is disposed on the turntable 310 and located in the extending direction of the limiting slot 311.

Wherein, most of the limiting groove 311 is located at one end of the center of the turntable 310 in the length direction, and the baffle 330 is located at the other end. Specifically, in this embodiment, the baffle 330 may be a flat plate, and is fixedly connected to the turntable 310, for example, by welding.

By providing the baffle 330, when the second rotating mechanism 300 rotates to a vertical or inclined state, a part of the weight of the workpiece can be borne by the baffle 330, and the workpiece can be positioned by the baffle 330 and clamped by the clamping mechanism 400 to fix the workpiece.

As shown in fig. 5, alternatively, the first rotating mechanism 200 includes a first rotating shaft 220 and a connecting frame 210, the connecting frame 210 is fixedly connected with a second rotating shaft 340, and the first rotating shaft 220 is rotatably connected with the base 100.

Wherein the first rotational axis 501 coincides with the axis of the first shaft 220.

By providing the first rotation shaft 220, it is possible to conveniently realize the rotational connection of the connection frame 210 of the first rotation mechanism 200 with the base 100, and to realize the connection stability of the first rotation mechanism 200.

As shown in fig. 5, alternatively, the link 210 extends along a semicircular arc, the second rotation axis 502 is located at an end of the semicircular arc, and the first rotation axis 501 intersects with a middle of the semicircular arc.

Specifically, in the present embodiment, the connection frame 210 is substantially semi-circular, and the turntable 310 and the support frame 320 together form a cylindrical box or a pie-shaped structure.

The first rotation axis 501 intersects with the middle of the semicircular arc, so that the first rotation axis 220 is located at the approximately middle of the connecting frame 210 in the length direction, so as to support the connecting frame 210 and the second rotation mechanism 300 and the clamping mechanism 400 thereon, and the center of gravity of the connecting frame and the second rotation mechanism is located in the first rotation axis 220, thereby reducing the possibility of overturning the positioning tool and improving the stability of the positioning tool in use.

The action principle of the embodiment is as follows:

First, a male screw coupling 421 such as a screw or a bolt is passed through the positioning hole 110 on the base 100, and the base 100 is fixed at a processing station of the corresponding apparatus.

The workpiece to be processed is placed on the turntable 310, one end of the workpiece is abutted against the baffle 330, the telescopic driving piece 411 moves along the limiting groove 311, and the sliding block 431 is matched with the limiting groove 311 and driven by the linear driving piece 432, so that when the linear driving piece 432 stops moving, namely, the clamping mechanism 400 is fixed relative to the position of the limiting groove 311.

Then, the overall length of the telescopic driving piece 411 is adjusted according to the height of the workpiece, so that the workpiece is positioned between the connecting piece 421 and the turntable 310, and the workpiece is compressed by the compression spring 423, in other words, the clamping plate 422 also presses the workpiece on the turntable 310 under the action of the compression spring 423, thereby ensuring the stability of the workpiece. In the workpiece processing process, the connecting frame 210 can be rotated along the first rotating shaft 220, and the supporting frame 320 can be rotated along the second rotating shaft 340, so that the workpiece can be adjusted to various angles, different positions of the workpiece can be processed conveniently, and the processing efficiency is improved.

Embodiment two:

the second embodiment also provides a processing device, which comprises the positioning tool.

In addition to including a positioning tool, the processing apparatus may include, for example, a welding apparatus, and after the workpiece is positioned by the positioning tool, the workpiece may be welded. Of course, the positioning tool can be used in the assembly operation process, and the machining efficiency can be improved.

By arranging the positioning tool in the processing equipment, the processing equipment has all the advantages of the positioning tool, and therefore the positioning tool is not described in detail.

Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.

Finally, it is further noted that relational terms such as first and second, and the like are 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. Moreover, 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 one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

In the above embodiments, descriptions of orientations such as "up", "down", and the like are shown based on the drawings.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. 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 utility model.

Thus, the present utility model 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.

Claims (10)

1. Positioning tool, its characterized in that includes:

a base (100) for fixing at a processing station;

a first rotation mechanism (200) which is rotatably arranged relative to the base (100) along a first rotation axis (501);

A second rotation mechanism (300) rotatably disposed relative to the first rotation mechanism (200) along a second rotation axis (502), the first rotation axis (501) being perpendicular to the second rotation axis (502), and

And a clamping mechanism (400) arranged on the second rotation axis (502) and configured to clamp a workpiece together with the second rotation mechanism (300).

2. The positioning tool according to claim 1, wherein the second rotating mechanism (300) is provided with a moving guide rail, the clamping mechanism (400) comprises a clamping moving assembly (430), a clamping driving assembly and a clamping action assembly (420), the clamping moving assembly (430) is matched with the moving guide rail, the clamping moving assembly (430) is configured to move on the moving guide rail, the clamping driving assembly is mounted on the clamping moving assembly (430), and the clamping driving assembly is used for driving the clamping action assembly (420) to move towards the second rotating mechanism (300) and move away from the second rotating mechanism (300).

3. The positioning tool according to claim 2, wherein the second rotating mechanism (300) comprises a turntable (310), the turntable (310) is provided with a limiting groove (311), the clamping driving assembly comprises a telescopic driving piece (411), the telescopic driving piece (411) is fixedly arranged at the power output end of the clamping moving assembly (430), the clamping moving assembly (430) is positioned at a first side of the turntable (310), the clamping acting assembly (420) is positioned at a second side of the turntable (310), and the first side and the second side are opposite sides of the turntable (310).

4. A positioning tool according to claim 3, wherein the clamping moving assembly (430) comprises a slider (431) and a linear driving member (432), the linear driving member (432) is connected to the slider (431), and the slider (431) is slidably connected to the limiting groove (311).

5. A positioning tool according to claim 3, wherein the clamping action assembly (420) comprises a connecting piece (421), a clamping plate (422) and a compression spring (423), the connecting piece (421) is connected with the power output end of the telescopic driving piece (411), and the compression spring (423) is arranged between the clamping plate (422) and the connecting piece (421).

6. The positioning tool according to claim 3, wherein the second rotating mechanism (300) further comprises a supporting frame (320) and a second rotating shaft (340), the supporting frame (320) is a box body with an opening on one side, the rotary table (310) is arranged on the opening side of the box body, and the second rotating mechanism (300) is connected with the first rotating mechanism (200) through the second rotating shaft (340).

7. The positioning tool according to claim 6, wherein the second rotating mechanism (300) further comprises a baffle (330), and the baffle (330) is disposed on the turntable (310) and located in the extending direction of the limiting groove (311).

8. The positioning tool according to any one of claims 1-7, wherein the first rotation mechanism (200) comprises a first rotation shaft (220) and a connection frame (210), the connection frame (210) is fixedly connected with a second rotation shaft (340), and the first rotation shaft (220) is rotatably connected with the base (100).

9. The positioning tool according to claim 8, wherein the connecting frame (210) extends along a semicircular arc, the second rotation axis (502) is located at an end of the semicircular arc, and the first rotation axis (501) intersects with a middle of the semicircular arc.

10. A machining apparatus, characterized in that it comprises a positioning fixture according to any one of claims 1-9.