CN220388725U - Positioning device - Google Patents

Abstract

A positioning device, comprising: the bearing assembly is provided with a positioning groove and a containing groove, and the positioning groove contains a workpiece; the positioning assembly comprises a first positioning piece and a second positioning piece which are respectively connected with the bearing assembly; a pressing assembly comprising: the first pressing piece and the second pressing piece are arranged in the accommodating groove; the two ends of the elastic piece are respectively elastically propped against the first propping piece and the second propping piece; the pressing driving piece movably penetrates into the accommodating groove and penetrates through the first pressing piece and the second pressing piece, and is connected with the first pressing piece and is abutted to the second pressing piece through the pressing piece. The pressing driving piece drives the first pressing piece to press the first positioning piece to move towards the groove wall of the positioning groove, and the elastic piece drives the second pressing piece to synchronously press the second positioning piece to move towards the groove wall of the positioning groove, the first positioning piece and the second positioning piece are respectively abutted to different positions of the same side wall of the workpiece, surface contact is formed between the positioning assembly and the workpiece, stable positioning of the workpiece is achieved, and positioning accuracy is improved.

Description

Positioning device

Technical Field

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

Background

The rotating shaft of the four-axis mechanism in the CNC machine table is usually provided with a positioning mechanism, the positioning mechanism clamps and positions the workpiece, and the positioned workpiece is convenient to precisely process by a cutter.

The extrusion block is driven by the linear air cylinder to extrude the elastic positioning plate in the positioning mechanism, so that the positioning plate and the groove wall of the positioning groove clamp and position the two opposite sides of the workpiece. However, since the single positioning plate forms line contact with the workpiece when positioning the workpiece to the groove wall of the positioning groove, the workpiece is easy to shake in the processing or transferring process, and the positioning precision is reduced.

Disclosure of Invention

In view of the above, it is necessary to provide a positioning device to improve positioning accuracy.

The embodiment of the application provides a positioning device, which comprises: the bearing assembly is provided with a positioning groove and a containing groove, the positioning groove penetrates through two opposite sides of the bearing assembly, the positioning groove is used for containing a workpiece, and the containing groove is arranged on one side of the bearing assembly and is communicated with the positioning groove; the positioning assembly comprises a first positioning piece and a second positioning piece, and the first positioning piece and the second positioning piece are arranged at intervals along the penetrating direction of the positioning groove and are respectively connected with the bearing assembly; a pressing assembly comprising: the first pressing piece and the second pressing piece are arranged in the accommodating groove along the penetrating direction of the positioning groove, and are respectively used for pressing the first positioning piece and the second positioning piece so as to enable the first positioning piece and the second positioning piece to move towards the groove wall of the positioning groove and be matched with the groove wall of the positioning groove to position the workpiece; the two ends of the elastic piece are respectively elastically propped against the first propping piece and the second propping piece; the pressing driving piece movably penetrates into the accommodating groove and penetrates through the first pressing piece and the second pressing piece, is connected with the first pressing piece and is abutted to the second pressing piece through the pressing piece, and is used for driving the first pressing piece to move towards the bottom of the accommodating groove and driving the second pressing piece to synchronously move through the elastic piece.

According to the positioning device, the first pressing piece is driven to press the first positioning piece to move towards the groove wall of the positioning groove by the pressing driving piece, the second pressing piece is driven to synchronously press the second positioning piece to move towards the groove wall of the positioning groove by the elastic piece, the first positioning piece and the second positioning piece can be respectively abutted to different positions of the same side wall of the workpiece, so that surface contact is formed between the positioning assembly and the workpiece, and accordingly the first positioning piece and the second positioning piece are matched with the groove wall of the positioning groove to stably position the two opposite sides of the workpiece, and positioning accuracy is achieved.

In some embodiments, the first positioning member comprises: the first fixing part is arranged at the bottom of the accommodating groove and is connected with the bearing assembly; the first supporting part is arranged on the first fixing part along the penetrating direction of the positioning groove; the first positioning part is arranged along the direction of the containing groove pointing to the positioning groove and is connected with the first supporting part, and the first positioning part is used for positioning the workpiece to the groove wall of the positioning groove under the supporting pressure of the first supporting part.

In some embodiments, the first support portion is provided with a clearance groove, and the second positioning member includes: the second fixing part is arranged on one side of the first fixing part, which is away from the bottom of the accommodating groove, and is connected with the first fixing part; the second supporting part is arranged in parallel with the first supporting part and is connected with the second fixing part; the second positioning part is movably arranged in the avoidance groove in a penetrating mode and is parallel to the first positioning part, the second positioning part is connected with the second supporting part, and the second positioning part is used for positioning the workpiece to the groove wall of the positioning groove under the supporting and pressing action of the second supporting part.

In some embodiments, a first inclined plane and a second inclined plane are respectively arranged on one side of the first positioning piece and one side of the second positioning piece, which are away from the groove wall of the positioning groove; the first pressing piece and the second pressing piece are respectively provided with a first adapting surface and a second adapting surface which are matched with the first inclined surface and the second inclined surface, the first pressing piece is matched with the first inclined surface through the first adapting surface to press the first positioning piece, and the second pressing piece is matched with the second inclined surface through the second adapting surface to press the second positioning piece.

In some embodiments, a receiving groove and a receiving groove are respectively formed on one side of the first pressing piece and one side of the second pressing piece, which face the elastic piece, and the receiving groove are used for receiving opposite ends of the elastic piece to limit the elastic piece.

In some embodiments, the number of the elastic members is two, and the two elastic members are arranged in parallel and are respectively arranged at two opposite sides of the pressing driving member.

In some embodiments, the positioning device further comprises: the rotary driving piece is arranged on one side of the bearing assembly and connected with the bearing assembly, and is used for driving the clamped workpiece to rotate so as to adjust the orientation of the workpiece.

In some embodiments, the number of the positioning slots, the accommodating slots, the positioning assemblies and the pressing assemblies is multiple, the multiple groups of the positioning slots are spaced and sequentially arranged on the bearing assembly, the multiple groups of the accommodating slots are respectively communicated with the corresponding positioning slots, the multiple groups of the positioning assemblies and the multiple groups of the pressing assemblies are respectively arranged in the corresponding accommodating slots, and the multiple groups of the positioning assemblies and the multiple groups of the pressing assemblies are matched to respectively position the multiple workpieces in the multiple groups of the positioning slots.

In some embodiments, the positioning device further comprises: the alignment assembly is arranged below the bearing assembly and corresponds to the bearing assembly, and the alignment assembly and the positioning assembly are matched to align a plurality of workpieces.

In some embodiments, the alignment assembly comprises: the bearing assembly is positioned between the two guide pieces, and one side of each guide piece facing the other guide piece is provided with a guide groove; the two opposite ends of the alignment piece are respectively arranged in the two guide grooves in a sliding way; and the alignment driving piece is connected with the alignment piece and used for driving the alignment piece to move below the bearing assembly so as to align a plurality of workpieces.

Drawings

Fig. 1 is a schematic perspective view of a positioning device and a workpiece adapted to the positioning device according to an embodiment of the present application.

Fig. 2 is a schematic perspective view of a bearing assembly, a positioning assembly, a pressing assembly and a workpiece adapted by the positioning device in the positioning device shown in fig. 1.

Fig. 3 is a cross-sectional view of the workpiece along direction iii-iii, as shown in fig. 2, of the carrier assembly, positioning assembly, and abutment assembly and positioning device.

Fig. 4 is an exploded view of the positioning assembly and the pressing assembly shown in fig. 2.

Description of the main reference signs

Positioning device 100

Load bearing assembly 10

Positioning groove 11

Storage groove 12

Positioning assembly 20

First positioning member 21

First fixing portion 211

First support portion 212

Avoidance groove 2121

First positioning portion 213

First inclined plane 214

Second positioning piece 22

Second fixing portion 221

Second support portion 222

Second positioning portion 223

Second inclined plane 224

Pressing assembly 30

First pressing member 31

First mating surface 311

Storage groove 312

Second pressing member 32

Second adapting surface 321

Receiving groove 322

Elastic member 33

Pressing the driving member 34

Abutment 35

Rotary driving member 40

Alignment assembly 50

Guide 51

Guide groove 511

Alignment bit 512

Alignment member 52

Alignment drive 53

Workpiece 200

Detailed Description

The objects, features and advantages of the present application will be more clearly understood from the following detailed description of the present application taken in conjunction with the accompanying drawings and detailed description. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, the described embodiments are merely some, rather than all, of the embodiments of the present application.

Embodiments of the present application are further described below with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of a positioning device 100 is provided, which includes a carrying assembly 10, a positioning assembly 20 and a pressing assembly 30, wherein the positioning device 100 is used for positioning a workpiece 200. Wherein the workpiece 200 may be a strip-shaped plate.

Referring to fig. 2 and 3, the carrying assembly 10 is provided with a positioning slot 11 and a receiving slot 12, the positioning slot 11 penetrates through two opposite sides of the carrying assembly 10, the positioning slot 11 is used for receiving the workpiece 200, and the receiving slot 12 is formed on one side of the carrying assembly 10 and is communicated with the positioning slot 11. The positioning assembly 20 comprises a first positioning piece 21 and a second positioning piece 22, and the first positioning piece 21 and the second positioning piece 22 are arranged at intervals along the penetrating direction of the positioning groove 11 and are respectively connected with the bearing assembly 10. The pressing assembly 30 includes a first pressing member 31, a second pressing member 32, an elastic member 33, a pressing driving member 34, and a pressing member 35. The first pressing member 31 and the second pressing member 32 are disposed in the accommodating groove 12 along the penetrating direction of the positioning groove 11, and the first pressing member 31 and the second pressing member 32 are respectively used for pressing the first positioning member 21 and the second positioning member 22, so that the first positioning member 21 and the second positioning member 22 move towards the groove wall of the positioning groove 11 and are matched with the groove wall of the positioning groove 11 to position the workpiece 200. Both ends of the elastic member 33 elastically abut against the first abutting member 31 and the second abutting member 32, respectively. The pressing driving piece 34 movably penetrates into the accommodating groove 12 and penetrates through the first pressing piece 31 and the second pressing piece 32, the pressing driving piece 34 is connected with the first pressing piece 31 and is abutted to the second pressing piece 32 through the abutting piece 35, and the pressing driving piece 34 is used for driving the first pressing piece 31 to move towards the bottom of the accommodating groove 12 and driving the second pressing piece 32 to synchronously move through the elastic piece 33. In this embodiment, the pressing driving member 34 is a linear cylinder, the output end of the cylinder movably penetrates into the accommodating groove 12 and is disposed through the first pressing member 31 and the second pressing member 32, and the end of the output end is connected to the first pressing member 31, and the elastic member 33 may be a spring.

In the positioning device 100, the pressing driving member 34 drives the first pressing member 31 to press the first positioning member 21 to move towards the groove wall of the positioning groove 11, and drives the second pressing member 32 to synchronously press the second positioning member 22 to move towards the groove wall of the positioning groove 11 through the elastic member 33, so that the first positioning member 21 and the second positioning member 22 can be respectively abutted against different positions on the same side wall of the workpiece 200, and surface contact is formed between the positioning assembly 20 and the workpiece 200, so that the first positioning member 21 and the second positioning member 22 are matched with the groove wall of the positioning groove 11 to stably position opposite sides of the workpiece 200, and positioning accuracy is further improved.

Referring to fig. 3 and 4, in some embodiments, the first positioning member 21 includes a first fixing portion 211, a first supporting portion 212, and a first positioning portion 213. The first fixing portion 211 is disposed at a bottom of the accommodating groove 12 and connected to the carrier assembly 10. The first support portion 212 is disposed on the first fixing portion 211 along the penetrating direction of the positioning groove 11. The first positioning portion 213 is disposed along the direction of the receiving groove 12 pointing to the positioning groove 11 and connected to the first supporting portion 212, and the first positioning portion 213 is configured to position the workpiece 200 to a groove wall of the positioning groove 11 under the pressing force of the first pressing member 31.

In this way, by providing the first positioning portion 213 along the direction in which the accommodating groove 12 is directed to the positioning groove 11, the first positioning portion 213 can be stably moved toward the groove wall of the positioning groove 11 under the pressing force of the first pressing member 31, and misalignment between the first positioning portion 213 and the workpiece 200 due to the deviation in the moving direction of the first pressing member 31 can be avoided, so that the first positioning portion 213 and the groove wall of the positioning groove 11 can stably clamp and fix the workpiece 200, and positioning accuracy can be improved.

In some embodiments, the first support 212 is provided with a clearance groove 2121. The second positioning member 22 includes a second fixing portion 221, a second supporting portion 222, and a second positioning portion 223. The second fixing portion 221 is disposed on a side of the first fixing portion 211 away from the bottom of the accommodating groove 12 and is connected to the first fixing portion 211. The second support portion 222 is disposed parallel to the first support portion 212 and connected to the second fixing portion 221. The second positioning portion 223 is movably disposed through the avoiding groove 2121 and parallel to the first positioning portion 213, the second positioning portion 223 is connected to the second supporting portion 222, and the second positioning portion 223 is configured to position the workpiece 200 to a groove wall of the positioning groove 11 under the pressing of the second pressing member 32.

In this way, by providing the second positioning portion 223 movably penetrating the avoiding groove 2121, the second positioning portion 223 which moves the avoiding groove 2121 toward the positioning groove 11 can be avoided, and interference between the second positioning portion 223 and the first supporting portion 212 can be prevented. In addition, by arranging the second positioning portion 223 in parallel with the first positioning portion 213, the second positioning portion 223 can be moved synchronously with the first positioning portion 213 in the same direction under the pressing force of the second pressing member 32, so that the first positioning portion 213 and the second positioning portion 223 can be ensured to be pressed synchronously against different positions on the same side wall of the workpiece 200, and the first positioning portion 213 and the second positioning portion 223 can be matched to stably press the workpiece 200 against the groove wall of the positioning groove 11, thereby further improving the positioning accuracy.

In this embodiment, the first positioning member 21 and the second positioning member 22 are both elastic bodies, and the elastic bodies may be made of spring steel, so that when the first pressing member 31 and the second pressing member 32 cancel pressing the corresponding positioning members, the first positioning member 21 and the second positioning member 22 return to the initial state by using the elastic characteristics of the spring steel, so that the positioning assembly 20 can repeatedly perform positioning operations.

In some implementations, the sides of the first positioning member 21 and the second positioning member 22 facing away from the groove wall of the positioning groove 11 are provided with a first inclined surface 214 and a second inclined surface 224, respectively. The first pressing member 31 and the second pressing member 32 are respectively provided with a first adapting surface 311 and a second adapting surface 321 which are adapted to the first inclined surface 214 and the second inclined surface 224, the first pressing member 31 is matched with the first inclined surface 214 through the first adapting surface 311 to press the first positioning member 21, and the second pressing member 32 is matched with the second inclined surface 224 through the second adapting surface 321 to press the second positioning member 22.

In this way, by providing the first adapting surface 311 and the second adapting surface 321 that are adapted to the first inclined surface 214 and the second inclined surface 224, the first pressing member 31 and the second pressing member 32 can be made to stably press against the corresponding inclined surfaces through the first adapting surface 311 and the second adapting surface 321, respectively, so that the first positioning member 21 and the second positioning member 22 can be made to stably move toward the groove wall of the positioning groove 11, and positioning stability is improved.

Referring to fig. 3, in some embodiments, a side of the first pressing member 31 and the second pressing member 32 facing the elastic member 33 are respectively provided with a receiving groove 312 and a receiving groove 322, and the receiving groove 312 and the receiving groove 322 are used for receiving opposite ends of the elastic member 33 to limit the elastic member 33.

In this way, the accommodating grooves 312 and 322 are provided to accommodate the opposite ends of the elastic member 33, so that the elastic member 33 can be limited, so that the elastic member 33 is always compressed or restored along the direction of the first pressing member 31 pointing to the second pressing member 32, and the elastic member 33 can stably provide elastic force.

Referring to fig. 4, in some embodiments, the number of the elastic members 33 is two, and the two elastic members 33 are disposed in parallel and disposed on opposite sides of the pressing driving member 34.

In this way, when the first pressing member 31 drives the second pressing member 32 to move synchronously through the two elastic members 33 disposed in parallel, the driving force applied to the second pressing member 32 can be distributed uniformly, so as to prevent the second pressing member 32 from deflecting or swinging due to the single driving force, so that the second pressing member 32 can stably press the second positioning member 22 to position the workpiece 200, and the stability of the pressing assembly 30 is improved.

Referring to fig. 1, in some embodiments, the positioning device 100 further includes a rotation driving member 40, where the rotation driving member 40 is disposed on one side of the carrier assembly 10 and connected to the carrier assembly 10, and the rotation driving member 40 is used for driving the clamped workpiece 200 to rotate so as to adjust the orientation of the workpiece 200. In the present embodiment, the rotary driving member 40 may be a rotary motor, a machine spindle, or the like.

In this way, through setting up rotary driving piece 40 and being connected with bearing assembly 10, can make rotary driving piece 40 drive bear assembly 10 drive the work piece 200 rotation that is clamped to adjust the orientation of the work piece 200 that is clamped, be convenient for external processing equipment carry out accurate processing to the work piece 200 after the adjustment.

Referring to fig. 3, in some embodiments, the number of the positioning slots 11, the accommodating slots 12, the positioning assemblies 20 and the pressing assemblies 30 is multiple, the multiple sets of positioning slots 11 are spaced apart and sequentially disposed on the carrying assembly 10, the multiple sets of accommodating slots 12 are respectively communicated with the corresponding positioning slots 11, the multiple sets of positioning assemblies 20 and the multiple sets of pressing assemblies 30 are respectively disposed in the corresponding accommodating slots 12, and the multiple sets of positioning assemblies 20 and the multiple sets of pressing assemblies 30 are matched to respectively position the multiple workpieces 200 in the multiple sets of positioning slots 11, so that the positioning device 100 can simultaneously position the multiple workpieces 200 without positioning the single workpiece 200 one by one, thereby improving the positioning efficiency.

In the present embodiment, referring to fig. 3, two opposite groove walls of each receiving groove 12 are respectively communicated with two positioning grooves 11. Referring to fig. 4, the number of the supporting portions and the positioning portions in the first positioning member 21 and the second positioning member 22 is two, and the supporting portions and the positioning portions in the first positioning member 21 and the second positioning member 22 are arranged in the same manner, and the first positioning member 21 is described as an example. The two first supporting portions 212 are disposed at the first fixing portion 211 along the direction in which one of the positioning slots 11 points to the other positioning slot 11 at intervals, and the two first positioning portions 213 are respectively connected with the two first supporting portions 212 and respectively correspond to the two positioning slots 11, so that the two second supporting portions 222 and the two second positioning portions 223 of the second positioning member 22 are disposed in the same manner, which is not described herein.

In this way, by setting the number of the supporting parts and the positioning parts in the first positioning part 21 and the second positioning part 22 to be two, the first pressing part 31 can press the two first positioning parts 213 to move towards the two positioning grooves 11 respectively, and the second pressing part 32 can press the two second positioning parts 223 to move towards the two positioning grooves 11 respectively, so that the two workpieces 200 are simultaneously positioned by matching the group of pressing components 30 and the group of positioning components 20, the positioning efficiency is improved, the mechanical structure of the positioning device 100 is simplified, and the production cost is reduced.

Referring to fig. 1, in some embodiments, the positioning apparatus 100 further includes an alignment assembly 50, where the alignment assembly 50 is disposed below the carrier assembly 10 and corresponds to the carrier assembly 10, and the alignment assembly 50 and the positioning assembly 20 cooperate to align the plurality of workpieces 200.

Firstly, the rotary driving piece 40 drives the bearing assembly 10 to drive the plurality of clamped workpieces 200 to rotate, so that the plurality of workpieces 200 correspond to the alignment assembly 50 positioned below the bearing assembly 10; next, the positioning assembly 20 releases the clamped workpieces 200 under the drive of the pressing assembly 30, so that the alignment assembly 50 receives and aligns the plurality of workpieces 200; finally, the positioning assembly 20 clamps the aligned workpieces 200 under the driving of the pressing assembly 30. In this way, the alignment assembly 50 is matched with the positioning assembly 20 and the pressing assembly 30 to align the plurality of workpieces 200, so that the upper surfaces of the aligned workpieces 200 are in the same plane, and the external processing equipment can accurately process the workpieces 200.

In some embodiments, the alignment assembly 50 includes two guides 51, an alignment member 52, and an alignment drive member 53. The two guide members 51 are opposite to each other and spaced apart, and the carrier assembly 10 is located between the two guide members 51, and a guide groove 511 is provided at a side of each guide member 51 facing the other guide member 51. Opposite ends of the alignment member 52 are slidably disposed in the two guide grooves 511, respectively. An alignment drive 53 is coupled to the alignment member 52 for driving the alignment member 52 to move under the carrier assembly 10 to align the plurality of workpieces 200. In this embodiment, the guide member 51 is provided with an alignment position 512, and the alignment position 512 is located below the carrier assembly 10, and the alignment driving member 53 may be a cylinder.

In this way, by arranging the two opposite ends of the alignment piece 52 to be respectively slidably arranged in the two guide grooves 511, the two guide pieces 51 can guide the alignment piece 52 through the guide grooves 511, so that the alignment piece 52 always moves along the extending direction of the guide grooves 511, and the phenomenon that a plurality of workpieces 200 cannot be abutted against the alignment piece 52 due to dislocation between the alignment piece 52 and the bearing assembly 10 is avoided, and the alignment precision of the alignment assembly 50 is improved. In addition, by providing the alignment driving member 53 and connecting the alignment member 52, the alignment driving member 53 can drive the alignment member 52 to move to the alignment position 512 to accurately align the plurality of workpieces 200 when performing the alignment operation, or drive the alignment member 52 to move out of the alignment position 512 when the carrier assembly 10 and the workpieces 200 held by the carrier assembly rotate, so as to avoid interference between the workpieces 200 and the alignment member 52 when rotating.

The working process of the positioning device 100 is as follows:

firstly, a plurality of workpieces 200 are respectively placed in corresponding positioning grooves 11, and a pressing driving piece 34 drives a first pressing piece 31 to move towards the bottom of a containing groove 12 and drives a second pressing piece 32 to synchronously move with the first pressing piece 31 through an elastic piece 33;

then, the first positioning piece 21 and the second positioning piece 22 move towards the groove wall of the positioning groove 11 under the supporting pressure of the first supporting piece 31 and the second supporting piece 32 respectively, and the first positioning piece 21 and the second positioning piece 22 respectively abut against different positions of the same side wall of the workpiece 200 of the positioning groove 11, so that surface contact is formed between the positioning assembly 20 and the workpiece 200, and the first positioning piece 21 and the second positioning piece 22 are matched with the groove wall of the positioning groove 11 to stably position the opposite sides of the workpiece 200, so that the positioning precision is improved;

then, the rotary driving piece 40 drives the bearing assembly 10 to drive the clamped workpieces 200 to rotate, the alignment driving piece 53 drives the alignment piece 52 to move below the bearing assembly 10, and the first abutting piece 31 and the second abutting piece 32 cancel abutting of the first positioning piece 21 and the second positioning piece 22 respectively, so that the first positioning piece 21 and the second positioning piece 22 release the clamped workpieces 200, and the alignment piece 52 is abutted with the released workpieces 200 and aligns the workpieces 200;

finally, the first pressing member 31 moves towards the bottom of the accommodating groove 12 under the driving of the pressing driving member 34, and drives the second pressing member 32 to synchronously move towards the bottom of the accommodating groove 12 through the elastic member 33, so that the first positioning member 21 and the second positioning member 22 respectively move towards the groove wall of the positioning groove 11 under the pressing of the first pressing member 31 and the second pressing member 32, so as to position the aligned workpiece 200 to the groove wall of the positioning groove 11, and then the rotary driving member 40 drives the bearing assembly 10 to rotate by a preset angle, so that the external processing equipment can accurately process the aligned workpiece 200.

Finally, it should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.

Claims (10)

1. A positioning device, comprising:

the bearing assembly is provided with a positioning groove and a containing groove, the positioning groove penetrates through two opposite sides of the bearing assembly, the positioning groove is used for containing a workpiece, and the containing groove is arranged on one side of the bearing assembly and is communicated with the positioning groove;

the positioning assembly comprises a first positioning piece and a second positioning piece, and the first positioning piece and the second positioning piece are arranged at intervals along the penetrating direction of the positioning groove and are respectively connected with the bearing assembly;

a pressing assembly comprising:

the first pressing piece and the second pressing piece are arranged in the accommodating groove along the penetrating direction of the positioning groove, and are respectively used for pressing the first positioning piece and the second positioning piece so as to enable the first positioning piece and the second positioning piece to move towards the groove wall of the positioning groove and be matched with the groove wall of the positioning groove to position the workpiece;

the two ends of the elastic piece are respectively elastically propped against the first propping piece and the second propping piece;

the pressing driving piece movably penetrates into the accommodating groove and penetrates through the first pressing piece and the second pressing piece, is connected with the first pressing piece and is abutted to the second pressing piece through the pressing piece, and is used for driving the first pressing piece to move towards the bottom of the accommodating groove and driving the second pressing piece to synchronously move through the elastic piece.

2. The positioning device of claim 1 wherein said first positioning member comprises:

the first fixing part is arranged at the bottom of the accommodating groove and is connected with the bearing assembly;

the first supporting part is arranged on the first fixing part along the penetrating direction of the positioning groove;

the first positioning part is arranged along the direction of the containing groove pointing to the positioning groove and is connected with the first supporting part, and the first positioning part is used for positioning the workpiece to the groove wall of the positioning groove under the supporting pressure of the first supporting part.

3. The positioning device of claim 2, wherein the first support portion is provided with a clearance groove, and the second positioning member includes:

the second fixing part is arranged on one side of the first fixing part, which is away from the bottom of the accommodating groove, and is connected with the first fixing part;

the second supporting part is arranged in parallel with the first supporting part and is connected with the second fixing part;

the second positioning part is movably arranged in the avoidance groove in a penetrating mode and is parallel to the first positioning part, the second positioning part is connected with the second supporting part, and the second positioning part is used for positioning the workpiece to the groove wall of the positioning groove under the supporting and pressing action of the second supporting part.

4. The positioning device of claim 1 wherein,

a first inclined plane and a second inclined plane are respectively arranged on one side of the first positioning piece and one side of the second positioning piece, which are away from the groove wall of the positioning groove;

the first pressing piece and the second pressing piece are respectively provided with a first adapting surface and a second adapting surface which are matched with the first inclined surface and the second inclined surface, the first pressing piece is matched with the first inclined surface through the first adapting surface to press the first positioning piece, and the second pressing piece is matched with the second inclined surface through the second adapting surface to press the second positioning piece.

5. The positioning device of claim 1 wherein,

the first abutting piece and the second abutting piece are provided with a storage groove and a containing groove respectively towards one side of the elastic piece, and the storage groove and the containing groove are used for storing opposite ends of the elastic piece so as to limit the elastic piece.

6. The positioning device of claim 1 wherein,

the number of the elastic pieces is two, and the two elastic pieces are arranged in parallel and are respectively arranged on two opposite sides of the pressing driving piece.

7. The positioning device of claim 1, wherein the positioning device further comprises:

the rotary driving piece is arranged on one side of the bearing assembly and connected with the bearing assembly, and is used for driving the clamped workpiece to rotate so as to adjust the orientation of the workpiece.

8. The positioning device of claim 1 wherein,

the positioning grooves, the accommodating grooves, the positioning assemblies and the pressing assemblies are multiple groups, the positioning grooves are arranged at intervals and are sequentially arranged on the bearing assemblies, the accommodating grooves are respectively communicated with the corresponding positioning grooves, the positioning assemblies and the pressing assemblies are respectively arranged in the corresponding accommodating grooves, and the positioning assemblies and the pressing assemblies are matched to be used for respectively positioning a plurality of workpieces in the positioning grooves.

9. The positioning device of claim 8, wherein the positioning device further comprises:

the alignment assembly is arranged below the bearing assembly and corresponds to the bearing assembly, and the alignment assembly and the positioning assembly are matched to align a plurality of workpieces.

10. The positioning device of claim 9 wherein said alignment assembly comprises:

the bearing assembly is positioned between the two guide pieces, and one side of each guide piece facing the other guide piece is provided with a guide groove;

the two opposite ends of the alignment piece are respectively arranged in the two guide grooves in a sliding way;

and the alignment driving piece is connected with the alignment piece and used for driving the alignment piece to move below the bearing assembly so as to align a plurality of workpieces.