A Z-axis structure

Abstract

The present invention discloses a Z-axis structure, which relates to the field of lens grinding and processing. The Z-axis structure comprises: a first substrate (1); a second substrate (2) installed on the first substrate and capable of moving relative to the first substrate along the Z-axis direction; a linear motion mechanism (6) installed on the second substrate and capable of moving relative to the second substrate along the Z-axis direction; a pin (4) installed at the front end of the linear motion mechanism; a fixture (3) suspended at the front end of the pin; a positioning member (5) provided on the linear motion mechanism and used to accommodate and position the fixture when the fixture is pulled up; an air path mechanism (7); a first power mechanism (8) for driving the linear motion mechanism; and a second power mechanism (9) for driving the second substrate to move. The Z-axis structure integrates the pin, the fixture, the fixture positioning member, the air path mechanism and the power mechanism, and can improve the efficiency and yield rate of lens grinding and processing.

Description

Technical Field

[0001] The invention relates to the field of lens grinding and processing, and in particular to a Z-axis structure of a lens grinding device. Background Art

[0002] In today's context of rapidly growing labor costs and rapid development of the optical industry, processing yield and efficiency have become powerful competitive indicators in the field of lens finishing.

[0003] At present, the concave lens grinding process adopts the manual material loading and unloading method. First, the material is placed in the fixture, and then the fixture and the material are placed in the grinding station. The ejector pin is lifted and then pressed down to the fixture. This action requires manual operation with both hands and high concentration, and the action is also very cumbersome. All these lead to low yield and processing efficiency of lens grinding. Summary of the invention

[0004] The purpose of the present invention is to provide a Z-axis structure to solve the above-mentioned defects in the related art.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A Z-axis structure, comprising: a first substrate (1); a second substrate (2) mounted on the first substrate (1) and capable of moving relative to the first substrate (1) along the Z-axis direction; a linear motion mechanism (6) mounted on the second substrate (2) and capable of moving relative to the second substrate (2) along the Z-axis direction; a pin (4) mounted at the front end of the linear motion mechanism (6); a fixture (3) suspended at the front end of the pin (4); a positioning member (5) provided on the linear motion mechanism (6) and used for accommodating and positioning the fixture (3) when the fixture (3) is pulled up; an air path mechanism (7) connected to a lens accommodating cavity (32) of the fixture (3); a first power mechanism (8) for driving the linear motion mechanism (6); and a second power mechanism (9) for driving the second substrate (2) to move.

[0007] Preferably, the power input part of the linear motion mechanism (6) and the power output part of the first power mechanism (8) are connected via a floating joint (81).

[0008] Preferably, the air path mechanism (7) comprises: a first air channel (71) provided inside the clamp (3); a second air channel (72) provided inside the ejector pin (4); a third air channel (73) provided inside the linear motion mechanism (6); and an air path connector (74) provided on the linear motion mechanism (6).

[0009] Preferably, the first air channel (71) inside the clamp (3) includes: a first air hole (711) arranged at the center of the bottom of the lens accommodating cavity (32); a plurality of second air holes (713) arranged at the periphery of the needle groove (33); and a plurality of third air holes (712) arranged at the bottom of the needle groove (33) for connecting the first air hole (711) and the second air hole (713).

[0010] Preferably, the clamp (3) comprises: a first body (35) made of a first material and having the first air channel (71); and a rigid member (36) made of a second material and having a needle groove (33) fixed to the center of the back of the first body (35).

[0011] Preferably, the ejector pin (4) comprises: a second body (42) having the second air channel (72); and a needle tip (41) fixed to the front end of the second body (42); the second air channel (72) inside the ejector pin (4) has a plurality of outlets, and the plurality of outlets are evenly distributed on a circumference with the central axis of the ejector pin (4) as the center.

[0012] Preferably, a connecting cover (31) is provided on the back of the clamp (3), the inner end of the connecting cover (31) has an inner conical surface (34), the ejector pin (4) is provided with an outer conical surface (43) corresponding to the inner conical surface (34), and the outer conical surface (43) and the inner conical surface (34) cooperate to suspend the clamp (3) at the front end of the ejector pin (4).

[0013] Preferably, the linear motion mechanism (6) comprises: a sleeve (61) fixed to the second base body (2); and an inner rod (62) installed in the sleeve (61) and slidingly matched with the sleeve (61); a third air channel (73) is provided inside the inner rod (62).

[0014] Preferably, the second base (2) and the first base (1) are plates, and the two are parallel to each other; the second power mechanism (9) is installed on the side of the first base (1) away from the second base (2), and the power output part of the second power mechanism (9) is connected to the second base (2) through a support plate (91); the first power mechanism (8) is located on the side of the second base (2) away from the first base (1).

[0015] Preferably, the Z-axis structure further comprises: a first limit sensor for controlling the lifting end point of the second substrate; and a second limit sensor for controlling the lowering end point of the second substrate.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] The Z-axis structure integrates the ejector pin, the fixture, the fixture positioning member, the air path mechanism and the power mechanism, and can drive the ejector pin and the fixture to switch between the grinding state and the loading and unloading state, so as to realize the automatic loading and unloading and grinding of the lens, and improve the lens grinding processing efficiency and yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the Z-axis structure;

[0019] Figure 2 is its side view;

[0020] Figure 3 It is the combined structure diagram of the linear motion mechanism, positioning parts, ejector pins and fixtures;

[0021] Figure 4 It is a schematic diagram of the combination of the fixture and the ejector pin;

[0022] Figure 5 This is a state diagram of the positioning parts, ejector pins and fixtures in the grinding state;

[0023] Figure 6 This is a state diagram of the positioning parts, ejector pins and fixtures in the loading and unloading state;

[0024] Figure 7 is a structural schematic diagram of an embodiment of an ejector pin;

[0025] Figure 8 is a structural schematic diagram of another embodiment of the ejector pin;

[0026] Fig. 9 is a structural schematic diagram of an embodiment of a clamp;

[0027] Fig.10 is a schematic diagram of the structure of the airway in the fixture;

[0028] Reference numerals:

[0029] 1. A first substrate;

[0030] 2. The second substrate;

[0031] 3. Fixture;

[0032] 31. Connecting cover; 32. Lens accommodating cavity; 33. Needle groove; 34. Inner cone surface; 35. First body; 36. Rigid member;

[0033] 4. ejector pin; 41. needle tip; 42. second body; 43. outer cone surface;

[0034] 5. Positioning parts;

[0035] 6. Linear motion mechanism;

[0036] 61. sleeve; 62. inner rod;

[0037] 7. Gas circuit mechanism;

[0038] 71, first air channel; 72, second air channel; 73, third air channel; 74, air channel connector; 711, first air hole; 712, third air hole; 713, second air hole;

[0039] 8. The first power mechanism;

[0040] 81. Floating joint;

[0041] 9. Second power mechanism;

[0042] 91. Pallet. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0044] Please refer to Figure 1-10 The Z-axis structure includes: a first substrate 1, a second substrate 2, a linear motion mechanism 6, a pin 4, a fixture 3, a positioning member 5, an air path mechanism 7, a first power mechanism 8 and a second power mechanism 9.

[0045] The first substrate 1 and the second substrate 2 are specifically plate bodies, which are arranged parallel to each other and are combined together by a linear guide mechanism composed of a slider and a slide rail, so that the second substrate 2 can be moved along the Z-axis direction, that is, Figure 2 In the up and down directions, it moves relative to the first substrate 1.

[0046] The linear motion mechanism 6 is mounted on the second substrate 2 and can move along the Z-axis direction, i.e. Figure 2 In the up and down direction, it moves relative to the second substrate 2. Figure 1 , Figure 3 The linear motion mechanism 6 specifically includes a sleeve 61 and an inner rod 62 . The sleeve 61 is fixedly mounted on the second base body 2 . The inner rod 62 is slidably matched with the sleeve 61 . A third air passage 73 is also provided inside the inner rod 62 .

[0047] Reference Figure 3 The ejector pin 4 is screwed to the front end of the inner rod 62 , and a second air passage 72 is also provided inside the ejector pin 4 .

[0048] Reference Figure 3 , Figure 4, the fixture 3 is suspended at the front end of the ejector pin 4. In this embodiment, the fixture 3 is suspended at the front end of the ejector pin 4 through a connecting cover 31. Specifically, the front end of the connecting cover 31 is tightly matched with the back of the fixture 3, and the inner end of the connecting cover 31 has an inner conical surface 34. The ejector pin 4 is provided with an outer conical surface 43 corresponding to the inner conical surface 34. The outer conical surface 43 cooperates with the inner conical surface 34 to suspend the fixture 3 at the front end of the ejector pin 4. A first air passage 71 is also provided inside the fixture 3.

[0049] Combination Figure 3 , Figure 4 , Figure 5 , Figure 6 The positioning member 5 is fixedly mounted on the front end of the sleeve 61 of the linear motion mechanism 6. When the clamp 3 is pulled up by the ejector pin 4, the connecting cover 31 enters the positioning member 5 (see Figure 6 ), thereby keeping the fixture 3 at the current position. The inner conical surface 34 of the connection cover 31 cooperates with the outer conical surface 43 on the ejector pin 4, which also ensures that the connection cover 31 can smoothly enter the positioning member 5 during the positioning process, and has better reliability.

[0050] Combination Figure 1 , Figure 3 , Figure 4 The first air channel 71, the second air channel 72 and the third air channel 73 constitute the air path mechanism 7, which is used to introduce negative air pressure into the lens accommodating chamber 32 on the fixture 3 when the fixture 3 picks up the lens (i.e., loading), and to introduce positive air pressure into the lens accommodating chamber 32 on the fixture 3 when the fixture 3 releases the lens (i.e., unloading). An air path connector 74 is also provided on the linear motion mechanism 6, which is used for the first air channel 71 to connect to an external air source. In the air path mechanism 7, the difficulty of supplying air to the floating fixture 3 (suspended at the front end of the ejector 4) is effectively solved through the built-in air channel of the ejector pin 4, the built-in air channel of the fixture 3 and the built-in air channel of the linear motion mechanism 6. The inner conical surface 34 of the connecting cover 31 and the outer conical surface 43 on the ejector pin 4 cooperate to seal the air channels.

[0051] Reference Figure 1 , Figure 2 The first power mechanism 8 is installed on the second base 2, and its power output part is connected to the power input part of the linear motion mechanism 6, that is, connected to the end of the inner rod 62 of the linear motion mechanism 6. In this embodiment, the first power mechanism 8 adopts a cylinder. Further, the power input part of the linear motion mechanism 6 and the power output part of the first power mechanism 8 are connected through a floating joint 81, which can reduce the driving resistance caused by processing errors or assembly errors and reduce related mechanical wear.

[0052] Reference Figure 1 , Figure 2The second power mechanism 9 is installed on the first base 1, and its power output part is connected to the second base 2 to drive the second base 2 to move as a whole relative to the first base 1. In this embodiment, the second power mechanism 9 is a cylinder.

[0053] The working process of this Z-axis structure is as follows:

[0054] When you need to pick up the lens, Figure 6 As shown, the first power mechanism 8 drives the ejector pin 4, and then pulls the clamp 3 to lift up. After the clamp 3 is lifted up, the connecting cover 31 on the back of the clamp 3 is embedded in the positioning member 5, and the positioning member 5 is kept at the current position without moving. Negative air pressure is introduced into the air path mechanism 7 to form suction in the lens receiving cavity 32 on the clamp 3, so that the lens is sucked in and held in the lens receiving cavity 32. Figure 6 The dashed lines in show the airflow paths.

[0055] After picking up the lens, the second power mechanism 9 drives the second base 2 to move, and drives the fixture 3, the ejector pin 4, the lens, etc. to move to the grinding head. Then, the first power mechanism 8 drives the ejector pin 4 to move downward, and the ejector pin 4 presses into the needle groove 33 on the back of the fixture 3, pressing the fixture 3 onto the grinding head. At this time, the fixture 3 is separated from the positioning member 5, and there is a certain gap between the inner cone surface 34 and the outer cone surface 43, and the fixture 3 can swing within a certain range, such as Figure 5 shown.

[0056] After the grinding is completed, positive air pressure is introduced into the air circuit mechanism 7 to form a blowing force in the lens receiving cavity 32 on the fixture 3 to blow the lens out and realize material unloading.

[0057] It can be seen that the Z-axis structure integrates the ejector pin 4, the fixture 3, the fixture positioning member 5, the air path mechanism 7 and the power mechanism, and can drive the ejector pin 4 and the fixture 3 to switch between the grinding state and the loading and unloading state, thereby realizing the automatic loading and unloading and grinding control of the lens. Compared with the existing manual loading and unloading, the Z-axis structure can improve the lens grinding efficiency and yield rate.

[0058] Fig.10 A preferred clamp 3 is shown. The first air channel 71 inside the clamp 3 includes: a first air hole 711 arranged at the center of the bottom of the lens accommodating cavity 32; a plurality of second air holes 713 arranged at the periphery of the needle groove 33; and a plurality of third air holes 712 arranged at the bottom of the needle groove 33 for connecting the first air hole 711 and the second air holes 713. The structure of the first air channel 71 keeps the air channel outlet at the center of the lens accommodating cavity 32 while avoiding the needle groove 33, so that it can be used for lenses with a diameter larger than the diameter of the needle groove 33, and lenses with a diameter smaller than the diameter of the needle groove 33. More preferably, all the third air holes 712 are evenly distributed on the circumference centered on the needle groove 33.

[0059] Reference Fig. 9 The fixture 3 is further composed of a first body 35 and a rigid member 36. The first body 35 is made of relatively cheap materials such as ordinary steel, and the rigid member 36 is made of tungsten steel, ceramic or other materials with good wear resistance. The first air channel 71 is arranged on the first body 35, and the needle groove 33 is arranged on the rigid member 36. The rigid member 36 is tightly mounted at the back center of the first body 35. The fixture 3 has the characteristics of low cost and easy processing of the air channel.

[0060] Figure 7 A preferred ejector pin 4 is shown. The ejector pin 4 comprises: a second body 42 having the second air passage; and a needle tip 41 fixed to the front end of the second body 42. That is, the ejector pin 4 adopts a combined structure, and the needle rod can be made of low-cost materials, while the needle tip 41 is made of highly wear-resistant materials, which can reduce costs and facilitate air passage processing. Moreover, when the needle tip 41 is worn, only the needle tip 41 can be replaced. In addition, the second air passage 72 inside the ejector pin 4 has a plurality of outlets, and the plurality of outlets are evenly distributed on a circumference with the central axis of the ejector pin 4 as the center.

[0061] Figure 8 Another ejector pin 4 is shown. The ejector pin 4 is formed by a needle rod and a needle tip 41 made of the same material in one piece. The outlets of the airway in the ejector pin 4 are distributed on opposite sides of the needle tip 41.

[0062] Further references Figure 2 In this embodiment, the second base 2 and the first base 1 are plates, which are parallel to each other; the second power mechanism 9 is installed on the side of the first base 1 away from the second base 2, and the power output part of the second power mechanism 9 is connected to the second base 2 through a support plate 91; the first power mechanism 8 is located on the side of the second base 2 away from the first base 1. This combination makes the Z-axis structure more compact and is conducive to miniaturization.

[0063] Furthermore, the Z-axis structure further includes a first limit sensor for controlling the lifting end point of the second base 2 ; and a second limit sensor for controlling the lowering end point of the second base 2 .

[0064] The Z-axis structure can be applied to various lens grinding equipment, especially to upper swing machines.

[0065] The present invention is described in detail above through specific embodiments, and these detailed descriptions are only limited to helping those skilled in the art understand the content of the present invention, and cannot be understood as limiting the scope of protection of the present invention. Various modifications, equivalent transformations, etc. made by those skilled in the art to the above scheme under the conception of the present invention should be included in the scope of protection of the present invention.

Claims

1. A Z-axis structure, characterized in that: include: A first substrate (1); a second substrate (2) mounted on the first substrate (1) and capable of moving relative to the first substrate (1) along a Z-axis direction; A linear motion mechanism (6) installed on the second base (2) and capable of moving relative to the second base (2) along the Z-axis direction, the linear motion mechanism (6) comprising: a sleeve (61) fixed to the second base (2), and an inner rod (62) installed in the sleeve (61) and slidingly matched with the sleeve (61); a third air passage (73) is provided inside the inner rod (62); A ejector pin (4) mounted at the front end of the linear motion mechanism (6), wherein the ejector pin (4) is provided with an outer conical surface (43); A clamp (3) is suspended at the front end of the ejector pin (4), a connecting cover (31) is provided on the back of the clamp (3), the inner end of the connecting cover (31) has an inner conical surface (34), the outer conical surface (43) cooperates with the inner conical surface (34), and the clamp (3) is suspended at the front end of the ejector pin (4); a positioning member (5) provided on the linear motion mechanism (6) and used for accommodating and positioning the clamp (3) when the clamp (3) is pulled up, wherein the positioning member (5) is fixedly mounted on the front end of a sleeve (61) of the linear motion mechanism (6); An air path mechanism (7) connected to the lens accommodating cavity (32) of the fixture (3); a first power mechanism (8) for driving the linear motion mechanism (6), the first power mechanism being mounted on the second base body, and a power output portion being connected to the end of an inner rod (62) of the linear motion mechanism (6); and A second power mechanism (9) for driving the second substrate (2) to move; The working process of the Z-axis structure includes: when it is necessary to pick up a lens, the first power mechanism (8) drives the ejector pin (4), thereby pulling the clamp (3) to lift up, and after the clamp (3) is lifted up, the connection cover (31) on the back of the clamp (3) is embedded in the positioning member (5), the positioning member (5) is kept at the current position, and negative air pressure is introduced into the air path mechanism (7), so that suction is formed in the lens receiving cavity on the clamp (3), and the lens is sucked in and held in the lens receiving cavity; After picking up the lens, the second power mechanism (9) drives the second base (2) to move, driving the clamp (3), the ejector pin (4) and the lens to move to the grinding head. Then, the first power mechanism (8) drives the ejector pin (4) to move downward. The ejector pin (4) is pressed into the needle groove on the back of the clamp (3), pressing the clamp (3) onto the grinding head. At this time, the clamp (3) is separated from the positioning member (5), and there is a certain gap between the inner conical surface (34) and the outer conical surface (43), so that the clamp (3) can swing within a certain range. After the grinding is completed, positive air pressure is introduced into the air path mechanism (7), thereby forming a blowing force in the lens accommodating cavity on the fixture (3), blowing the lens out, and realizing material unloading.

2. The Z-axis structure according to claim 1, characterized in that: The power input part of the linear motion mechanism (6) and the power output part of the first power mechanism (8) are connected via a floating joint (81).

3. The Z-axis structure according to claim 1, characterized in that: The gas path mechanism (7) comprises: A first air passage (71) disposed inside the clamp (3); a second air passage (72) disposed inside the ejector pin (4); a third air passage (73) disposed inside the linear motion mechanism (6); and An air path connector (74) is provided on the linear motion mechanism (6).

4. The Z-axis structure according to claim 3, characterized in that: The first air channel (71) inside the clamp (3) comprises: A first air hole (711) provided at the center of the bottom of the lens accommodating cavity (32); a plurality of second air holes (713) disposed on the outer periphery of the needle groove (33); and A plurality of third air holes (712) are provided at the bottom of the needle groove (33) and are used to connect the first air hole (711) and the second air hole (713).

5. The Z-axis structure according to claim 3, characterized in that: The clamp (3) comprises: A first body (35) made of a first material and having the first air channel (71); and A rigid member (36) made of a second material and having a needle groove (33) is fixedly mounted at the center of the back of the first body (35).

6. The Z-axis structure according to claim 3, characterized in that: The ejector pin (4) comprises: a second body (42) having the second air channel (72); and A needle tip (41) fixedly mounted on the front end of the second body (42); The second air passage (72) inside the ejector pin (4) has a plurality of outlets, and the plurality of outlets are evenly distributed on a circumference with the central axis of the ejector pin (4) as the center.

7. The Z-axis structure according to claim 1, characterized in that: The second base (2) and the first base (1) are plate bodies, and the two are parallel to each other; the second power mechanism (9) is installed on the side of the first base (1) away from the second base (2), and the power output part of the second power mechanism (9) is connected to the second base (2) through a supporting plate (91); the first power mechanism (8) is located on the side of the second base (2) away from the first base (1).

8. The Z-axis structure according to claim 1, characterized in that: The Z-axis structure also includes: A first limit sensor for controlling a lifting end point of the second substrate; and A second limit sensor for controlling the descending end point of the second substrate.

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