Automatic centering tool for rounding square sheet

Abstract

The utility model belongs to the technical field of centering auxiliary tools, and discloses an automatic centering tool for square piece rounding, the automatic centering tool is suitable for an edge grinding machine, the edge grinding machine is provided with symmetrically-arranged seat sleeves and clamping sleeves arranged at the ends of the seat sleeves, the centering tool comprises a supporting block, and the supporting block is provided with a containing part used for containing a square piece; the length of the containing part extends in the length direction of the supporting block, the containing part penetrates through the supporting block, positioning parts are arranged at the two ends of the supporting block in the length direction, and when the positioning parts located at the two ends of the supporting block make contact with the symmetrically-arranged seat sleeves respectively, the square pieces on the containing part and the clamping sleeve are coaxially arranged. According to the automatic centering tool, the square piece is positioned through the containing part, the through design of the containing part is matched with the positioning parts at the two ends of the supporting block, it is guaranteed that the square piece and the clamping sleeve are coaxially arranged after clamping, the situation that centering is not stable when the square piece is manually placed is avoided, the precision is higher, the efficiency is higher, the qualified rate of machined products is higher, and the production quality is improved.

Description

Technical Field

[0001] This application belongs to the field of centering auxiliary tooling technology, specifically an automatic centering tooling for rounding square pieces. Background Technology

[0002] In products using infrared optical crystals such as germanium, chalcogenide glass, zinc selenide, and selenium sulfide as lenses, edge grinding is an important process. Typically, centering edge grinding uses two clamping sleeves as fixtures to hold the lens, and then rotates it to bring the lens into contact with a rotating grinding wheel to grind the edge.

[0003] For lenses with concave and / or convex surfaces, there are many ways to center them. Typically, the end of the clamping sleeve is structurally optimized to match the shape of the concave and / or convex surfaces. For example, Chinese Patent CN202964342U discloses a centering edge grinding machine where the front end face of the rotating positioning rod matches the surface of the lens to be processed. Therefore, when the lens is clamped, the optical axis of the lens is aligned with the rotation axis of the rotating positioning rod. Starting the grinding wheel and rotating the positioning rod allows the lens to be processed, ensuring that the optical center of the lens is located at the center of the lens edge. Similarly, Chinese Patent CN111113195A discloses an optical centering edge grinding fixture for a plano-convex cylindrical mirror, which also optimizes the structure at the end of the clamping sleeve to achieve centering.

[0004] The above technical solutions are all structural improvements made to concave and / or convex lenses. However, for the case of grinding square lenses into circles, since both sides of the square lens are flat, the above technical solutions cannot center the square lens. The axis of the square lens and the axis of the clamping sleeve are difficult to keep in line. Therefore, a tooling to assist in centering the square lens is needed. Utility Model Content

[0005] The purpose of this application is to solve the above problems and provide an automatic centering fixture for grinding square pieces. This automatic centering fixture uses a placement part to position the square piece. The through-hole design of the placement part, together with the positioning parts at both ends of the support block, ensures that the square piece and the clamping sleeve are arranged coaxially after clamping. This solves the problem of unstable centering when manually placing the piece, resulting in higher accuracy, faster efficiency, and a higher product qualification rate after processing, thus improving production quality.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] An automatic centering fixture for rounding square pieces is applicable to an edge grinding machine. The edge grinding machine is provided with symmetrically arranged seat sleeves and clamping sleeves at the ends of the seat sleeves. The centering fixture includes a support block with a placement part for placing the square piece. The length of the placement part extends along the length direction of the support block and passes through the support block. Positioning parts are provided at both ends along the length direction of the support block. When the positioning parts at both ends of the support block contact the symmetrically arranged seat sleeves, the square piece on the placement part is coaxially arranged with the clamping sleeve.

[0008] Preferably, the placement part has an L-shaped structure and includes a first positioning wall and a second positioning wall that are perpendicular to each other. The square piece located in the placement part has two adjacent sides on its edge that contact the first positioning wall and the second positioning wall respectively.

[0009] Preferably, the support block has an L-shaped structure.

[0010] Preferably, the width of the first positioning wall is the same as the width of the second positioning wall, and the width of the first positioning wall is greater than the width of the square.

[0011] Preferably, a clearance groove is provided at the connection between the first positioning wall and the second positioning wall, and the vertical cross-section of the clearance groove is arc-shaped or U-shaped.

[0012] Preferably, the positioning part is an L-shaped positioning plate, and the support block is connected to the front side of the positioning plate and located in the middle of the positioning plate.

[0013] Preferably, the positioning plate and the support block are integrally formed, and the outer corners of the positioning plate are all chamfered.

[0014] Preferably, the support block is made of aluminum alloy.

[0015] Preferably, the length of the placement portion is 5 to 6 times the thickness of the square piece.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] This automatic centering fixture uses a placement section to position the square piece. The through-type design of the placement section, together with the positioning sections at both ends of the support block, ensures that the square piece and the clamping sleeve are arranged coaxially after clamping. This solves the problem of unstable centering when manually placing the square piece, resulting in higher accuracy, faster efficiency, and a higher product qualification rate, thus improving production quality. Attached Figure Description

[0018] Figure 1 This is a perspective view of the automatic centering fixture of Example 1;

[0019] Figure 2 This is the front view of the automatic centering fixture in Example 1;

[0020] Figure 3This is a side view of the automatic centering fixture of Embodiment 1;

[0021] Figure 4 This is an operational schematic diagram of the automatic centering fixture in Example 1;

[0022] The labels for each item are as follows:

[0023] Support block 1; Placement part 2; Positioning part 3; First positioning wall 11; Second positioning wall 12; Clearance groove 13; Horizontal part 31; Vertical part 32; Seat sleeve A; Clamping sleeve B; Square piece C; Chamfer D. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] Example 1

[0026] Before describing this embodiment, the edge grinding machine (not shown in the figure) is first described. The edge grinding machine has symmetrically arranged seat sleeves A and clamping sleeves B located at the ends of the seat sleeves A. The symmetrically arranged seat sleeves A can extend and retract horizontally, meaning that the seat sleeves A drive the clamping sleeves B to move closer together to clamp the workpiece between the clamping sleeves B. Alternatively, only one side of the seat sleeve A can move horizontally. The edge grinding machine also has a drive mechanism for driving the seat sleeves A to rotate. After the workpiece is clamped, the drive mechanism drives the workpiece to rotate. The drive mechanism can be a drive motor. The edge grinding machine also has a rotatable grinding wheel, which can be driven to rotate by the motor inside the edge grinding machine. The specific structure of the edge grinding machine is not limited in this embodiment. For details, please refer to Chinese Patent CN204913527U, which discloses a lens centering edge grinding machine. This application is only applicable to the auxiliary centering fixture of that edge grinding machine.

[0027] refer to Figures 1-4 An automatic centering fixture for rounding square pieces is provided, applicable to an edge grinding machine. The edge grinding machine is provided with symmetrically arranged seat sleeves A and clamping sleeves B located at the ends of the seat sleeves A. The centering fixture includes a support block 1, on which a placement part 2 for placing square pieces C is provided. The length of the placement part 2 extends along the length direction of the support block 1 and passes through the support block 1. Positioning parts 3 are provided at both ends along the length direction of the support block 1. When the positioning parts 3 located at both ends of the support block 1 are in contact with the symmetrically arranged seat sleeves A, the square pieces C on the placement part 2 are coaxially arranged with the clamping sleeves B.

[0028] In this design, the operator holds the centering fixture, places the square piece C on the placement part 2, and moves the support block 1 with the square piece C to the vicinity of the seat sleeve A of the edge grinding machine. The operator then operates the edge grinding machine to ensure that the distance between the clamping sleeves B is sufficient to accommodate the square piece C, and that the positioning part 3 can contact the seat sleeve A. Subsequently, the positioning parts 3 at both ends of the placement part 2 simultaneously contact the seat sleeve A. At this time, the square piece C is located between the symmetrically arranged clamping sleeves B. Through the positioning of the positioning parts 3, the axis of the square piece C is made to coincide with the axis of the clamping sleeve B. Finally, by driving the seat sleeve A to move, the clamping sleeves B clamp the square piece C, thus completing the centering and fixing.

[0029] The cross-section of the placement part 2 can be a U-shaped structure that matches the square piece C, or it can be an L-shaped structure.

[0030] In this embodiment, the placement part 2 has an L-shaped structure and includes a first positioning wall 11 and a second positioning wall 12 that are perpendicular to each other. The square piece C located in the placement part 2 has two adjacent sides on its edge that are in contact with the first positioning wall 11 and the second positioning wall 12, respectively.

[0031] Specifically, the L-shaped placement part 2 not only facilitates the insertion of the square piece C, but also, compared to the U-shaped structure, which requires a complete match with the square piece C, the L-shaped structure only needs its first positioning wall 11 and second positioning wall 12 to match the two adjacent sides on the edge of the square piece C, thus reducing the contact surface with the square piece C.

[0032] More preferably, during the process of placing the square C and moving the support block 1 with the square C to the clamping sleeve B, the support block 1 is preferably positioned with the placement part 2 facing upwards, that is, the placement part 2 is in a V-shape, so that the square C can be placed in the placement part 2 by its own weight.

[0033] In this embodiment, the support block 1 has an L-shaped structure. In actual use, because the operating space inside the grinding machine is limited, if the whole structure is a cuboid and a placement part 2 is opened on its top, the overall volume will be too large. During the process of moving to the seat A, it is easy to come into contact with other parts such as the grinding wheel. Therefore, designing the support block 1 as an L-shaped structure can reduce its unnecessary parts and reduce its external volume.

[0034] In a preferred embodiment, the width of the first positioning wall 11 is the same as the width of the second positioning wall 12, and the width of the first positioning wall 11 is greater than the width of the square C. The fact that the width of the first positioning wall 11 is greater than the width of the square C ensures that the edge of the square C is completely located within the placement part 2, preventing unnecessary contact during movement and thus protecting the square C.

[0035] In this embodiment, a clearance groove 13 is provided at the connection between the first positioning wall 11 and the second positioning wall 12. The vertical cross-section of the clearance groove 13 is arc-shaped or U-shaped. Specifically, the clearance groove 13 is mainly used to protect the corner of the square piece C, because the corner of the square piece C is a vulnerable part. By setting the clearance groove 13, the connection between the first positioning wall 11 and the second positioning wall 12 can be prevented from contacting the corner of the square piece C, so that the corner of the square piece C is suspended.

[0036] In a preferred embodiment, the positioning part 3 is an L-shaped positioning plate, and the support block 1 is connected to the front side of the positioning plate and located in the middle of the positioning plate. During positioning, the horizontal part 31 and the vertical part 32 of the positioning plate simultaneously contact the seat sleeve A. This contact is a line contact, which can be understood as the horizontal part 31 and the vertical part 32 of the positioning plate being tangents of a circle.

[0037] In other embodiments, the positioning plate may be two pieces, which are respectively connected to both ends of the support block 1 along its length direction, and also extend from both ends of the support block 1 along its length direction.

[0038] In other embodiments, the positioning part 3 can also be a rod, specifically, symmetrically arranged rods are provided at both ends of the support block 1 along its length direction, that is, there are two rods at one end of the support block 1, and the distance between the two rods is less than the diameter of the seat sleeve A, so as to ensure that the two rods at one end of the support block 1 can contact the seat sleeve A at the same time. When the rods at both ends of the support block 1 contact the seat sleeve A corresponding to their positions at the same time, the axis of the square piece C can also be made to coincide with the axis of the clamping sleeve B.

[0039] In other embodiments, the positioning part 3 may also be an arc-shaped plate that matches the seat cover A, and the centering of the square piece C is achieved by the arc-shaped plate fitting against the side wall of the seat cover A.

[0040] This embodiment is based on the L-shaped structure of the support block 1, so the first method is adopted. This method can make the L-shaped support block 1 and the L-shaped positioning plate fit together completely, and the overall integrity of the tooling is stronger.

[0041] In this embodiment, the positioning plate and the support block 1 are integrally formed, and the outer corners of the positioning plate are all provided with chamfers D. Specifically, the integral forming eliminates the splicing structure, reduces material waste, and provides higher strength and better durability. The chamfers D at the outer corners of the positioning plate provide a better grip and improve safety.

[0042] Preferably, the support block 1 is made of aluminum alloy. Aluminum alloy is lightweight and easy to extrude, forge, stamp, cut and surface treat.

[0043] Optionally, the length of the placement part 2 is 5 to 6 times the thickness of the square piece C. In actual use, multiple square pieces C of the same size can be placed on the placement part 2. After being clamped by the clamping sleeve B, the square pieces C can rotate synchronously through friction under the drive of the seat sleeve A, so as to perform rounding operation on multiple square pieces C at the same time.

[0044] refer to Figure 1 In this embodiment, the length direction of the support block 1 is X-axis, and the front side is the side facing Y-axis.

[0045] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An automatic centering fixture for rounding square pieces, suitable for an edge grinding machine, wherein the edge grinding machine is provided with symmetrically arranged seat sleeves and clamping sleeves disposed at the ends of the seat sleeves, the centering fixture includes a support block, the support block being provided with a placement portion for placing the square piece, the length of the placement portion extending along the length direction of the support block and penetrating the support block, characterized in that, Positioning parts are provided at both ends along the length of the support block. When the positioning parts at both ends of the support block contact the symmetrically arranged seat sleeves, the square pieces on the placement part are arranged coaxially with the clamping sleeve.

2. The automatic centering fixture for rounding square pieces according to claim 1, characterized in that, The placement part has an L-shaped structure and includes a first positioning wall and a second positioning wall that are perpendicular to each other. The square piece located in the placement part has two adjacent sides on its edge that contact the first positioning wall and the second positioning wall, respectively.

3. The automatic centering fixture for rounding square pieces according to claim 2, characterized in that, The support block has an L-shaped structure.

4. The automatic centering fixture for rounding square pieces according to claim 2, characterized in that, The width of the first positioning wall is the same as the width of the second positioning wall, and the width of the first positioning wall is greater than the width of the square.

5. The automatic centering fixture for rounding square pieces according to claim 2, characterized in that, An anti-cavity groove is provided at the connection between the first positioning wall and the second positioning wall, and the vertical cross-section of the anti-cavity groove is arc-shaped or U-shaped.

6. The automatic centering fixture for rounding square pieces according to claim 1, characterized in that, The positioning part is an L-shaped positioning plate, and the support block is connected to the front side of the positioning plate and located in the middle of the positioning plate.

7. The automatic centering fixture for rounding square pieces according to claim 6, characterized in that, The positioning plate and the support block are integrally formed, and the outer corners of the positioning plate are all chamfered.

8. The automatic centering fixture for rounding square pieces according to claim 1, characterized in that, The support block is made of aluminum alloy.

9. The automatic centering fixture for rounding square pieces according to claim 1, characterized in that, The length of the placement portion is 5 to 6 times the thickness of the square piece.

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