Flip-marking fixture

Abstract

This invention provides a flip-type marking fixture. A pin holder is connected to a rotating shaft driven by a drive unit. A pin is located on a surface of the pin holder opposite to the rotating shaft. A limiting surface is provided beside the pin, which fits against the non-circular surface of the workpiece. The pin is inserted into a process hole on the workpiece. This invention, by providing a pin on the pin holder, allows the pin and the limiting surface to jointly define the position of the workpiece, creating a plug-and-play engagement between the workpiece and the pin on the pin holder. This enables the workpiece to be quickly installed or removed from the flip-type marking fixture, thus accelerating the production pace of the marking operation.

Description

Technical Field

[0001] This invention relates to the field of laser marking technology, and more specifically to a flip marking fixture. Background Technology

[0002] Laser marking is a marking method that uses high-energy-density laser light to locally irradiate a workpiece, causing the surface material to vaporize or change color, thus leaving a permanent mark. It is often used for product identification and anti-counterfeiting. In specific industrial production scenarios, it is sometimes necessary to mark multiple parts of the outer surface of a workpiece. Existing technology usually uses a flipping fixture to flip the workpiece so that the surfaces to be marked face the marking machine. For example, the solution disclosed in the patent entitled "A Multi-Station Synchronous Flipping Mechanism" (CN223606481U) includes a base, a drive component, a guide block, and several rotating shafts. A rack is slidably connected to the guide block, and several rotating shafts are arranged sequentially along the length of the rack. One end of each rotating shaft is fixedly connected to a gear that meshes with the rack, and the other end passes through the base and is fixedly connected to a product station. The aforementioned solution uses a drive component to move a rack, which in turn drives a gear to rotate, ultimately causing the product station to rotate and flip. However, this solution does not disclose the specific structural features that allow the workpiece to be marked to engage with the product station; it only discloses that the product station can be equipped with a clamping mechanism or a suction nozzle to fix the product, without providing any positioning solutions for rapid loading and unloading. When the production line needs to perform marking operations in large batches quickly, the loading and unloading time of the workpiece on the flipping fixture is a key factor restricting the efficiency of marking production. Summary of the Invention

[0003] The purpose of this invention is to provide a flipping marking fixture that can meet the needs of flipping workpieces and quickly and accurately achieve the positioning and matching of workpieces and fixtures, thus shortening the loading and unloading time.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a flipping marking fixture, wherein a pin seat is connected to a rotating shaft driven by a drive unit, a pin is provided on the seat surface of the pin seat that is different from the rotating shaft, a limiting surface is provided on the side of the pin, the limiting surface is in contact with the non-circular surface of the workpiece to be processed, and the pin is inserted into the process hole on the workpiece to be processed, together forming a constraint limit applied to the workpiece to be processed and forming a synchronous and unidirectional rotation fit of the workpiece to be processed with the rotating shaft.

[0005] This invention primarily involves setting a pin on the seat surface of the pin holder, which is different from the rotating shaft. During processing, the process hole on the workpiece to be marked is aligned with the pin and inserted. The limiting surface on the seat surface of the pin holder fits against the non-circular surface of the workpiece, thereby positioning the workpiece and allowing it to rotate synchronously and in the same direction with the rotating shaft. The plug-and-play engagement between the workpiece and the pin allows for quick installation or removal of the workpiece on the flip-marking fixture, thus shortening the loading and unloading time of the workpiece at the marking station and accelerating the production pace of the marking operation. Attached Figure Description

[0006] Figure 1 A schematic diagram of a flip-type marking fixture;

[0007] Figure 2 A schematic diagram showing the marking fixture after the cover has been removed.

[0008] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0009] Figure 4 This is a sectional view of the rotating shaft;

[0010] Figure 5 This is a schematic diagram of the base. Detailed Implementation

[0011] This fixture is suitable for workpieces with a cylindrical shape that need to be marked, such as... Figures 1-4 The workpiece A shown in the diagram is a locking device. The cross-sectional shape of the locking device is typically rectangular, oblong, or even elliptical. (See attached document.) Figures 1-4 The illustrated embodiment features a rectangular lock body with a process hole or keyhole formed on the bottom surface away from the rope. See also Figures 1-5 The flipping marking fixture shown has a pin seat 31 connected to a rotating shaft 30 driven by a drive unit 10. The pin seat 31 has a pin 311 on a seat surface different from the rotating shaft 30. A limiting surface 312 is provided on the side of the pin 311. The limiting surface 312 is in contact with the non-circular surface of the workpiece A to be processed. The process hole on the workpiece A where the pin 311 is inserted together constitutes a constraint limit applied to the workpiece A and constitutes a synchronous and unidirectional rotation of the workpiece A with the rotating shaft 30.

[0012] In the above scheme, the seat surface of the pin seat 31 that is different from that of the rotating shaft 30 is the suspension end face of the pin seat 31 adjacent to the workpiece A to be processed. Figures 1-4In the illustrated embodiment, a boss extends from the suspension end face of the pin seat 31, located beside the pin 311. The boss, adjacent to the inner surface of the pin 311, forms a limiting surface 312. In practical applications, the lock body of the workpiece A is placed on the pin 311 by a robotic arm or manual operation. The diameter of the process hole on the bottom surface of the lock body matches the rod diameter of the pin 311. When the bottom surface of the lock body abuts against the suspension end face of the pin seat 31, the limiting surface 312 on the pin seat 31 also simultaneously abuts against the non-circular surface of the lock body of the workpiece A. The former restricts the position of the workpiece A in the axial direction of the rotating shaft 30, while the latter limits the workpiece A to rotate synchronously and in the same direction with the pin seat 31, facilitating the flipping of the workpiece A to cooperate with the marking machine for marking operations on different parts of its lock body circumference. Since the workpiece A and the pin 311 are in a plug-in engagement, the speed of loading and unloading is greatly improved compared with traditional positioning solutions such as clamping or suction cup adsorption. At the same time, it can accurately limit the posture and position of the workpiece A, which is conducive to speeding up the production rhythm of marking operations.

[0013] As a preferred embodiment, the pin 311 is a suspension section through which the rotating shaft 30 passes and is suspended outside the end face of the pin seat 31. Furthermore, the pin seat 31 has a through hole for the rotating shaft 30 to pass through, and the two are connected by a key fit, ensuring that the pin seat 31 and the rotating shaft 30 rotate synchronously and in the same direction. Figure 4 As shown, the pin 311 and the rotating shaft 30 are integrated, with the pin seat 31 fitted onto the rotating shaft 30 and the pin 311 protruding from the outside of the pin seat 31. This design allows the fixture to utilize workpieces A of different specifications. When a workpiece A with a different lock body size needs to be replaced for marking, simply replace it with a pin seat 31 that matches its specifications so that the limiting surface 312 fits against the non-circular surface of the workpiece A.

[0014] More specifically, the drive unit 10 is fixed on the base 1. The output end of the drive unit 10 is connected to the rack 21 and drives the rack 21 to reciprocate along its length. The gear 22 on the rotating shaft 30, which is rotatably mounted on the base 1, meshes with the rack 21 to form a gear and rack mechanism 20. Preferably, the base 1 is provided with a cover 2, and the gear and rack mechanism 20 is located within the enclosed area of ​​the base 1 and the cover 2. The rotating shaft 30 and the cover 2 form a rotational fit. In the above scheme, the pin seat 31 is located on the shaft of the rotating shaft 30, which is suspended and exposed outside the cover 2. Bearings 40 are respectively provided on the shaft section of the rotating shaft 30 between the pin seat 31 and the gear 22, and on the shaft section of the rotating shaft 30 away from the pin seat 31 and between the gear 22. The outer ring of the bearing 40 is fixed to the cover 2 to reduce the frictional resistance generated by the rotation of the rotating shaft 30. In this embodiment, the drive unit 10 can be a linear motor or a cylinder, and its output end is connected to one end of the rack 21, and the driving direction of the drive unit 10 is consistent with the length direction of the rack 21.

[0015] To accommodate the mass production of workpiece A, at least two rotating shafts 30 are provided. The rotating shafts 30 are arranged parallel to each other along the length of the rack 21. The pin seats 31 and pins 311 on the rotating shafts 30 are located on the same side of the rack 21 to facilitate loading and unloading operations.

[0016] As a preferred embodiment, the pin seat 31 has two limiting surfaces 312 on its seat surface, which is different from the rotating shaft 30. The two limiting surfaces 312 are arranged perpendicularly to each other or oppositely, and they abut against adjacent or opposite cylindrical surfaces of the rectangular prism of the workpiece A. The two limiting surfaces 312 simultaneously fit against the non-circular surfaces of the workpiece A, making the limiting effect more reliable. To avoid interference caused by insufficient dimensional accuracy of the limiting surfaces 312 or the workpiece A, a notch 313 is provided at the intersection of the two perpendicular limiting surfaces 312 to avoid the edges of the workpiece A. When machining the two perpendicular limiting surfaces 312, the intersection is most prone to defects; the notch 313 significantly reduces the requirements for the machining accuracy of the limiting surfaces 312.

[0017] To limit the reciprocating direction of the rack 21, a guide groove 3 is provided on the platform of the base 1 to accommodate the rack 21. The width of the guide groove 3 is the same as the width of the rack 21, and the tooth surface of the rack 21 faces the same direction as the opening of the guide groove 3. In addition to its guiding function, the guide groove 3 can also reduce the space occupied by the rack 21, making the tooling structure more compact.

[0018] To limit the rotation angle of the rotating shaft 30, the rotating shaft 30 is located above the platform of the base 1. An angled block 50, rotating synchronously and in the same direction as the rotating shaft 30, is provided on the shaft segment of the rotating shaft 30 away from the pin seat 31. The angled block 50 has a rounded corner 51, the center of which coincides with the axis of the rotating shaft 30, and the height of the axis of the rotating shaft 30 from the platform of the base 1 is the same as the radius of the rounded corner 51. The two edges of the angled block 50 adjacent to the rounded corner 51 form a 90-degree angle, and these two edges abut against the platform of the base 1 as the rotating shaft 30 rotates. Figure 1 As shown, in this embodiment, the corner block 50 limits the rotation range of the rotating shaft 30 to 90 degrees. During the rotation of the rotating shaft 30, the rounded corner portion 51 of the corner block 50 remains in contact with the table surface of the base 1. When the rotating shaft 30 rotates to the two ends of its stroke limit, the two edges of the corner block 50 adjacent to the rounded corner portion 51 abut against the table surface of the base 1.

Claims

1. A flipping marking fixture, characterized in that: The pin seat (31) is connected to the rotating shaft (30) driven by the drive unit (10). The pin seat (31) has a pin (311) on the seat surface that is different from the rotating shaft (30). A limiting surface (312) is provided on the side of the pin (311). The limiting surface (312) is in contact with the non-circular surface of the workpiece (A) to be processed. The process hole on the workpiece (A) where the pin (311) is inserted together constitutes the constraint limit applied to the workpiece (A) to be processed and constitutes the synchronous and same-direction rotation of the workpiece (A) with the rotating shaft (30).

2. The flipping marking fixture according to claim 1, characterized in that: The pin (311) is a suspension section through which the pivot (30) passes through the pin seat (31) and is suspended outside the end face of the pin seat (31).

3. The flipping marking fixture according to claim 1 or 2, characterized in that: The pin seat (31) has a through hole through which the rotating shaft (30) passes and the two are connected by a key.

4. The flipping marking fixture according to claim 1 or 2, characterized in that: The drive unit (10) is fixed on the base (1). The output end of the drive unit (10) is connected to the rack (21) and drives the rack (21) to reciprocate along the length of the rack (21). The gear (22) on the rotating shaft (30) on the base (1) meshes with the rack (21) to form a gear and rack mechanism (20).

5. The flipping marking fixture according to claim 4, characterized in that: At least two rotating shafts (30) are provided. The rotating shafts (30) are arranged parallel to each other along the length of the rack (21). The pin seat (31) and pin (311) on the rotating shaft (30) are located on the same side of the rack (21).

6. The flipping marking fixture according to claim 1 or 2, characterized in that: The pin seat (31) has two limiting surfaces (312) on the seat surface that is different from the rotating shaft (30). The two limiting surfaces (312) are arranged perpendicular to each other or opposite to each other. The two limiting surfaces (312) abut against the adjacent two cylindrical surfaces or opposite two cylindrical surfaces of the rectangular column of the workpiece (A) to be processed.

7. The flipping marking fixture according to claim 6, characterized in that: The intersection of the two perpendicular limiting surfaces (312) is provided with a notch (313) that avoids the corner of the workpiece (A).

8. The flipping marking fixture according to claim 4, characterized in that: The base (1) is provided with a cover (2), and the gear and rack mechanism (20) is located in the enclosed area of ​​the base (1) and the cover (2). The rotating shaft (30) and the cover (2) form a rotational engagement.

9. The flipping marking fixture according to claim 4, characterized in that: The base (1) has a guide groove (3) on its platform to accommodate the rack (21). The width of the guide groove (3) is the same as the width of the rack (21), and the tooth surface of the rack (21) faces the same direction as the opening of the guide groove (3).

10. The flipping marking fixture according to claim 4, characterized in that: The rotating shaft (30) is located above the platform of the base (1). The shaft segment of the rotating shaft (30) away from the pin seat (31) is provided with an angle block (50) that rotates synchronously and in the same direction as the rotating shaft (30). The angle block (50) is provided with a rounded corner (51). The center of the rounded corner (51) coincides with the axis of the rotating shaft (30), and the height of the axis of the rotating shaft (30) from the platform of the base (1) is the same as the radius of the rounded corner (51). The two sides of the angle block (50) adjacent to the rounded corner (51) form a 90-degree angle. The two sides abut against the platform of the base (1) as the rotating shaft (30) rotates.

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