Positioning and fixing structure for metal part hanging tool and overturning table

Abstract

The utility model relates to the technical field of metal part machining equipment, in particular to a positioning and fixing structure for a metal part hanging tool and an overturning table. An overturning support is installed on the overturning table top, and an output shaft of the overturning motor is connected with a rotating shaft of the overturning support and drives the overturning support to rotate; the overturning support is provided with a supporting structure capable of supporting the overturning support. Positioning and fixing mechanisms are arranged at the two ends of the overturning support respectively, each positioning and fixing mechanism comprises a positioning air cylinder, the execution end of each positioning air cylinder is connected with a positioning cone, the hanging tool is provided with a positioning hole matched with the positioning cone, and the positioning air cylinders drive the positioning cones to be inserted into or separated from the positioning holes; the positioning hole is conical, the radius of an opening of the positioning hole is r, the vertical distance between the axis of the positioning hole and the supporting surface of the supporting structure is h, and the vertical distance between the axis of the positioning cone and the supporting surface of the supporting structure is H; and h + r > H > h. The hanger positioning structure can still keep high positioning precision after being used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of metal parts processing equipment, in particular to a metal parts hanger and a turning table positioning and fixing structure. Background Art

[0002] Anodizing is a common process used in the production of metal housings for digital 3C products. Before this process begins, individual semi-finished workpieces are temporarily mounted on a dedicated hanger. The hanger itself is equipped with specialized fixtures or metal clips to secure the workpieces. During the anodizing process, the workpiece and hanger are immersed in an oxidation tank.

[0003] When designing a hanger, to increase its utilization and the number of workpieces that can be accommodated in the anodizing tank, fixtures are usually installed on both sides of the hanger to accommodate the workpieces. Therefore, the hanger needs to be positioned and flipped when the workpiece is placed on it.

[0004] After long-term use, the positioning holes of existing hangers wear out and the flanges where the holes are located bend, which leads to inaccurate hanger positioning and ineffective workpiece fixation on the fixture. In severe cases, the workpiece may fall into the anodizing tank during anodizing operations. Utility Model Content

[0005] In order to solve the problem that the positioning method of the hanger on the turning table in the prior art is not accurate after long-term use, the utility model provides a metal parts hanger and the turning table positioning and fixing structure, wherein a turning bracket is installed on the turning table surface, and a rotating shaft is provided at the front and rear sections of the turning bracket. The rotating shaft is horizontally arranged and rotatably mounted on the rotating table surface, and a turning motor is also fixed on the turning table, and the output shaft of the turning motor is connected to the rotating shaft of the turning bracket and drives the turning bracket to rotate;

[0006] The middle portion of the flip bracket includes an embedding groove for arranging the hanger, and a supporting structure capable of supporting the flip bracket is provided at the edge of the bottom of the embedding groove;

[0007] The two ends of the flip bracket are respectively provided with a positioning and fixing mechanism, which includes a positioning cylinder fixedly mounted on the flip bracket, the axis of the positioning cylinder being parallel to the rotating shaft, the execution end of the positioning cylinder being connected to a positioning cone, the hanger being provided with a positioning hole that matches the positioning cone, the positioning cone pointing to the positioning hole, and the positioning cylinder driving the positioning cone to insert into or out of the positioning hole;

[0008] The positioning hole is conical, the radius of the positioning hole opening is r, the vertical distance between the axis of the positioning hole and the support surface of the support structure is h, the vertical distance between the axis of the positioning cone and the support surface of the support structure is H; and h+r>H>h.

[0009] In some embodiments, limiting holes are provided at the front and rear ends of the flip bracket, and a positioning rod is slidingly fitted in the positioning hole. One end of the positioning rod is connected to a positioning cylinder, and the other end is provided with a positioning cone.

[0010] In some embodiments, the positioning mechanism on the top of the flip bracket and the positioning and fixing mechanism on the bottom of the flip bracket are in the same straight line.

[0011] In some embodiments, the positioning and fixing mechanism includes four independent sets, and the four sets of fixing mechanisms are arranged at the four corners of the embedding groove of the flip bracket.

[0012] In some embodiments, the axes of the positioning cylinders of the four positioning and fixing mechanisms are in the same plane as the axis of the rotating shaft.

[0013] In some embodiments, the taper of the positioning cone is less than 45°, and the taper of the positioning cone is the same as that of the positioning hole.

[0014] In some embodiments, the hanger includes a frame, and a plurality of fixtures are respectively installed on the upper and lower surfaces of the frame for clamping the workpiece.

[0015] The frame includes two front and rear cross bars and a plurality of longitudinal beams connecting the front and rear cross bars. Any positioning cylinder corresponds to at least one longitudinal beam, and the longitudinal beam and the positioning cylinder are on the same axis.

[0016] In the prior art, several conical positioning cones are typically fixed to a flip bracket, with their tips facing upward, i.e., along the Z axis. Positioning plates are placed horizontally (in the X and Y directions) on the hanger, with positioning holes drilled into them. The hanger is then placed on the flip bracket by a robot, with the holes aligned with the positioning cones for accurate positioning. Other force-applying components then press the hanger downward along the Z axis.

[0017] This positioning method is simple and efficient, but after long-term use, the downward pressure on the bracket along the Z axis can cause wear in the positioning holes and deformation of the positioning plate, leading to inaccurate positioning. This can affect the subsequent installation and fixation of the workpiece and fixture, and some workpieces may not be properly installed.

[0018] The metal parts hanger and the turning table positioning and fixing structure using the above technical solution of the utility model has the following effects:

[0019] The utility model modifies the positioning method of the entire hanger, and utilizes a positioning mechanism arranged along the front-back direction (X direction) to achieve positioning and fixation in the three directions of X, Y, and Z.

[0020] During the specific operation, the flip bracket will first rotate to the front-facing position, and then the robot will place the hanger on the flip bracket. Therefore, in this application, a support structure is first set at the bottom edge of the embedded groove of the flip bracket for placing the hanger. The support structure is used to temporarily support the hanger to prevent it from falling.

[0021] The positioning mechanism on the flip bracket then cooperates with the positioning holes on the hanger to achieve positioning and fixation. Specifically, a positioning cylinder inserts the positioning cone into the positioning hole, ensuring that the axis of the positioning hole and the axis of the positioning cone are coaxial. At this point, because h + r > H > hr, the entire hanger will slightly lift upward from the support structure. The positioning cone and positioning hole cooperate to lock the hanger. Positioning and fixing mechanisms are also provided at both ends of the flip bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the utility model after it is fully installed;

[0023] Figure 2 This is a schematic diagram of the combination of the flip bracket and the hanging bracket of the utility model;

[0024] Figure 3 is a schematic diagram of a positioning and fixing mechanism;

[0025] Figure 4 is a side sectional view of the flip bracket and the hanger;

[0026] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0027] Description of Reference Numerals

[0028] 1- Turning table;

[0029] 2- flip bracket, 2a- support structure;

[0030] 3- Flip motor;

[0031] 4-positioning and fixing mechanism, 4a-positioning cylinder, 4b-positioning cone;

[0032] 5-hanging rack, 5a-frame, 5b-tooling fixture. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] The present invention provides a positioning and fixing structure for a metal parts hanger and a turning table 1. A turning bracket 2 is mounted on the turning table 1. Rotating shafts are provided at the front and rear ends of the turning bracket 2. The rotating shafts are horizontally arranged and rotatably mounted on the turning table 1. A turning motor 3 is also fixed to the turning table 1. The output shaft of the turning motor 3 is connected to the rotating shaft of the turning bracket 2, driving the turning bracket 2 to rotate.

[0035] The middle portion of the flip bracket 2 includes an embedding groove for arranging a hanger. A support structure 2a capable of supporting the flip bracket 2 is provided at the edge of the bottom of the embedding groove.

[0036] Positioning and fixing mechanisms 4 are located at each end of the tilting bracket 2. These mechanisms include a positioning cylinder 4a fixedly mounted on the tilting bracket 2. The axis of the positioning cylinder 4a is parallel to the rotating shaft. The actuator end of the positioning cylinder 4a is connected to a positioning cone 4b. The hanger has a positioning hole that mates with the positioning cone 4b. The positioning cone 4b points toward the positioning hole. The positioning cylinder 4a drives the positioning cone 4b into and out of the positioning hole.

[0037] The positioning hole is conical. The radius of the positioning hole opening is r. The vertical distance between the axis of the positioning hole and the support surface of the support structure 2a is h, and the vertical distance between the axis of the positioning cone 4b and the support surface of the support structure 2a is H; and h+r>H>h.

[0038] The turning table 1 is a common loading equipment in mechanical processing. The present application does not make any improvements to the turning table 1 itself, and it can be implemented by selecting appropriate specifications according to the existing technology. The turning table 1 mainly includes a main body, and a turning bracket 2 is rotatably installed on the table top of the main body. The front and rear sections of the turning bracket 2 are rotatably installed on the turning table 1, so that the entire turning bracket 2 can rotate on the turning table 1. The rotating shaft of the turning bracket 2 is horizontal. A manipulator structure is also provided on the table top of the turning table 1 on the left and right sides of the turning bracket 2. The manipulator operates the tooling fixture 5b on the hanger, and then uses the tooling fixture 5b to clamp the workpiece to be processed.

[0039] like Figure 1-3As shown in the figure, the flip bracket 2 is mainly a metal frame structure with a rotating shaft fixed at the front and rear ends of the metal frame, and the direction in which the rotating shaft extends is the front-to-back direction (X direction). The flip bracket 2 is driven to rotate by the flip motor 3 fixed on the flip table 1. During operation, the flip motor 3 will first rotate 180° in the forward direction to turn the entire flip bracket 2 to the reverse side, and then rotate 180° in the reverse direction to return the flip bracket 2 to its original position. The core component of the positioning and fixing structure is the positioning cone 4b, which is conical in shape, with its tip pointing to the front and rear ends of the hanger, and the axis of the positioning cone 4b is parallel to the rotating shaft of the flip bracket 2. The positioning and fixing mechanism 4 also includes a positioning cylinder 4a for driving the positioning cone 4b to move along its own axis. The positioning cylinder 4a can insert the positioning cone 4b into the positioning hole of the hanger and tighten it, so that the positioning cone 4b is inserted into the bottom of the positioning hole. At this time, the axis of the positioning hole and the axis of the positioning cone 4b coincide. No less than three positioning and fixing mechanisms 4 are set along the embedded groove of the flip bracket 2, and the three positioning and fixing mechanisms 4 are not on the same straight line. The hanger can be constrained by using three points to determine a plane.

[0040] In order to ensure that the positioning cone 4b can be smoothly inserted into the bottom of the positioning hole, the positioning hole is conical, the radius of the positioning hole opening is r, the vertical distance between the axis of the positioning hole and the supporting surface of the supporting structure 2a is h, the vertical distance between the axis of the positioning cone 4b and the supporting surface of the supporting structure 2a is H and h+r>H>h.

[0041] With the flip bracket 2 facing up, the robot arm positions the empty hanger 5 in the slot where the flip motor 3 is inserted. At this point, the hanger is merely placed on the support structure 2a; it is not positioned or fixed, leaving a certain amount of room for movement within the slot. The positioning cone 4b is then inserted into the positioning hole, aligned with the opening of the positioning hole. Due to the positional relationship h+r>H>h, the positioning cone 4b is aligned with the upper half of the positioning hole. As the positioning cone 4b is inserted, the hanger moves a certain distance upward. The hanger is then lifted off the support structure 2a.

[0042] When the present invention is working, the hanger is locked by the positioning cone 4b, so it is necessary to ensure that the positioning cone 4b does not move arbitrarily. The front and rear ends of the flip bracket 2 are provided with limiting holes, and the positioning rod is slidably arranged in the positioning holes. One end of the positioning rod is connected to the positioning cylinder 4a, and the other end is provided with a positioning cone 4b. The positioning rod will only slide forward and backward along the limiting hole. Figure 4 and Figure 5 As shown in FIG, the front end of the positioning rod is processed into a conical shape to form a positioning cone 4b. The positioning rod and the positioning cone 4b are different functional parts of the same part.

[0043] To reduce the shear stress on the hanger during positioning and fixing, the positioning mechanism at the top of the flip bracket 2 is aligned with the positioning and fixing mechanism 4 at the bottom of the flip bracket 2. This arrangement ensures that the hanger is only subject to compressive stress. The metal frame structure of the hanger body is more resistant to compression than to shear. Shear stress can easily cause the hanger to deform, affecting its positioning accuracy.

[0044] Preferably, the positioning and fixing mechanisms 4 comprise four independent sets, disposed at the four corners of the insertion slot of the flip bracket 2. The two positioning and fixing mechanisms 4 on the left side of the flip bracket 2 form a group, with their positioning rods coaxially aligned. Similarly, the two positioning and fixing mechanisms 4 on the right side of the flip bracket 2 form a group, with their positioning rods coaxially aligned. Furthermore, the axes of the positioning cylinders 4a of the four positioning and fixing mechanisms 4 are coplanar with the axis of the rotating shaft.

[0045] When installing a workpiece, the hanger is subjected to vertical stress. To improve the stability of the positioning cone 4b in the positioning hole and prevent the positioning cone 4b and the positioning hole from moving, the taper of the positioning cone 4b is less than 45°, and the taper of the positioning cone 4b and the positioning hole are the same.

[0046] The hanger comprises a frame 5a. Several fixtures 5b are mounted on the upper and lower surfaces of the frame 5a for clamping workpieces. The frame 5a comprises two front and rear crossbars, and several longitudinal beams connecting the front and rear crossbars. Each positioning cylinder 4a corresponds to at least one longitudinal beam, and the longitudinal beam and the positioning cylinder 4a are coaxial. This arrangement is also intended to enhance the overall deformation resistance of the hanger frame 5a.

[0047] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A metal parts hanger and turning table positioning and fixing structure, characterized in that: A turning bracket (2) is mounted on the turning table (1), and a rotating shaft is arranged at the front and rear sections of the turning bracket (2). The rotating shaft is arranged horizontally and rotatably mounted on the turning table. A turning motor (3) is also fixed on the turning table (1), and an output shaft of the turning motor (3) is connected to the rotating shaft of the turning bracket (2) and drives the turning bracket (2) to rotate. The middle portion of the flip bracket (2) includes an embedding groove for arranging a hanger, and a support structure (2a) capable of supporting the flip bracket (2) is provided at the edge of the bottom of the embedding groove; The two ends of the flip bracket (2) are respectively provided with positioning fixing mechanisms (4), the positioning fixing mechanisms (4) comprising a positioning cylinder (4a) fixedly mounted on the flip bracket (2), the axis of the positioning cylinder (4a) being parallel to the rotating shaft, the execution end of the positioning cylinder (4a) being connected to a positioning cone (4b), the hanger being provided with a positioning hole cooperating with the positioning cone (4b), the positioning cone (4b) pointing to the positioning hole, and the positioning cylinder (4a) driving the positioning cone (4b) to be inserted into or out of the positioning hole; The positioning hole is conical, the radius of the positioning hole opening is r, the vertical distance between the axis of the positioning hole and the support surface of the support structure (2a) is h, and the vertical distance between the axis of the positioning cone (4b) and the support surface of the support structure (2a) is H; and h+r>H>h.

2. The metal parts hanger and turning table positioning and fixing structure according to claim 1, characterized in that: Limiting holes are provided at the front and rear ends of the flip bracket (2), and a positioning rod is slidingly arranged in the positioning hole. One end of the positioning rod is connected to a positioning cylinder (4a), and the other end is provided with a positioning cone (4b).

3. The metal parts hanger and turning table positioning and fixing structure according to claim 1, characterized in that: The positioning mechanism at the top of the flip bracket (2) and the positioning and fixing mechanism (4) at the bottom of the flip bracket (2) are on the same straight line.

4. The metal parts hanger and turning table positioning and fixing structure according to claim 1, characterized in that: The positioning and fixing mechanism (4) comprises four sets that are independent of each other, and the four sets of fixing mechanisms are arranged at the four corners of the embedding groove of the flip bracket (2).

5. The metal parts hanger and turning table positioning and fixing structure according to claim 4, characterized in that: The axes of the positioning cylinders (4a) of the four positioning and fixing mechanisms (4) are in the same plane as the axis of the rotating shaft.

6. The metal parts hanger and turning table positioning and fixing structure according to claim 1, characterized in that: The taper of the positioning cone (4b) is less than 45°, and the taper of the positioning cone (4b) is the same as that of the positioning hole.

7. The metal parts hanger and turning table positioning and fixing structure according to claim 1, characterized in that: The hanger comprises a frame (5a), and a plurality of fixtures (5b) are respectively installed on the upper and lower surfaces of the frame (5a) for clamping the workpiece. The frame (5a) includes two front and rear cross bars, and a plurality of longitudinal beams connecting the front and rear cross bars. Any positioning cylinder (4a) corresponds to at least one longitudinal beam, and the longitudinal beam and the positioning cylinder (4a) are on the same axis.

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