Automatic positioning mechanism for glasses frame welding

Abstract

The utility model discloses an automatic positioning mechanism for glasses frame welding, and belongs to the field of glasses frame production equipment. Comprising a welding positioning rotary table, and more than two spectacle ring positioning structures for positioning spectacle rings of a spectacle frame are arranged on the welding positioning rotary table; the middle beam positioning structure is used for positioning a middle beam of the glasses frame; the number of the welding positioning rotary tables is two, and the two welding positioning rotary tables are arranged on the two sides of the middle beam positioning structure correspondingly. Compared with the prior art, the automatic positioning mechanism for glasses frame welding has the beneficial effects that the plurality of glasses ring positioning structures are arranged on the rotatable welding positioning turntable, so that during welding, the rapid and automatic position change of the plurality of glasses rings can be realized by rotating the welding positioning turntable; quick and automatic welding of the glasses frame can be completed in cooperation with welding equipment; and meanwhile, during welding, the lens ring and the middle beam can be positioned in the up-down and left-right directions, and the advantage of stable positioning is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of eyeglass frame production equipment, and particularly relates to an automatic positioning mechanism for eyeglass frame welding. Background Art

[0002] Eyeglass frames are usually composed of main parts such as the rim, the middle beam, the nose pad, the stump and the temples. When producing eyeglass frames, the rim and the middle beam need to be welded together, and the clamps of the rims usually also need to be welded. When welding eyeglass frames, a support and positioning device for eyeglass frame welding is required. In the automated operation of eyeglass frame welding, the support and positioning device for eyeglass frame welding cooperates with the welding device to realize the welding operation of the eyeglass frame.

[0003] The existing support and positioning device for welding the eyeglass frame is a simple support platform, which can only support the eyeglass frame, but cannot realize the rapid automatic position change of the eyeglass frame, and cannot cooperate with the welding device to complete the rapid automatic welding of the eyeglass frame. Utility Model Content

[0004] In order to solve the above problems, the primary purpose of the utility model is to provide an automatic positioning mechanism for eyeglass frame welding, which can not only support and position the eyeglass frame, but also realize the rapid and automatic replacement of the eyeglass frame, and cooperate with the welding device to complete the rapid and automatic welding of the eyeglass frame.

[0005] Another object of the utility model is to provide an automatic positioning mechanism for welding eyeglass frames, which has a simple structure, stable positioning and is suitable for wide promotion.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] The utility model provides an automatic positioning mechanism for welding a glasses frame, comprising:

[0008] A welding positioning turntable, on which are disposed more than two lens ring positioning structures for positioning the lens ring of the eyeglass frame;

[0009] A center beam positioning structure, used for positioning the center beam of the eyeglass frame;

[0010] There are two welding positioning turntables, which are respectively arranged on both sides of the center beam positioning structure.

[0011] In the present application, the lens ring positioning structures on the welding positioning turntables on both sides can place and position the two lens rings of the eyeglass frame respectively, and the middle beam positioning structure in the middle can place and position the middle beam of the eyeglass frame. Each welding positioning turntable is provided with more than two lens ring positioning structures, one of which is located in the welding area, and the rest are located in the preparation area, and the middle beam positioning structure is always located in the welding area. After the welding equipment welds the middle beam located in the welding area with the two lens rings, the welded eyeglass frame is removed, and a new middle beam is placed on the middle beam positioning structure. At the same time, the welding positioning turntables on both sides are rotated to rotate the lens ring positioning structure originally located in the welding area to the preparation area to install the lens ring to be welded, and one of the lens rings to be welded located in the preparation area is rotated to the welding area for welding, thereby realizing the rapid and automatic position replacement of multiple pre-installed lens rings to be welded in the welding area and the preparation area, and can cooperate with the welding equipment to complete the rapid and automatic welding of the eyeglass frame.

[0012] Furthermore, the welding positioning turntable is connected with a rotation drive structure, and the rotation drive structure includes a rotation drive motor, a first synchronous wheel, a synchronous belt, a second synchronous wheel, and a rotating shaft. The rotating shaft is installed at the bottom of the welding positioning turntable, and the first synchronous wheel is connected to the output end of the rotation drive motor. The second synchronous wheel is sleeved and fixed on the rotating shaft, and the first synchronous wheel and the second synchronous wheel are connected by the synchronous belt transmission. In the present application, the rotation drive motor drives the rotating shaft to rotate through the transmission mechanism composed of the first synchronous wheel, the synchronous belt, and the second synchronous wheel, and then drives the welding positioning turntable to rotate, so as to realize the position switching of the mirror ring positioning structure on the welding positioning turntable between the welding area and the preparation area. The rotation amplitude and frequency of the rotation drive motor are automatically controlled by the system, and its implementation method belongs to the prior art.

[0013] Furthermore, two mirror ring positioning structures are provided, and the two mirror ring positioning structures are symmetrically arranged on the welding positioning turntable. One of the mirror ring positioning structures is located in the welding area, and the other mirror ring positioning structure is located in the preparation area. The rotating drive motor drives the welding positioning turntable to rotate 180 degrees, so that the two mirror ring positioning structures can be switched back and forth between the welding area and the preparation area, which facilitates the welding equipment to realize automated welding.

[0014] Further, the lens ring positioning structure includes a lens ring installation fixture, a front-to-back translation assembly, and a left-to-right translation assembly, the left-to-right translation assembly is installed on the welding positioning turntable, the front-to-back translation assembly is connected to the left-to-right translation assembly, the lens ring installation fixture is connected to the front-to-back translation assembly, and the lens ring installation fixture is provided with a lens ring positioning groove. In the present application, the front-to-back translation assembly and the left-to-right translation assembly cooperate to drive the lens ring installation fixture to move forward and backward and left-to-right, adjust the position of the lens ring, and facilitate welding by the welding equipment.

[0015] Furthermore, the left-right translation assembly includes a left-right translation slider, a screw rod, and an adjustment knob. One end of the screw rod is connected to the left-right translation slider, and the other end is connected to the adjustment knob. The front-back translation assembly is connected to the left-right translation slider. The welding positioning turntable is provided with a fixed groove and a left-right sliding groove. The adjustment knob is arranged in the fixed groove, and the left-right translation slider is movably arranged in the left-right sliding groove. In the present application, by turning the adjustment knob, the left-right translation slider can be driven to move on the screw rod, thereby forcing the left-right translation slider to slide left-right in the left-right sliding groove, and indirectly adjusting the left-right direction position of the lens ring mounting fixture.

[0016] Furthermore, the front-to-back translation assembly includes a front-to-back translation slider and a connecting rod, the lens ring installation fixture is fixed on the front-to-back translation slider, a front-to-back sliding groove is provided on the front-to-back translation slider, one end of the connecting rod is fixed on the left and right translation sliders, and the other end is slidably connected in the front-to-back sliding groove. In the present application, the front-to-back translation slider can slide forward and backward on the left and right translation sliders through the relative movement between the connecting rod and the front-to-back sliding groove, thereby driving the lens ring installation fixture to move forward and backward, and adjusting the position of the lens ring installation fixture in the front-to-back direction.

[0017] Furthermore, the center beam positioning structure includes a center beam positioning support base, a center beam positioning jig, and a center beam positioning pressure piece. The center beam positioning support base is arranged between two welding positioning turntables, the center beam positioning jig is installed on the center beam positioning support base, and the center beam positioning pressure piece is rotatably connected to the center beam positioning support base. In the present application, the center beam positioning jig can be used to install the center beam of the eyeglass frame. During welding, the center beam positioning pressure piece can be rotated to the top of the center beam positioning jig to press the center beam in the beam positioning jig; when not welding, the center beam positioning pressure piece can be detached from the center beam positioning jig by rotation, so as to facilitate the replacement of the center beam. The center beam positioning jig can be fixed on the center beam positioning support base, or it can be movably connected to the center beam positioning support base, so as to facilitate the adjustment of its up and down height and left and right position.

[0018] Furthermore, the center beam positioning pressure piece is a "V"-shaped structure, including a crimping portion arranged at one end, a handle arranged at the other end, and a rotating portion arranged at the bottom, and the rotating portion is rotatably connected to the center beam positioning support base. The "V"-shaped bottom angle of the "V"-shaped structure is used as a rotating bracket angle to form a seesaw structure. The crimping portion at one end can be rotated to abut or disengage from the center beam positioning fixture, and the handle at the other end can facilitate the staff to control the rotation of the center beam positioning pressure piece.

[0019] Furthermore, the automatic positioning mechanism for welding the eyeglass frame also includes a lens ring downward pressing positioning module, which includes a downward pressing positioning member and a lifting drive cylinder, wherein the downward pressing positioning member is connected to the output end of the lifting drive cylinder, and the downward pressing positioning member is arranged above the lens ring installation fixture. When welding is required, the lifting drive cylinder drives the downward pressing positioning member to move downward, presses the lens ring in the lens ring installation fixture, and prevents movement during welding; when welding is completed, the lifting drive cylinder drives the downward pressing positioning member to move upward, and detaches from the lens ring installation fixture.

[0020] Furthermore, the downward pressing positioning member includes two pressing plates protruding outward, and the two pressing plates are respectively arranged above the mirror ring mounting fixtures of the two welding positioning turntables in a one-to-one correspondence, and an avoidance groove is formed between the two pressing plates. The two pressing plates can respectively press and fix the mirror rings located in the welding area on the two welding positioning turntables to avoid them from loosening; the avoidance groove can avoid the middle beam, and can prevent the pressing plate from blocking the middle beam and affecting welding.

[0021] Furthermore, the pressing sheet is in an "L" structure, and the bottom edges of the two pressing sheets "L" are arranged opposite to each other, enclosing a slot with only one notch. The welding head can extend from the slot into the mirror ring installation fixture to weld the connection between the mirror ring and the middle beam, which facilitates the welding operation.

[0022] Furthermore, the automatic positioning mechanism for welding the eyeglass frame also includes a turntable positioning module, which includes a turntable positioning bracket, a turntable positioning cylinder, and a turntable positioning member. The turntable positioning cylinder is fixed on the turntable positioning bracket, and the turntable positioning member is connected to the output end of the turntable positioning cylinder. A limited sliding groove is also provided on the turntable positioning bracket, and the turntable positioning member is slidably connected in the limited sliding groove. A triangular positioning head is provided at the front end of the turntable positioning member, and a triangular positioning groove matching the positioning head is provided on the outer side of the welding positioning turntable. During welding, the positioning head moves toward the welding positioning turntable under the drive of the turntable positioning cylinder, and is inserted into the triangular positioning groove to fix the welding positioning turntable to avoid shaking during welding; after welding is completed, the positioning head is driven by the turntable positioning cylinder to move away from the welding positioning turntable, and the positioning head is separated from the triangular positioning groove, which facilitates the rotation of the welding positioning turntable and realizes the automatic switching of the lens ring.

[0023] Compared with the prior art, the beneficial effects of the utility model are as follows: the automatic positioning mechanism for eyeglass frame welding of the utility model is provided with a plurality of lens ring positioning structures on a rotatable welding positioning turntable. During welding, the plurality of lens rings can be quickly and automatically replaced by rotating the welding positioning turntable, and the rapid and automatic welding of the eyeglass frames can be completed in cooperation with the welding equipment; at the same time, during welding, the lens rings and the center beam can be positioned in the up and down and left and right directions, and has the advantage of stable positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an automatic positioning mechanism for welding eyeglass frames.

[0025] Figure 2 It is a structural schematic diagram of the welding positioning turntable from the first perspective.

[0026] Figure 3 It is a structural schematic diagram of the welding positioning turntable from a second perspective.

[0027] Figure 4 It is a structural diagram of the center beam positioning structure.

[0028] Figure 5 It is a structural schematic diagram of the mirror ring downward pressure positioning module.

[0029] Figure 6 It is a structural diagram of the turntable positioning module. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] To achieve the above purpose, the technical solution of the utility model is as follows:

[0032] See also Figure 1-6 As shown, this embodiment provides an automatic positioning mechanism for welding eyeglass frames, comprising:

[0033] A welding positioning turntable 1, on which are disposed more than two lens ring positioning structures 2 for positioning the lens ring of the eyeglass frame;

[0034] A middle beam positioning structure 3, used for positioning the middle beam of the eyeglass frame;

[0035] Two welding positioning turntables 1 are provided, and the two welding positioning turntables 1 are respectively arranged on both sides of the center beam positioning structure 3 .

[0036] In the present application, the lens ring positioning structures 2 on the welding positioning turntables 1 on both sides can place and position the two lens rings of the eyeglass frame respectively, and the middle beam positioning structure 3 in the middle can place and position the middle beam of the eyeglass frame. Each welding positioning turntable 1 is provided with more than two lens ring positioning structures 2, one of which is located in the welding area, and the rest are located in the preparation area, and the middle beam positioning structure 3 is always located in the welding area. After the welding equipment welds the middle beam located in the welding area with the two lens rings, the welded eyeglass frame is removed, and a new middle beam is placed on the middle beam positioning structure 3. At the same time, the welding positioning turntables 1 on both sides are rotated, and the lens ring positioning structure 2 originally located in the welding area is rotated to the preparation area to install the lens ring to be welded, and one of the lens rings to be welded located in the preparation area is rotated to the welding area for welding, thereby realizing the rapid and automatic position replacement of multiple pre-installed lens rings to be welded in the welding area and the preparation area, and can cooperate with the welding equipment to complete the rapid and automatic welding of the eyeglass frame.

[0037] Furthermore, the welding positioning turntable 1 is connected with a rotation drive structure 4, which includes a rotation drive motor 41, a first synchronous wheel 42, a synchronous belt 43, a second synchronous wheel 44, and a rotating shaft 45. The rotating shaft 45 is installed at the bottom of the welding positioning turntable 1, the first synchronous wheel 42 is connected to the output end of the rotation drive motor 41, the second synchronous wheel 44 is sleeved and fixed on the rotating shaft 45, and the first synchronous wheel 42 and the second synchronous wheel 44 are connected by a synchronous belt 43. In the present application, the rotation drive motor 41 drives the rotating shaft 45 to rotate through the transmission mechanism composed of the first synchronous wheel 42, the synchronous belt 43, and the second synchronous wheel 44, thereby driving the welding positioning turntable 1 to rotate, so as to realize the switching of the mirror ring positioning structure 2 on the welding positioning turntable 1 between the welding area and the preparation area. The rotation amplitude and frequency of the rotation drive motor 41 are automatically controlled by the system, and its implementation method belongs to the prior art.

[0038] In this embodiment, two mirror ring positioning structures 2 are provided, and the two mirror ring positioning structures 2 are symmetrically arranged on the welding positioning turntable 1. One of the mirror ring positioning structures 2 is located in the welding area, and the other mirror ring positioning structure 2 is located in the preparation area. The rotating drive motor 41 drives the welding positioning turntable 1 to rotate 180 degrees, so that the two mirror ring positioning structures 2 can be switched back and forth between the welding area and the preparation area, which facilitates the welding equipment to realize automated welding.

[0039] Further, the lens ring positioning structure 2 includes a lens ring installation fixture 21, a front-to-back translation assembly 22, and a left-to-right translation assembly 23. The left-to-right translation assembly 23 is installed on the welding positioning turntable 1. The front-to-back translation assembly 22 is connected to the left-to-right translation assembly 23. The lens ring installation fixture 21 is connected to the front-to-back translation assembly 22. The lens ring installation fixture 21 is provided with a lens ring positioning groove 211. In the present application, the front-to-back translation assembly 22 and the left-to-right translation assembly 23 cooperate to drive the lens ring installation fixture 21 to move forward and backward and left and right, adjust the position of the lens ring, and facilitate welding by the welding equipment.

[0040] Furthermore, the left-right translation assembly 23 includes a left-right translation slider 231, a screw rod 232, and an adjusting knob 233. One end of the screw rod 232 is connected to the left-right translation slider 231, and the other end is connected to the adjusting knob 233. The front-back translation assembly 22 is connected to the left-right translation slider 231. The welding positioning turntable 1 is provided with a fixed groove 11 and a left-right sliding groove 12. The adjusting knob 233 is provided in the fixed groove 11, and the left-right translation slider 231 is movably provided in the left-right sliding groove 12. In the present application, by turning the adjusting knob 233, the left-right translation slider 231 can be driven to move on the screw rod 232, thereby forcing the left-right translation slider 231 to slide left and right in the left-right sliding groove 12, and indirectly adjusting the left-right direction position of the lens ring mounting fixture 21.

[0041] Further, the front-to-back translation assembly 22 includes a front-to-back translation slider 221 and a connecting rod 222. The lens ring installation fixture 21 is fixed on the front-to-back translation slider 221. The front-to-back translation slider 221 is provided with a front-to-back sliding groove 223. One end of the connecting rod 222 is fixed on the left-right translation slider 231, and the other end is slidably connected in the front-to-back sliding groove 223. In the present application, the front-to-back translation slider 221 can slide forward and backward on the left-right translation slider 231 through the relative movement between the connecting rod 222 and the front-to-back sliding groove 223, thereby driving the lens ring installation fixture 21 to move forward and backward, and adjusting the position of the lens ring installation fixture 21 in the front-to-back direction.

[0042] Further, the center beam positioning structure 3 includes a center beam positioning support base 31, a center beam positioning fixture 32, and a center beam positioning pressure piece 33. The center beam positioning support base 31 is arranged between the two welding positioning turntables 1, the center beam positioning fixture 32 is installed on the center beam positioning support base 31, the center beam positioning pressure piece 33 is rotatably connected to the center beam positioning support base 31, and the center beam positioning fixture 32 is provided with a center beam positioning groove 321. In the present application, the center beam positioning fixture 32 can be used to install the center beam of the eyeglass frame. When welding, the center beam positioning pressure piece 33 can be rotated to the top of the center beam positioning fixture 32 to press the center beam in the beam positioning fixture; when not welding, the center beam positioning pressure piece 33 can be detached from the center beam positioning fixture 32 by rotation, so as to facilitate the replacement of the center beam. The center beam positioning fixture 32 can be fixed on the center beam positioning support base 31, or it can be movably connected to the center beam positioning support base 31, so as to facilitate the adjustment of its up and down height and left and right position.

[0043] Furthermore, the center beam positioning pressure piece 33 is a "V"-shaped structure, including a crimping portion 331 disposed at one end, a handle 332 disposed at the other end, and a rotating portion 333 disposed at the bottom. A hinged base 34 is disposed on the center beam positioning support base 31, and the rotating portion 333 is rotatably connected to the hinged base 34. The "V"-shaped bottom angle of the "V"-shaped structure is used as a rotating bracket angle to form a seesaw structure. The crimping portion 331 at one end can be rotated to abut or disengage from the center beam positioning fixture 32, and the handle 332 at the other end can facilitate the staff to control the rotation of the center beam positioning pressure piece 33.

[0044] Furthermore, the automatic positioning mechanism for welding of the eyeglass frame of the present embodiment further includes a lens ring pressing down positioning module 5, which includes a pressing down positioning member 51 and a lifting drive cylinder 52. The pressing down positioning member 51 is connected to the output end of the lifting drive cylinder 52, and the pressing down positioning member 51 is arranged above the lens ring installation fixture 21. When welding is required, the lifting drive cylinder 52 drives the pressing down positioning member 51 to move downward, pressing the lens ring in the lens ring installation fixture 21 to prevent movement during welding; when welding is completed, the lifting drive cylinder 52 drives the pressing down positioning member 51 to move upward and detach from the lens ring installation fixture 21.

[0045] Furthermore, the downward positioning member 51 includes two pressing pieces 511 protruding outward, and the two pressing pieces 511 are respectively arranged above the mirror ring mounting fixtures 21 of the two welding positioning turntables 1 in a one-to-one correspondence, and the two pressing pieces 511 are disconnected to form an avoidance groove 512. The two pressing pieces 511 can respectively press and fix the mirror rings located in the welding area on the two welding positioning turntables 1 to avoid them from loosening; the avoidance groove 512 can avoid the middle beam, and can prevent the pressing piece 511 from blocking the middle beam and affecting welding.

[0046] Furthermore, the pressing plate 511 is in an "L" structure, and the bottom edges of the two pressing plates 511 are arranged opposite to each other to enclose a slot with only one notch. The welding head can extend from the slot into the lens ring installation fixture 21 to weld the connection between the lens ring and the middle beam, which facilitates the welding operation.

[0047] Furthermore, the automatic positioning mechanism for welding the eyeglass frame of the present embodiment also includes a turntable positioning module 6, the turntable positioning module 6 includes a turntable positioning bracket 61, a turntable positioning cylinder 62, and a turntable positioning member 63, the turntable positioning cylinder 62 is fixed on the turntable positioning bracket 61, the turntable positioning member 63 is connected to the output end of the turntable positioning cylinder 62, and a limiting slide groove 65 is also provided on the turntable positioning bracket 61, the turntable positioning member 63 is slidably connected in the limiting slide groove 65, and a triangular positioning head 64 is provided at the front end of the turntable positioning member 63, and a triangular positioning groove 13 adapted to the positioning head 64 is provided on the outer side surface of the welding positioning turntable 1. During welding, the positioning head 64 moves toward the welding positioning turntable 1 under the drive of the turntable positioning cylinder 62, and is inserted into the triangular positioning groove 13, thereby fixing the welding positioning turntable 1 to prevent shaking during welding; after welding is completed, the positioning head 64 moves away from the welding positioning turntable 1 under the drive of the turntable positioning cylinder 62, and the positioning head 64 is separated from the triangular positioning groove 13, which facilitates the rotation of the welding positioning turntable 1 and realizes the automatic switching of the mirror ring.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic positioning mechanism for welding eyeglass frames, characterized in that: include: A welding positioning turntable, on which are disposed more than two lens ring positioning structures for positioning the lens ring of the eyeglass frame; A center beam positioning structure, used for positioning the center beam of the eyeglass frame; There are two welding positioning turntables, which are respectively arranged on both sides of the center beam positioning structure.

2. The automatic positioning mechanism for welding eyeglass frames according to claim 1, characterized in that: The welding positioning turntable is connected to a rotation driving structure, which includes a rotation driving motor, a first synchronous wheel, a synchronous belt, a second synchronous wheel, and a rotating shaft. The rotating shaft is installed at the bottom of the welding positioning turntable, the first synchronous wheel is connected to the output end of the rotation driving motor, the second synchronous wheel is sleeved and fixed on the rotating shaft, and the first synchronous wheel and the second synchronous wheel are connected through the synchronous belt transmission.

3. The automatic positioning mechanism for welding eyeglass frames according to claim 1, characterized in that: The mirror ring positioning structures are provided with two, and the two mirror ring positioning structures are symmetrically arranged on the welding positioning turntable.

4. The automatic positioning mechanism for welding eyeglass frames according to claim 1, characterized in that: The mirror ring positioning structure includes a mirror ring mounting fixture, a front-to-back translation assembly, and a left-to-right translation assembly. The left-to-right translation assembly is mounted on a welding positioning turntable. The front-to-back translation assembly is connected to the left-to-right translation assembly. The mirror ring mounting fixture is connected to the front-to-back translation assembly. A mirror ring positioning groove is provided on the mirror ring mounting fixture.

5. The automatic positioning mechanism for welding eyeglass frames as claimed in claim 4, characterized in that: The left-right translation assembly includes a left-right translation slider, a screw rod, and an adjusting knob. One end of the screw rod is connected to the left-right translation slider, and the other end is connected to the adjusting knob. The front-back translation assembly is connected to the left-right translation slider. The welding positioning turntable is provided with a fixed groove and left-right sliding grooves. The adjusting knob is arranged in the fixed groove, and the left-right translation slider is movably arranged in the left-right sliding grooves.

6. The automatic positioning mechanism for welding eyeglass frames as claimed in claim 5, characterized in that: The front-to-back translation assembly includes a front-to-back translation slider and a connecting rod. The lens ring mounting fixture is fixed on the front-to-back translation slider. The front-to-back translation slider is provided with a front-to-back sliding groove. One end of the connecting rod is fixed on the left and right translation sliders, and the other end is slidably connected to the front-to-back sliding groove.

7. The automatic positioning mechanism for welding eyeglass frames according to claim 1, characterized in that: The center beam positioning structure includes a center beam positioning support base, a center beam positioning fixture, and a center beam positioning pressure piece. The center beam positioning support base is arranged between two welding positioning turntables, the center beam positioning fixture is installed on the center beam positioning support base, and the center beam positioning pressure piece is rotatably connected to the center beam positioning support base.

8. The automatic positioning mechanism for welding eyeglass frames as claimed in claim 7, characterized in that: The center beam positioning pressure piece is a "V"-shaped structure, including a crimping portion arranged at one end, a handle arranged at the other end, and a rotating portion arranged at the bottom, and the rotating portion is rotatably connected to the center beam positioning support base.

9. The automatic positioning mechanism for welding eyeglass frames as claimed in claim 4, characterized in that: The automatic positioning mechanism for welding the eyeglass frame also includes a lens ring pressing down positioning module, the lens ring pressing down positioning module includes a pressing down positioning member and a lifting drive cylinder, the pressing down positioning member is connected to the output end of the lifting drive cylinder, and the pressing down positioning member is arranged above the lens ring mounting fixture; The downward pressing positioning member includes two pressing plates protruding outward, and the two pressing plates are respectively arranged above the mirror ring mounting fixtures of the two welding positioning turntables in a one-to-one correspondence, and an avoidance groove is formed between the two pressing plates; The pressing sheet is in an "L" structure, and the bottom edges of the two pressing sheets "L" are arranged opposite to each other to enclose a slot with only one notch.

10. The automatic positioning mechanism for welding eyeglass frames according to claim 1, characterized in that: The automatic positioning mechanism for welding the eyeglass frame also includes a turntable positioning module, which includes a turntable positioning bracket, a turntable positioning cylinder, and a turntable positioning piece. The turntable positioning cylinder is fixed to the turntable positioning bracket, and the turntable positioning piece is connected to the output end of the turntable positioning cylinder. A limiting slide groove is also provided on the turntable positioning bracket, and the turntable positioning piece is slidably connected in the limiting slide groove. A triangular positioning head is provided at the front end of the turntable positioning piece, and a triangular positioning groove matching the positioning head is provided on the outer side surface of the welding positioning turntable.

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