Sawing machine with positioning structure for producing optical mold and production method of sawing machine

Abstract

The invention discloses a sawing machine with a positioning structure for optical mold production and a production method of the sawing machine, and relates to the technical field of optical mold cutting. The sawing machine with the positioning structure for optical mold production comprises a device shell, the outer wall of the device shell is fixedly connected with a supporting table, and the outer wall of the device shell is fixedly connected with a sawing wheel; the outer wall of the top of the supporting table is fixedly connected with a supporting plate, the outer wall of the top of the supporting plate is fixedly connected with a fixing device, a workpiece is placed on the outer wall of the top of the supporting plate, and when the workpiece needs to be machined, air cylinders on the left side and the right side are started at the same time, and a fixing rod moves towards the workpiece to drive a first fixing plate to move together; the first fixing plate pushes the second fixing plate to be close to the workpiece, when the workpiece is extruded, the connecting rod extrudes the spring till the second fixing plate is attached to the first fixing plate, at the moment, the two sides of the workpiece are completely fixed, manual fixing of workers is not needed, the situation that workers are injured during cutting is prevented, and the labor cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting optical moulds, in particular to a sawing machine with a positioning structure for producing optical moulds and a production method thereof. Background Art

[0002] A sawing machine is a machine tool used to cut metal or other hard materials. It uses the reciprocating or rotating motion of a saw blade to cut the material. Saws are widely used in industries such as machinery manufacturing, automotive, aerospace, mold making, and metalworking, primarily for cutting raw materials, machining parts, and performing sizing operations.

[0003] Traditional sawing machines used in optical mold production cannot position and press the optical molds. Therefore, workers need to manually press and cut during the cutting process. The saw wheel can easily cause injuries to workers during the cutting process. In addition, during the cutting process, the extreme pressure may cause the workpiece to warp, increasing the difficulty of cutting. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a sawing machine for producing optical molds with a positioning structure and a production method thereof, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a sawing machine for optical mold production with a positioning structure, comprising a device shell, an outer wall of the device shell is fixedly connected to a support table, an outer wall of the device shell is fixedly connected to a saw blade, a top outer wall of the support table is fixedly connected to a support plate, a top outer wall of the support plate is fixedly connected to a fixing device that can automatically fix a workpiece, a bottom outer wall of the fixing device is fixedly connected to an anti-warping device that prevents jitter caused by cutting from affecting workpiece processing, the anti-warping device is fixedly connected to a positioning device that can position the workpiece, and the top outer wall of the support plate is in contact with the workpiece;

[0006] Among them, the fixing device includes a cylinder, a fixing rod, a fixing plate 1, a fixing plate 2, a connecting rod, a return spring 1 and a connecting plate 1; the cylinder is fixedly connected to the top outer wall of the support plate, and a fixing rod is provided at the output end of the cylinder, and the fixing rod is fixedly connected to the fixing plate 1 on the outer wall away from one end of the cylinder, a hole is opened on the fixing plate 1, and a connecting rod is slidably connected to the hole, and the outer wall of the connecting rod is fixedly connected to the fixing plate 2.

[0007] According to the above technical solution, the outer wall of the connecting rod away from the fixed plate 2 is fixedly connected to the return spring 1.

[0008] According to the above technical solution, one end of the return spring 1 away from the connecting rod is fixedly connected to the connecting plate 1, and the connecting plate 1 is fixedly connected to the outer wall of the fixed plate 1.

[0009] According to the above technical solution, the anti-warping device includes a connecting plate 2, a push rod, a return spring 2, a slider, an inclined block 1, a fixed plate 3, a threaded rod, an anti-warping plate, a return spring 3 and a limit block. The connecting plate 2 is fixedly connected to the top outer wall of the fixed plate 1, and the outer wall of the connecting plate 2 is fixedly connected to the push rod.

[0010] According to the above technical solution, the outer wall of the connecting plate 2 is fixedly connected to the reset spring 2, the end of the reset spring 2 is fixedly connected to the slider, the inclined block 1 is arranged on the top outer wall of the fixed plate 2, and the outer wall of the inclined block 1 is fixedly connected to the fixed plate 3.

[0011] According to the above technical solution, a screw hole is provided on the fixed plate three, and is threadedly connected by a threaded rod. The bottom outer wall of the threaded rod is fixedly connected to the anti-warping edge plate. A groove is provided on the fixed plate two. The bottom outer wall of the inclined block one is fixedly connected to the reset spring three. The end of the reset spring three is fixedly connected to the bottom of the groove of the fixed plate two. The two sides of the inclined block one are fixedly connected to the limiting blocks, and the limiting blocks are slidably connected in the groove of the fixed plate two.

[0012] According to the above technical solution, the positioning device includes an inclined block 2, a return spring 4, a connecting plate 3, an inclined block 3, a return spring 5, a limit rod, a rotating sleeve, a rotating shaft and a positioning rod. The inclined block 2 is attached to the outer wall of the fixed plate 1, and the outer wall of the inclined block 2 is fixedly connected to the return spring 4. The end of the return spring 4 is fixed to the outer wall of the connecting plate 3. The connecting plate 3 is slidingly connected with the inclined block 3. The outer wall of the inclined block 3 is fixedly connected to the return spring 5, and the outer wall of the inclined block 3 is fixedly connected to the limit rod.

[0013] According to the above technical solution, a rotation groove is opened on the rotating sleeve, the outer wall of the limiting rod fits in the rotation groove on the rotating sleeve, the inner wall of the rotating sleeve is fixedly connected to the rotating shaft, and the bottom outer wall of the rotating shaft is fixedly connected to the positioning rod.

[0014] A method for producing an optical mold, the sawing machine for producing an optical mold with a positioning structure as described above, comprises the following steps:

[0015] S1. When the workpiece needs to be cut, the workpiece is placed on the support plate, the cylinder is started, and the fixed rod at the output end of the cylinder moves toward the workpiece, and the workpiece is clamped by the second fixed plate. At this time, both sides of the workpiece are fixed;

[0016] S2, when the fixed plate 2 moves toward the fixed plate 1, it will drive the slider to move toward the push rod. At this time, the slider is squeezed by the push rod and moves toward the oblique block 1 until it squeezes the oblique block 1. When the oblique block 1 is squeezed, it drives the fixed plate 3 fixed on its outer wall to move downward, driving the threaded rod to move downward as well. The threaded rod drives the anti-warping side plate at its bottom to move downward until the anti-warping side plate presses against the workpiece, completing the fixation of the upper two sides of the workpiece;

[0017] S3. When the fixed plate 2 moves toward the fixed plate 1, the fixed plate 2 squeezes the oblique block 2, and through the cooperation of the connecting plate 3, the oblique block 3, the limiting rod, the rotating sleeve and the rotating shaft, the positioning rod fixed to the rotating shaft rotates toward the workpiece, completing the center positioning of the workpiece;

[0018] S4. By starting the cutting device, the saw blade starts to rotate and starts cutting the workpiece.

[0019] The present invention provides a sawing machine with a positioning structure for producing optical molds and a production method thereof. It has the following beneficial effects:

[0020] 1. The present invention provides a fixing device. When the workpiece needs to be cut, the workpiece is placed on the support plate. At this time, the cylinder is started, and the cylinders on the left and right sides are started at the same time. The fixing rod moves toward the workpiece and moves together with the fixing plate one. The fixing plate one pushes the fixing plate two close to the workpiece. When the workpiece is squeezed, the connecting rod squeezes the spring until the fixing plate two fits the fixing plate one. At this time, both sides of the workpiece are completely fixed, and there is no need for workers to manually fix it, which prevents injuries to workers during cutting and reduces labor costs. Moreover, by providing a connecting rod and a reset spring one, when the fixing plate two is squeezed into the workpiece, the reset spring one is compressed by the connecting rod, so that the fixing plate two will not cause pinching to the workpiece due to excessive squeezing force.

[0021] 2. The present invention is provided with an anti-warping device. When the fixed plate 2 squeezes the workpiece, the push rod pushes the slider toward the inclined block 1 for squeezing. The inclined block 1 is squeezed and moves downward until it rests against the upper two sides of the workpiece. At the same time, a threaded rod is provided to manually control the height of the anti-warping plate, so that the device can adapt to workpieces of different heights, preventing the workpiece from warping and shaking due to vibration during cutting, which affects the processing accuracy of the workpiece.

[0022] 3. The present invention sets a positioning device. When the fixed plate 2 fixes the workpiece and moves toward the fixed plate 1, it will squeeze the inclined block 2. The inclined block 2 drives the limit rod to move upward by squeezing the inclined block 3. Because the limit rod is stuck in the rotating groove of the rotating sleeve, it drives the rotating sleeve to rotate, and the rotating sleeve drives the internal rotating shaft to rotate, so that the positioning rod rotates toward the workpiece and pushes it to the center point, preventing cutting errors caused by inaccurate workpiece placement. There is no need to manually calibrate the workpiece position, saving time and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic structural diagram of the fixing device of the present invention;

[0025] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0026] Figure 4 Schematic diagram of the structure of the anti-warping device of the present invention;

[0027] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at point B;

[0028] Figure 6 It is a side sectional view of the present invention;

[0029] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at C;

[0030] Figure 8 This is a schematic diagram of the structure of the limit block of the present invention;

[0031] In the figure: 1. Device shell; 2. Support table; 3. Saw blade; 4. Support plate; 5. Fixing device; 51. Cylinder; 52. Fixing rod; 53. Fixing plate 1; 54. Fixing plate 2; 55. Connecting rod; 56. Reset spring 1; 57. Connecting plate 1; 6. Anti-warping device; 61. Connecting plate 2; 62. Push rod; 63. Reset spring 2; 64. Slider; 65. Bevel block 1; 66. Fixing plate 3; 67. Threaded rod; 68. Anti-warping plate; 69. Reset spring 3; 610. Limit block; 7. Positioning device; 71. Bevel block 2; 72. Reset spring 4; 73. Connecting plate 3; 74. Bevel block 3; 75. Reset spring 5; 76. Limiting rod; 77. Rotating sleeve; 78. Rotating shaft; 79. Positioning rod; 8. Workpiece. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1-8One embodiment of the present invention is: a sawing machine for optical mold production with a positioning structure, comprising a device shell 1, the outer wall of the device shell 1 is fixedly connected to the support platform 2, the outer wall of the device shell 1 is fixedly connected to the saw blade 3, the top outer wall of the support platform 2 is fixedly connected to the support plate 4, the top outer wall of the support plate 4 is fixedly connected to a fixing device 5 that can automatically fix the workpiece 8, and the top outer wall of the support plate 4 is attached to the workpiece 8; wherein, the fixing device 5 comprises a cylinder 51, a fixing rod 52, a fixing plate 1 53, a fixing plate 2 54, a connecting rod 55, a return spring 1 56 and a connecting plate 1 57; the cylinder 51 is fixedly connected to the top outer wall of the support plate 4, a fixing rod 52 is provided at the output end of the cylinder 51, the outer wall of the fixing rod 52 away from one end of the cylinder 51 is fixedly connected to the fixing plate 1 53, a hole is opened on the fixing plate 1 53, and a connecting rod 55 is slidably connected to the hole, and the outer wall of the connecting rod 55 is fixedly connected to the fixing plate 2 54.

[0034] This embodiment also provides a method for producing an optical mold, comprising the following steps:

[0035] S1. When the workpiece 8 needs to be cut, the workpiece 8 is placed on the support plate 4, and the cylinder 51 is started. The fixed rod 52 at the output end of the cylinder 51 moves toward the workpiece 8, and the workpiece 8 is clamped by the fixing plate 2 54. At this time, both sides of the workpiece 8 are fixed;

[0036] S2. When the second fixing plate 54 moves toward the first fixing plate 53, it drives the slider 64 to move toward the push rod 62. At this time, the slider 64 is squeezed by the push rod 62 and moves toward the oblique block 1 65 until it squeezes the oblique block 1 65. When the oblique block 1 65 is squeezed, it drives the third fixing plate 66 fixed on its outer wall to move downward, and drives the threaded rod 67 to move downward as well. The threaded rod 67 drives the anti-warping side plate 68 at its bottom to move downward until the anti-warping side plate 68 abuts against the workpiece 8, thereby completing the fixation of the upper two sides of the workpiece 8.

[0037] S3, when the second fixing plate 54 moves toward the first fixing plate 53, the second fixing plate 54 squeezes the second bevel block 71, and through the cooperation of the third connecting plate 73, the third bevel block 74, the limiting rod 76, the rotating sleeve 77 and the rotating shaft 78, the positioning rod 79 fixed to the rotating shaft 78 rotates toward the workpiece 8, completing the center positioning of the workpiece 8;

[0038] S4: By starting the cutting device, the saw blade 3 starts to rotate and starts cutting the workpiece 8

[0039] When the workpiece 8 needs to be cut, the workpiece 8 is placed on the support plate 4. At this time, the cylinder 51 is started, and the cylinders 51 on the left and right sides are started at the same time. The fixing rod 52 moves toward the workpiece 8 and moves with the fixing plate 1 53. The fixing plate 1 53 pushes the fixing plate 2 54 close to the workpiece 8. When the workpiece 8 is squeezed, the connecting rod 55 squeezes the return spring 1 56 until the fixing plate 2 54 fits the fixing plate 1 53. At this time, both sides of the workpiece 8 are completely fixed, and there is no need for workers to manually fix it, which prevents injuries to workers during cutting and reduces labor costs.

[0040] When working in this example, when it is necessary to cut the workpiece 8, the workpiece 8 is placed above the support plate 4, the cutting device is started, the saw blade 3 starts to rotate and starts to cut the workpiece 8, and when the cylinder 51 is started, the fixed rod 52 at the output end of the cylinder 51 moves toward the workpiece 8, and drives the fixed plate 1 53 to move toward the workpiece 8. In the process of moving toward the workpiece 8, the fixed plate 1 53 drives the fixed plate 2 54 to move toward the workpiece 8 at the same time. When the fixed plate 2 54 is against the workpiece 8, the fixed plate 2 54 is moved toward the fixed plate 1 53 by the pressure of the workpiece 8, and drives the connecting rod 55 to move toward the connecting plate 1 57. At this time, the connecting rod 55 will squeeze the reset spring 1 56 until the fixed plate 2 54 completely reaches the fixed plate 1 53, and the two sides of the workpiece 8 are fixed at this time.

[0041] See also Figures 1-8 On the basis of the above embodiment, another embodiment of the present invention is as follows: the outer wall of the bottom surface of the fixing device 5 is provided with an anti-warping device 6 for preventing the workpiece 8 from warping during processing; a positioning device 7 is provided on the top of the support plate 4; the anti-warping device 6 includes a second connecting plate 61, a push rod 62, a second return spring 63, a slider 64, a first oblique block 65, a third fixing plate 66, a threaded rod 67, an anti-warping plate 68, a third return spring 69 and a limit block 610; the second connecting plate 61 is fixedly connected to the outer wall of the top end of the fixing plate 53; the outer wall of the second connecting plate 61 is fixedly connected to the push rod 62; the outer wall of the second connecting plate 61 is fixedly connected to the second return spring 63; The end of the positioning spring 2 63 is fixedly connected to the slider 64, the oblique block 1 65 is arranged on the top outer wall of the fixed plate 2 54, the outer wall of the oblique block 1 65 is fixedly connected to the fixed plate 3 66, the fixed plate 3 66 is provided with a screw hole, and is threadedly connected by a threaded rod 67, the bottom outer wall of the threaded rod 67 is fixedly connected to the anti-warping edge plate 68, the fixed plate 2 54 is provided with a groove, the bottom outer wall of the oblique block 1 65 is fixedly connected to the reset spring 3 69, the end of the reset spring 3 69 is fixedly connected to the bottom of the groove of the fixed plate 2 54, the two sides of the oblique block 1 65 are fixedly connected to the limiting blocks 610, and the limiting blocks 610 are slidably connected in the groove of the fixed plate 2 54.

[0042] When the fixed plate 2 54 squeezes the workpiece 8, the push rod 62 pushes the slider 64 toward the inclined block 1 65 to squeeze it. The inclined block 1 65 is squeezed and moves downward until it rests against the upper two sides of the workpiece 8. At the same time, a threaded rod 67 is provided to manually control the height of the anti-warping plate 68, so that the device can adapt to workpieces 8 of different heights, preventing the workpiece 8 from warping and shaking due to vibration during cutting, which affects the processing accuracy of the workpiece 8.

[0043] The positioning device 7 includes an inclined block 2 71, a return spring 4 72, a connecting plate 3 73, an inclined block 3 74, a return spring 5 75, a limiting rod 76, a rotating sleeve 77, a rotating shaft 78 and a positioning rod 79. The inclined block 2 71 is attached to the outer wall of the fixed plate 1 53. The outer wall of the inclined block 2 71 is fixedly connected to the return spring 4 72. The end of the return spring 4 72 is fixed to the outer wall of the connecting plate 3 73. The connecting plate 3 73 is slidingly connected with the inclined block 3 74. The outer wall of the inclined block 3 74 is fixedly connected to the return spring 5 75. The outer wall of the inclined block 3 74 is fixedly connected to the limiting rod 76. The top of the connecting plate 3 73 is rotatably installed with a rotating sleeve 77. A rotating groove is provided on the rotating sleeve 77. The outer wall of the limiting rod 76 fits into the rotating groove on the rotating sleeve 77. The inner wall of the rotating sleeve 77 is fixedly connected to the rotating shaft 78. The bottom outer wall of the rotating shaft 78 is fixedly connected to the positioning rod 79.

[0044] When the fixing plate 2 54 fixes the workpiece 8 and moves toward the fixing plate 1 53, it will squeeze the inclined block 2 71. The inclined block 2 71 drives the limit rod 76 to move upward by squeezing the inclined block 3 74. Because the limit rod 76 is stuck in the rotating groove of the rotating sleeve 77, it drives the rotating sleeve 77 to rotate. The rotating sleeve 77 drives the rotating shaft 78 inside it to rotate, so that the positioning rod 79 rotates toward the direction of the workpiece 8 until it is pushed to the center point, preventing cutting errors caused by inaccurate placement of the workpiece 8. There is no need to manually calibrate the position of the workpiece 8, saving time and labor costs.

[0045] When this example is working: in the process of fixing the workpiece 8 by the fixing device 5, the fixing plate 2 54 will drive the slider 64 to move in the direction of the push rod 62 during the process of moving toward the fixing plate 1 53. At this time, the slider 64 is squeezed by the push rod 62 and moves in the direction of the inclined block 1 65 until it squeezes the inclined block 1 65. The inclined block 1 65 is squeezed, and because the limit blocks 610 fixed on both sides of the inclined block 1 65 are stuck in the groove of the fixing plate 2 54, the inclined block 1 65 moves downward to squeeze the reset spring 3 69. When the inclined block 1 65 moves downward, it drives the fixing plate 3 66 fixed on its outer wall to move downward. The fixing plate 3 66 is threadedly connected to the threaded rod 67, thereby driving the threaded rod 67 to move downward as well. The threaded rod 67 drives the anti-warping edge plate 68 at its bottom to move downward until the anti-warping edge plate 68 is The warping plate 68 presses against the workpiece 8, completing the fixation of the upper two sides of the workpiece 8 to prevent the workpiece 8 from warping during processing, and when the fixed plate 2 54 moves toward the fixed plate 1 53, the fixed plate 2 54 squeezes the inclined block 2 71, and the inclined block 2 71 is squeezed and moves toward the reset spring 4 72. When the inclined block 2 71 moves toward the reset spring 4 72, it will squeeze the inclined block 3 74, and the inclined block 3 74 is squeezed and moves upward, squeezing the reset spring 5 75, and at the same time driving the limit rod 76 to move upward. Because the limit rod 76 is stuck in the rotating groove of the rotating sleeve 77, when the limit rod 76 rises, the rotating sleeve 77 rotates, and the rotation of the rotating sleeve 77 drives the rotating shaft 78 to rotate, so that the positioning rod 79 fixed to the rotating shaft 78 rotates toward the workpiece 8, completing the center positioning of the workpiece 8.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sawing machine for producing optical molds with a positioning structure, comprising a device shell (1), characterized in that: The outer wall of the device shell (1) is fixedly connected to the support platform (2), the outer wall of the device shell (1) is fixedly connected to the saw blade (3), the top outer wall of the support platform (2) is fixedly connected to the support plate (4), the top outer wall of the support plate (4) is fixedly connected to a fixing device (5) that can automatically fix the workpiece (8), the bottom outer wall of the fixing device (5) is provided with an anti-warping device (6) that prevents the workpiece (8) from warping, the top of the support plate (4) is provided with a positioning device (7), and the top outer wall of the support plate (4) is in contact with the workpiece (8); The fixing device (5) comprises a cylinder (51), a fixing rod (52), a fixing plate 1 (53), a fixing plate 2 (54), a connecting rod (55), a return spring 1 (56) and a connecting plate 1 (57); the cylinder (51) is fixedly connected to the top outer wall of the support plate (4); a fixing rod (52) is provided at the output end of the cylinder (51); the fixing rod (52) is fixedly connected to the outer wall of the fixing plate 1 (53) away from one end of the cylinder (51); a hole is provided on the fixing plate 1 (53), and the hole is slidably connected to the connecting rod (55); the outer wall of the connecting rod (55) is fixedly connected to the fixing plate 2 (54).

2. The sawing machine for producing optical molds with a positioning structure according to claim 1, characterized in that: The outer wall of the connecting rod (55) away from the second fixing plate (54) is fixedly connected to the first return spring (56).

3. The sawing machine for producing optical molds with a positioning structure according to claim 2, characterized in that: One end of the return spring 1 (56) away from the connecting rod (55) is fixedly connected to a connecting plate 1 (57), and the connecting plate 1 (57) is fixedly connected to the outer wall of the fixed plate 1 (53).

4. The sawing machine for producing optical molds with a positioning structure according to claim 3, characterized in that: The anti-warping device (6) includes a second connecting plate (61), a push rod (62), a second return spring (63), a slider (64), an inclined block (65), a third fixed plate (66), a threaded rod (67), an anti-warping plate (68), a third return spring (69) and a limit block (610), wherein the second connecting plate (61) is fixedly connected to the top outer wall of the first fixed plate (53), and the outer wall of the second connecting plate (61) is fixedly connected to the push rod (62).

5. The sawing machine for producing optical molds with a positioning structure according to claim 4, characterized in that: The outer wall of the connecting plate 2 (61) is fixedly connected to the return spring 2 (63), the end of the return spring 2 (63) is fixedly connected to the slider (64), the inclined block 1 (65) is arranged on the top outer wall of the fixed plate 2 (54), and the outer wall of the inclined block 1 (65) is fixedly connected to the fixed plate 3 (66).

6. The sawing machine for producing optical molds with a positioning structure according to claim 5, characterized in that: The fixing plate 3 (66) is provided with a screw hole and is threadedly connected by a threaded rod (67). The bottom outer wall of the threaded rod (67) is fixedly connected to the anti-warping edge plate (68). The fixing plate 2 (54) is provided with a groove. The bottom outer wall of the inclined block 1 (65) is fixedly connected to the reset spring 3 (69). The end of the reset spring 3 (69) is fixedly connected to the bottom of the fixing plate 2 (54). The two sides of the inclined block 1 (65) are fixedly connected to the limit block (610), and the limit block (610) is slidably connected in the fixing plate 2 (54).

7. The sawing machine for producing optical molds with a positioning structure according to claim 6, characterized in that: The positioning device (7) includes an inclined block 2 (71), a return spring 4 (72), a connecting plate 3 (73), an inclined block 3 (74), a return spring 5 (75), a limiting rod (76), a rotating sleeve (77), a rotating shaft (78) and a positioning rod (79), wherein the inclined block 2 (71) is attached to the outer wall of the fixing plate 1 (53), the outer wall of the inclined block 2 (71) is fixedly connected to the return spring 4 (72), the end of the return spring 4 (72) is fixedly connected to the outer wall of the connecting plate 3 (73), the connecting plate 3 (73) is slidably connected to the inclined block 3 (74), the outer wall of the inclined block 3 (74) is fixedly connected to the return spring 5 (75), and the outer wall of the inclined block 3 (74) is fixedly connected to the limiting rod (76).

8. The sawing machine for producing optical molds with a positioning structure according to claim 7, characterized in that: The rotating sleeve (77) is rotatably mounted on the outer wall of the connecting plate three (73). A rotating groove is provided on the rotating sleeve (77). The outer wall of the limiting rod (76) fits into the rotating groove on the rotating sleeve (77). The inner wall of the rotating sleeve (77) is fixedly connected to a rotating shaft (78). The outer wall of the bottom of the rotating shaft (78) is fixedly connected to a positioning rod (79).

9. A method for producing an optical mold, based on the sawing machine for producing an optical mold with a positioning structure according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. When the workpiece (8) needs to be cut, the workpiece 8 is placed above the support plate (4), the cylinder (51) is started, and the fixed rod (52) at the output end of the cylinder (51) moves toward the workpiece (8), and the workpiece (8) is clamped by the second fixed plate (54), and the two sides of the workpiece (8) are fixed at this time; S2, when the fixed plate 2 (54) moves toward the fixed plate 1 (53), the slider (64) will be driven to move toward the push rod (62). At this time, the slider (64) is squeezed by the push rod (62) and moves toward the inclined block 1 (65) until it squeezes the inclined block 1 (65). When the inclined block 1 (65) is squeezed, the inclined block 1 (65) moves downward and drives the fixed plate 3 (66) fixed on its outer wall to move downward, driving the threaded rod (67) to move downward as well. The threaded rod (67) drives the anti-warping side plate (68) at its bottom to move downward until the anti-warping side plate (68) abuts against the workpiece (8), thereby completing the fixation of the upper two sides of the workpiece (8); S3. When the fixing plate 2 (54) moves toward the fixing plate 1 (53), the fixing plate 2 (54) squeezes the oblique block 2 (71), and through the cooperation of the connecting plate 3 (73), the oblique block 3 (74), the limiting rod (76), the rotating sleeve (77) and the rotating shaft (78), the positioning rod (79) fixed to the rotating shaft (78) rotates toward the workpiece (8), thereby completing the center positioning of the workpiece (8); S4. By starting the cutting device, the saw blade (3) starts to rotate and starts cutting the workpiece (8).

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