Engraving fixture and surface engraving method for precision thin-walled lens barrel

Abstract

The present application belongs to the technical field of engraving fixture manufacturing, and specifically provides a fixture and a surface engraving method for a precision thin-walled lens barrel, comprising a main clamp and an auxiliary clamp, wherein one end of the main clamp is provided with a clamping portion with a circular cross-section, and the other end is a clamping seat, and the auxiliary clamp is a cylindrical shape with two ends opened, and the auxiliary clamp is made of hard rubber, and the inner diameter of the auxiliary clamp is larger than the outer diameter of the clamping portion, and a locking device for locking the auxiliary clamp is provided on the main clamp, thereby solving the problem that ordinary engraving fixtures cannot clamp precision thin-walled lens barrels for engraving operations.

Description

Technical Field

[0001] The present application belongs to the technical field of engraving fixture manufacturing, and specifically relates to a fixture and a surface engraving method for a precision thin-walled lens barrel. Background Art

[0002] The use of general engraving fixtures requires that the clamped object (product) has a certain hardness, and the object cannot be damaged after being clamped, and the object can be fixed during engraving, so as to meet the requirements of the engraving fixture. However, the surface of products with low hardness also needs to be engraved, such as the surface of precision thin-walled lens barrels. When ordinary fixtures clamp precision thin-walled lens barrels, the precision thin-walled lens barrels are very thin, so they are easily flattened by the fixtures, resulting in the destruction of the precision thin-walled lens barrels. Therefore, due to technical limitations, even if the surface of the precision thin-walled lens barrel needs to be engraved, it is not carried out. The reason is that there is no fixture suitable for precision thin-walled lens barrels. Summary of the invention

[0003] The purpose of this application is to address the shortcomings of the prior art. By adopting a cylindrical rigid clamping part and a cylindrical auxiliary clamp made of hard rubber in cooperation with each other, a clamp and a surface engraving method for a precision thin-walled lens barrel are designed, which can fix the precision thin-walled lens barrel without damaging the precision thin-walled lens barrel for engraving by an engraving machine, thereby solving the problem that ordinary engraving clamps cannot clamp the precision thin-walled lens barrel for engraving operations.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A clamp comprises a main clamp and an auxiliary clamp, wherein one end of the main clamp is provided with a clamping portion with a circular cross section, and the other end is a clamping seat, the auxiliary clamp is a cylinder with two ends open, the auxiliary clamp is made of hard rubber, the inner diameter of the auxiliary clamp is larger than the outer diameter of the clamping portion, and the main clamp is provided with a locking device for locking the auxiliary clamp.

[0006] Preferably, the main clamp is made of T7 steel.

[0007] Preferably, the diameter of the clamping seat is larger than the diameter of the auxiliary clamp.

[0008] Preferably, the locking device is arranged on the clamping seat.

[0009] Preferably, the locking device includes a first threaded hole, the first threaded hole is provided on the clamping seat away from the clamping portion, the diameter of the first threaded hole is smaller than the thickness of the sub-clamp, the axis of the first threaded hole is parallel to the axis of the clamping portion, and the distance between the axis of the first threaded hole and the axis of the clamping portion is between the inner diameter and the outer diameter of the sub-clamp.

[0010] Preferably, the locking device further includes a first engaging plate and a second threaded hole. The second threaded hole axially penetrates through the main clamp and the clamping portion. The first engaging plate is provided with a third threaded hole that cooperates with the second threaded hole. The shape and size of the first engaging plate are larger than the shape and size of the outer cross-section of the sub-clamp.

[0011] Preferably, the locking device includes a second engaging plate. A blind hole is coaxially provided at one end of the clamping portion facing away from the clamping seat. The second engaging plate is provided with a positioning shaft that cooperates with the blind hole. The second engaging plate is provided with a fourth threaded hole. The distance between the axis of the fourth threaded hole and the axis of the clamping portion is smaller than the diameter of the clamping portion. The clamping portion is provided with a fifth threaded hole that cooperates with the fourth threaded hole.

[0012] Preferably, the length of the clamping portion is greater than the length of the sub-clamp. The locking device includes a third engaging plate, a protrusion, and a locking bolt. The third engaging plate is provided with a through hole that cooperates with the clamping portion. The protrusions are evenly distributed around the through hole on one side of the third engaging plate. The locking bolt penetrates through the protrusion. The axis of the locking bolt is perpendicular to the axis of the through hole.

[0013] A method for surface engraving of a precision thin-walled lens barrel includes the following steps:

[0014] 1) Sleeving the precision thin-walled lens barrel on the clamping portion;

[0015] 2) Sleeving the sub-clamp on the precision thin-walled lens barrel in step 1;

[0016] 3) Locking the clamping portion, the sub-clamp, and the end of the precision thin-walled lens barrel in step 2 together through the locking device;

[0017] 4) Fixing the whole locked together in step 3 on a engraving machine, and importing a tool path program into the engraving machine, so that the tool of the engraving machine can engrave the outer surface of the whole combined in step 3;

[0018] 5) Adjusting the length of the engraving tool so that the depth of engraving on the outer surface of the whole combined in step 3 is H, and the thickness of the sub-clamp < H < the sum of the thickness of the sub-clamp and the thickness of the product between the sub-clamp and the clamping portion;

[0019] 6) Start the engraving machine.

[0020] Compared with the prior art, the beneficial effects of this application are:

[0021] 1. The present application adopts a cylindrical rigid clamping part and a cylindrical auxiliary clamp made of hard rubber to cooperate with each other, and designs a clamp and a surface engraving method for a precision thin-walled lens barrel, which can fix the precision thin-walled lens barrel without damaging the precision thin-walled lens barrel for engraving by an engraving machine, thereby solving the problem that ordinary engraving clamps cannot clamp the precision thin-walled lens barrel for engraving operations.

[0022] 2. The diameter of the clamping seat in the present application is larger than the diameter of the auxiliary clamp, so that the auxiliary clamp can limit the axial position of the precision thin-walled lens barrel in the clamping part.

[0023] 3. In the present application, the screw passes through the first threaded hole and then is screwed into the end face of the auxiliary clamp, which can limit the relative position relationship between the auxiliary clamp and the main clamp, thereby achieving the purpose of clamping a precision thin-walled lens barrel.

[0024] 4. The present application fixes the main clamp and the auxiliary clamp by friction generated by the contact between the locking bolt and the circumferential surface of the clamping part; and the length of the clamping part is greater than the length of the auxiliary clamp, so that the use range of the clamp itself is expanded, and the distance between the third clamping plate and the clamping seat can be adjusted according to the length of the precision thin-walled lens barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present application after clamping the precision thin-walled lens barrel;

[0026] Figure 2 for Figure 1 Exploded diagram of

[0027] Figure 3 An exploded view of the second embodiment of the present application;

[0028] Figure 4 This is an exploded view of the third embodiment of the present application;

[0029] Figure 5 This is an exploded view of the fourth embodiment of the present application.

[0030] Among them: 1. Clamping part; 2. Clamping seat; 3. Auxiliary clamp; 4. First threaded hole; 5. First clamping plate; 6. Second threaded hole; 7. Third threaded hole; 8. Second clamping plate; 9. Blind hole; 10. Positioning shaft; 11. Fourth threaded hole; 12. Fifth threaded hole; 13. Third clamping plate; 14. Protrusion; 15. Locking bolt; 16. Through hole; 17. Precision thin-walled lens barrel. Specific embodiments

[0031] See Figure 1-4 , a fixture, including a main gripper and a sub-gripper 3. One end of the main gripper is provided with a clamping portion 1 having a circular cross-section, and the other end is a clamping seat 2. The sub-gripper 3 is a cylindrical shape with openings at both ends. The sub-gripper 3 is made of hard rubber. The inner diameter of the sub-gripper 3 is larger than the outer diameter of the clamping portion 1. A locking device for locking the sub-gripper 3 is provided on the main gripper.

[0032] In this embodiment, during use, the diameter of the clamping portion 1 is made equal to the inner diameter of the precision thin-walled lens barrel 17, and the inner diameter of the sub-gripper 3 is made equal to the outer diameter of the precision thin-walled lens barrel 17. Then, the precision thin-walled lens barrel 17 is sleeved on the clamping portion 1, and then the sub-gripper 3 is sleeved on the precision thin-walled lens barrel 17 that has been sleeved on the clamping portion 1. Finally, the sub-gripper 3 and the main gripper are relatively fixed by the locking device. Since the sub-gripper 3 is made of hard rubber, the cutter of the engraving machine can directly engrave the surface of the sub-gripper 3. After that, the tool path program is imported into the engraving machine, so that the cutter of the engraving machine can engrave the outer surface of the overall combination of the clamping portion 1, the sub-gripper 3, and the precision thin-walled lens barrel 17. Then, the length of the engraving cutter is adjusted so that the engraving depth of the outer surface of the overall combination of the clamping portion 1, the sub-gripper 3, and the precision thin-walled lens barrel 17 is H, and the thickness of the sub-gripper 3 < H < the sum of the thickness of the sub-gripper 3 and the thickness of the precision thin-walled lens barrel 17 located between the sub-gripper 3 and the clamping portion 1. Finally, start the engraving machine to engrave. After that, the engraving of the same type of precision thin-walled lens barrel 17 can be clamped using this one fixture because the requirements for the same type of precision thin-walled lens barrel 17 (the size of the precision thin-walled lens barrel 17 and the pattern to be engraved) are the same. That is to say, the sub-gripper 3 after being engraved by the engraving machine can still be reused as long as it is not continuously broken into two sections in the axial direction of the sub-gripper 3.

[0033] As a preferred method, the main gripper is made of T7 steel.

[0034] Preferably, the diameter of the clamping seat 2 is larger than the diameter of the sub-gripper 3. The purpose of this setting is to enable the sub-gripper 3 to limit the axial position of the precision thin-walled lens barrel 17 on the clamping portion 1.

[0035] Preferably, the locking device is arranged on the clamping seat 2, so that the arrangement of the locking device will not affect the sleeving of the precision thin-walled lens barrel 17 on the clamping portion 1.

[0036] Preferably, as Figure 1 and Figure 2As shown, the locking device includes a first threaded hole 4, and the first threaded hole 4 is arranged on the clamping seat 2 away from the clamping part 1, the diameter of the first threaded hole 4 is smaller than the thickness of the auxiliary clamp 3, the axis of the first threaded hole 4 is parallel to the axis of the clamping part 1, and the distance between the axis of the first threaded hole 4 and the axis of the clamping part 1 is between the inner diameter and the outer diameter of the auxiliary clamp 3. After such arrangement, when in use, the screw can be passed through the first threaded hole 4 and then screwed into the end surface of the auxiliary clamp 3, so that the relative position relationship between the auxiliary clamp 3 and the main clamp is limited, thereby achieving the purpose of clamping the precision thin-walled lens barrel 17.

[0037] Preferably, Figure 3 As shown, the locking device also includes a first clamping plate 5 and a second threaded hole 6, wherein the second threaded hole 6 axially penetrates the main clamp and the clamping portion 1, and the first clamping plate 5 is provided with a third threaded hole 7 matched with the second threaded hole 6, and the shape and size of the first clamping plate 5 are larger than the shape and size of the outer cross section of the auxiliary clamp 3. After such arrangement, the axial position of the precision thin-walled lens barrel 17 on the clamping portion 1 can be limited by the clamping seat 2 and the first clamping plate 5. When in use, the first clamping plate 5, the precision thin-walled lens barrel 17, the auxiliary clamp 3, and the main clamp (composed of the clamping portion 1 and the clamping seat 2) can be assembled as a whole by continuously penetrating the second threaded hole 6 and the third threaded hole 7 through a bolt assembly, so that the precision thin-walled lens barrel 17 can be clamped without limiting the precision thin-walled lens barrel 17 from being engraved by the engraving machine.

[0038] Preferably, Figure 4 As shown, the locking device includes a second clamping plate 8, a blind hole 9 is coaxially provided on one end of the clamping portion 1 facing away from the clamping seat 2, a positioning shaft 10 is provided on the second clamping plate 8 to match the blind hole 9, a fourth threaded hole 11 is provided on the second clamping plate 8, the distance between the axis of the fourth threaded hole 11 and the axis of the clamping portion 1 is less than the diameter of the clamping portion 1, and a fifth threaded hole 12 is provided on the clamping portion 1 to match the fourth threaded hole 11. In this way, by setting the blind hole 9 and the positioning shaft 10, it is convenient to make the second clamping plate 8 coaxial with the clamping portion 1, so that the entire fixture is beautiful, and it is convenient to place the fixture holding the precision thin-walled lens barrel 17 on the engraving machine for engraving. Among them, after the bolts are screwed into the fourth threaded hole 11 and the fifth threaded hole 12 in sequence, the fixture holding the precision thin-walled lens barrel 17 can be fixed and locked, thereby playing the role of clamping the precision thin-walled lens barrel 17.

[0039] Preferably, Figure 5As shown, the length of the clamping portion 1 is greater than the length of the sub - clamp 3. The locking device includes a third engaging plate 13, a protrusion 14, and a locking bolt 15. The third engaging plate 13 is provided with a through - hole 16 that cooperates with the clamping portion 1. On one side of the third engaging plate 13, the protrusions 14 are evenly distributed around the through - hole 16. The locking bolt 15 penetrates through the protrusion 14, and the axis of the locking bolt 15 is perpendicular to the axis of the through - hole 16. In this embodiment, friction is generated between the locking bolt 15 and the circumferential surface of the clamping portion 1 to fix the main clamp and the sub - clamp 3. The setting that the length of the clamping portion 1 is greater than the length of the sub - clamp 3 expands the scope of use of the fixture itself, and the distance between the third engaging plate 13 and the clamping seat 2 can be adjusted according to the length of the precision thin - walled mirror tube 17.

[0040] A method for surface engraving of a precision thin - walled mirror tube includes the following steps:

[0041] 1)套设 the precision thin - walled mirror tube 17 on the clamping portion 1;

[0042] 2)套设 the sub - clamp 3 on the precision thin - walled mirror tube 17 in step 1;

[0043] 3)通过锁合装置将步骤2中的夹持部1、副夹持器3以及精密薄壁镜筒17的端部锁合在一起;

[0044] 4)将步骤3中锁合在一起的整体固定在雕刻机上,向雕刻机内导入刀路程序,使得雕刻机的刀能对步骤3中组合在一起的整体的外表面进行雕刻;

[0045] 5)调整雕刻的刀的长度,使得步骤3中组合在一起的整体的外表面雕刻的深度为H,副夹持器3的厚度 < H < 副夹持器3的厚度与位于副夹持器3与夹持部1之间的精密薄壁镜筒17的厚度之和;这样设置之后,雕刻的过程中,副夹持器3和精密薄壁镜筒17都被雕刻了,这种设置方式能够尽量使得精密薄壁镜筒17被夹持的面积最大化,从而避免精密薄壁镜筒17被夹持的面积太小而产生局部压强,从而损坏精密薄壁镜筒17。

[0046] 6)启动雕刻机。 Note: In the translation of "套设", it is more appropriate to use "slip on" or "sheathe" in the context of mechanical assembly, but the original text seems to be using a more colloquial or non - standard expression. Here, for the sake of maintaining the integrity of the original text, the literal translation is retained. If possible, it is recommended to standardize the text expression in the original.

Claims

1. A clamp, comprising a main clamp and a secondary clamp (3), characterized in that: One end of the main clamp is provided with a clamping part (1) having a circular cross-section, and the other end is a clamping seat (2). The auxiliary clamp (3) is a cylindrical tube with openings at both ends. The auxiliary clamp (3) is made of hard rubber. The inner diameter of the auxiliary clamp (3) is larger than the outer diameter of the clamping part (1). A locking device for locking the auxiliary clamp (3) is provided on the main clamp. Since the auxiliary clamp (3) is made of hard rubber, the cutter of the engraving machine can directly engrave the surface of the auxiliary clamp (3). It also includes a method for engraving the surface of a precision thin-walled lens barrel, and the method for engraving the surface of the precision thin-walled lens barrel includes the following steps: 1) Sleeving the precision thin-walled lens barrel (17) on the clamping part (1); 2) Sleeving the auxiliary clamp (3) on the precision thin-walled lens barrel (17) in step 1; 3) Locking the clamping part (1), the auxiliary clamp (3), and the end of the precision thin-walled lens barrel (17) in step 2 together through the locking device; 4) Fixing the whole locked together in step 3 on the engraving machine, importing a tool path program into the engraving machine, so that the cutter of the engraving machine can engrave the outer surface of the whole combined in step 3; 5) Adjusting the length of the engraving cutter so that the engraving depth on the outer surface of the whole combined in step 3 is H, and the thickness of the auxiliary clamp (3) < H < the sum of the thickness of the auxiliary clamp (3) and the thickness of the precision thin-walled lens barrel (17) located between the auxiliary clamp (3) and the clamping part (1); 6) Starting the engraving machine.

2. A clamp according to claim 1, characterized in that: The main clamp is made of T7 steel.

3. A clamp according to claim 1, characterized in that: The diameter of the clamping seat (2) is larger than the diameter of the auxiliary clamp (3).

4. A clamp according to claim 3, characterized in that: The locking device is arranged on the clamping seat (2).

5. A clamp according to claim 4, characterized in that: The locking device includes a first threaded hole (4). The first threaded hole (4) is arranged on the clamping seat (2) away from the clamping part (1). The diameter of the first threaded hole (4) is smaller than the thickness of the auxiliary clamp (3). The axis of the first threaded hole (4) is parallel to the axis of the clamping part (1). The distance between the axis of the first threaded hole (4) and the axis of the clamping part (1) is between the inner diameter and the outer diameter of the auxiliary clamp (3).

6. A clamp according to claim 5, characterized in that: The locking device further includes a first clamping plate (5) and a second threaded hole (6). The second threaded hole (6) axially penetrates the main clamp and the clamping part (1). The first clamping plate (5) is provided with a third threaded hole (7) matching the second threaded hole (6). The shape and size of the first clamping plate (5) are larger than the shape and size of the outer cross-section of the auxiliary clamp (3).

7. A clamp according to claim 5, characterized in that: The locking device comprises a second clamping plate (8), a blind hole (9) is coaxially provided on one end of the clamping portion (1) facing away from the clamping seat (2), a positioning shaft (10) is provided on the second clamping plate (8) and cooperates with the blind hole (9), a fourth threaded hole (11) is provided on the second clamping plate (8), the distance between the axis of the fourth threaded hole (11) and the axis of the clamping portion (1) is less than the diameter of the clamping portion (1), and a fifth threaded hole (12) is provided on the clamping portion (1) and cooperates with the fourth threaded hole (11).

8. A clamp according to claim 3, characterized in that: The length of the clamping portion (1) is greater than the length of the auxiliary clamp (3); the locking device comprises a third clamping plate (13), a protrusion (14), and a locking bolt (15); the third clamping plate (13) is provided with a through hole (16) that matches the clamping portion (1); one side of the third clamping plate (13) is provided with the protrusions (14) evenly distributed around the through hole (16); the locking bolt (15) is penetrated by the protrusion (14); the axis of the locking bolt (15) is perpendicular to the axis of the through hole (16).

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