A clamp

Abstract

This invention provides a clamp for holding wire-cut workpieces, including a rotating shaft, a power unit, a positioning unit, and a clamping unit. The rotating shaft is driven by and provides power to the power unit. Both the positioning unit and the clamping unit are fixedly connected to the rotating shaft. The power unit is installed between the positioning unit and the clamping unit. The positioning unit positions the rotating shaft, and the clamping unit clamps the workpiece and rotates with the rotating shaft, allowing the workpiece to rotate and be positioned precisely with the shaft. Locking and releasing the rotating shaft is achieved through the extension and retraction of a positioning cylinder and two positioning blocks. Positioning pins position the positioning blocks, maintaining their accuracy. High-precision workpiece rotation is achieved without calibration. The clamping unit includes a movable base that can hold various types of workpieces, ensuring quick workpiece changes and reducing investment costs.

Description

Technical Field

[0001] This utility model relates to the field of automated production equipment technology, and in particular to a clamp. Background Technology

[0002] In the field of automated wire EDM machining, parts require pre-setting outside the machine and in-machine processing. During in-machine processing, calibration is often necessary to ensure machining accuracy. However, adding pre-setting inside the machine increases the space occupied by the equipment and its operating time, reducing the utilization rate of the wire EDM equipment. Furthermore, existing processing equipment uses robotic arms as clamps, which have the disadvantage of not being able to hold workpieces perpendicular to the ground, and are also relatively expensive. Therefore, to address these issues, a more novel rotatable clamping mechanism needs to be designed. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a fixture that can quickly change workpieces and rotate them with high precision to meet processing requirements.

[0004] One embodiment of this utility model provides a clamp for clamping wire-cut workpieces, including: a rotating shaft, a power unit, a positioning unit, and a clamping unit. The rotating shaft is drivenly connected to the power unit and provides power to the rotating shaft. The positioning unit and the clamping unit are both fixedly connected to the rotating shaft. The power unit is installed between the positioning unit and the clamping unit. The positioning unit is used to position the rotating shaft, and the clamping unit is used to clamp the workpiece and rotate with the rotating shaft, so that the workpiece rotates and is positioned accurately with the rotating shaft.

[0005] Furthermore, the clamping unit includes a clamping body and a movable base detachably mounted on the clamping body, the movable base being provided with a clamping plate for clamping the workpiece.

[0006] Furthermore, the clamping body includes a connecting plate and a mounting plate, which are respectively arranged in two mutually perpendicular planes. One side of the connecting plate is connected to one side of the mounting plate. The connecting plate is fixedly connected to the rotating shaft, and the mounting plate is detachably connected to the movable base.

[0007] Furthermore, the fixture also includes a limiting unit sleeved on the rotating shaft for limiting the rotation shaft, and the limiting unit is installed between the positioning unit and the clamping unit.

[0008] Furthermore, the power unit includes a rotary cylinder for providing rotational power and a connecting rod connected between the rotary cylinder and the rotating shaft, the connecting rod being installed between the limiting units.

[0009] Furthermore, the positioning unit includes a positioning cylinder for driving positioning and a first positioning block for locking or releasing positioning, the first positioning block being mounted on the side of the positioning cylinder facing the limiting unit.

[0010] Furthermore, the positioning unit also includes a second positioning block that fits into the first positioning block, and the side of the second positioning block facing away from the first positioning block is fixedly connected to the rotating shaft.

[0011] Furthermore, the fixture also includes a base plate, which includes a base plate body and a locating pin base disposed at one end of the base plate body, the locating pin base being sleeved on the second locating block.

[0012] Furthermore, the positioning unit also includes a positioning pin for maintaining the connection accuracy of the first positioning block, the positioning pin passing through the first positioning block to connect the cylinder to the positioning pin base.

[0013] Furthermore, both the power unit and the limiting unit are mounted on the base plate, with the limiting unit mounted on the side of the positioning pin base facing the clamping unit.

[0014] This utility model provides a fixture, including a base plate, a rotating shaft, a power unit, a positioning unit, a limiting unit, and a clamping unit. The positioning unit includes a positioning cylinder, a first positioning block, a second positioning block, and a positioning pin. The positioning cylinder and the extension and retraction of the two positioning blocks complete the locking and releasing positioning of the rotating shaft. The positioning pin positions the first positioning block, maintaining its accuracy, thereby achieving high-precision rotation of the workpiece without calibration. The clamping unit includes a clamping body and a movable base. The movable base can clamp various types of workpieces, ensuring quick workpiece changes and achieving the goal of pre-setting external components for direct internal processing, while reducing the investment cost of the robotic arm. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a clamp provided in a preferred embodiment of the present invention.

[0017] Figure 2 for Figure 1 A schematic diagram of the combination of the positioning unit and the clamping unit of the provided fixture.

[0018] In the figure: base plate 1; base plate body 11; positioning pin base 12; support block 13; rotating shaft 2; power unit 3; rotary cylinder 31; connecting rod 32; connecting section 321; rotating section 322; support plate 33; positioning unit 4; positioning cylinder 41; first positioning block 42; second positioning block 42; positioning pin 44; limiting unit 5; housing 51; buffer 52; clamping unit 6; clamping body 61; connecting plate 611; mounting plate 612; movable base 62; workpiece 7. Detailed Implementation

[0019] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] The main purpose of this application is to provide a more novel fixture to solve the problems of in-machine preset and low equipment utilization in existing wire EDM equipment, and to reduce the investment cost of robotic arms, so as to achieve high-precision rotary machining requirements.

[0021] Please refer to the following first. Figure 1 and Figure 2 One embodiment of this application provides a clamp that can be used in wire EDM equipment for clamping wire-cut workpieces.

[0022] like Figure 1 As shown, one embodiment of this application provides a fixture, including a base plate 1, a rotating shaft 2, a power unit 3, a positioning unit 4, and a clamping unit 6. The rotating shaft 2 is driven by the power unit 3, which provides power to the rotating shaft 2. The positioning unit 4 and the clamping unit 6 are both fixedly connected to the rotating shaft 2, and the power unit 3 is installed between the positioning unit 4 and the clamping unit 6. The rotating shaft 2 ensures smooth rotation of the workpiece 7, rotational accuracy, and overall rigidity of the device.

[0023] The power unit 3 provides power for the rotation of the rotating shaft 2 and includes a rotary cylinder 31 and a connecting rod 32. Specifically, the rotary cylinder 31 provides power, and the connecting rod 32 connects the rotary cylinder 31 to the rotating shaft 2. The rotary cylinder 31 is mounted on the base plate 1, and the connecting rod 32 is perpendicular to the rotating shaft 2 and connected for transmission. The connecting rod 32 includes a connecting section 321 and a rotating section 322. The connecting section 321 connects the rotary cylinder 31 to the rotating section 322, and the rotating section 322 is fixedly connected to the rotating shaft 31 to form a whole. The rotating section 322 is hinged to the connecting section 321, and the rotary cylinder 31 can drive the rotating section 322 to rotate around the hinge point, that is, drive the rotating shaft 2 to rotate. In addition, two support plates 33 are provided at the end of the rotary cylinder 31 away from the rotating shaft. The two support plates 33 are provided on both sides of the rotary cylinder 31 to connect the rotary cylinder 31 to the base plate 1.

[0024] like Figure 2 As shown, the positioning unit 4 is used to position the rotating shaft 2, and includes a positioning cylinder 41, a first positioning block 42, a second positioning block 43, and a positioning pin 44. Specifically, the positioning cylinder 41 is used to drive and disconnect the positioning, and the first positioning block 42 is used to lock or release the positioning. The first positioning block 42 is installed on the side of the positioning cylinder 41 facing the rotating shaft 2 and is fixedly connected to the telescopic rod of the positioning cylinder 41. The positioning cylinder 41 controls the forward and backward movement of the first positioning block 42 by the extension and retraction of the telescopic rod to complete the locking and releasing of the positioning of the rotating shaft 2. One end of the positioning pin 44 is fixedly connected to the positioning cylinder 41 and passes through the first positioning block 42 to be fixedly connected to the positioning pin base 12 of the base plate 1 to maintain the accurate installation and positioning of the first positioning block 42. Meanwhile, the first positioning block 42 is installed between the positioning cylinder 41 and the second positioning block 43. The second positioning block 43 is preferably a circular plate. The side of the second positioning block 43 facing away from the first positioning block 42 is fixedly connected to the rotating shaft 2. The side of the first positioning block 42 opposite to the second positioning block 43 is provided with a protrusion, and the side of the second positioning block 43 opposite to the protrusion is provided with a groove that engages with the protrusion. Therefore, when the positioning cylinder 41 drives the first positioning block 42 to extend, the first positioning block 42 engages with the second positioning block 43, preventing the second positioning block 43 and the rotating shaft 2 from rotating, thereby achieving the positioning of the rotating shaft 2. Similarly, when the positioning cylinder 41 drives the first positioning block 42 to retract, the first positioning block 42 separates from the second positioning block 43, allowing the second positioning block 43 to continue rotating with the rotating shaft 2, thereby releasing the positioning of the rotating shaft 2 and completing the rapid and accurate positioning of the rotating shaft 2, that is, achieving the accurate rotation and positioning of the clamping unit 6 and the workpiece 7.

[0025] The clamping unit 6 is used to clamp the workpiece 7. It is fixedly connected to the rotating shaft 2 and can rotate with the rotating shaft 2 so that the workpiece 7 can rotate and be positioned accurately with the rotating shaft 2. Specifically, the clamping unit 6 includes a clamping body 61 and a movable base 62. The movable base 62 is detachably mounted on the clamping body 61. The clamping body 61 includes a connecting plate 611 and a mounting plate 612. The connecting plate 611 and the mounting plate 612 are respectively arranged in two mutually perpendicular planes. One side of the connecting plate 611 is connected to one side of the mounting plate 612 to form a whole. The side of the connecting plate 611 facing the positioning unit 4 is fixedly connected to the rotating shaft 2 so that the clamping unit 5 can rotate with the rotating shaft 2. The mounting plate 612 is provided with a protruding mounting seat, and the movable base 62 is detachably mounted on the mounting seat of the mounting plate 612. The mobile base 62 is equipped with a clamping plate for clamping the workpiece. The clamping plate is arranged parallel to the workpiece 7. The mobile base 62 can be any component that performs the clamping function, thereby enabling the clamping of various types of workpieces 7, improving the utilization rate of the fixture. Furthermore, the mobile base 62 is detachably connected to the clamping body 61, allowing for quick replacement with different types of mobile bases 62 according to the type of workpiece 7. This achieves the purpose of pre-setting outside the machine and direct processing inside the machine, while reducing the investment cost of the robot.

[0026] The fixture also includes a limiting unit 5, which limits the rotation range of the rotating shaft 2. The limiting unit 5 is sleeved on the rotating shaft 2 and installed between the clamping body 61 and the second positioning block 43. The limiting unit includes a housing 51 and a buffer 52. The housing 51 is a square housing with openings at the top and bottom. The rotating shaft 2 passes through the housing 51, and the rotating section 322 of the connecting rod 32 is installed between the two walls of the housing 51. Therefore, the rotation angle of the rotating section 322 is limited by the housing 51, thereby achieving the purpose of limiting. The buffer 52 is disposed in the housing 52 and installed on both sides of the rotating shaft 2. The buffer 52 can be a rubber material with a cushioning effect. In this embodiment, U-shaped rubber is preferred. It plays a cushioning role when the rotating shaft 2 vibrates.

[0027] The base plate 1 is a long strip plate, the length of which is consistent with the length of the rotary cylinder 31. It includes a base plate body 11 and a positioning pin base 12. The power unit 3, positioning unit 4 and limiting unit 5 are all mounted on the base plate body 11. The positioning pin base 12 is mounted on one end of the base plate body 11 near the rotating shaft 2, and the positioning pin base 12 is sleeved on the second positioning block 43 to fix the second positioning block 43 to the base plate 1. One end of the positioning pin 44 is fixed on the positioning cylinder 41, and passes through the first positioning block 42 to fix the other end on the positioning pin base 12, so that the first positioning block 42 is stable relative to the positioning pin base 12, thereby maintaining the positioning accuracy of the first positioning block 42, which makes it easy for the processing equipment to achieve high-precision rotation without calibration. The base plate body 11 has a support block 13 at the end away from the rotating shaft 2. The support block 13 is used to raise the end of the rotary cylinder 31 so that the rotary cylinder 31 is at the same height as the rotating shaft 2 and the connecting rod 32. The support block 13 is fixedly connected to the rotary cylinder 31 through two support plates 33.

[0028] Based on the aforementioned fixture, the specific process for high-precision rotation of the fixture is as follows: Rotary cylinder 31 drives rotating shaft 2 to rotate via connecting rod 32. At this time, the telescopic rod of positioning cylinder 41 retracts, separating the first positioning block 42 from the second positioning block 43. Both the second positioning block 43 and the clamping body 61 rotate with rotating shaft 2. The rotation of clamping body 61 means that the mobile base 62 clamps and rotates the workpiece 7. When the workpiece 7 rotates to an appropriate angle, the telescopic rod of positioning cylinder 41 extends, and the first positioning block 42 engages with the second positioning block 43, restricting the rotation of rotating shaft 2 and preventing further rotation. The clamping body 61 also stops rotating, and the workpiece 7 stops rotating accordingly, thus achieving the processing requirement of high-precision rotation without calibration. Furthermore, when the workpiece 7 is different, a suitable mobile base 62 can be directly replaced according to the type of workpiece 7 to ensure quick workpiece replacement, while also considering the versatility of the robotic gripper and reducing the investment cost of the robotic arm.

[0029] In summary, the above-described embodiments of this utility model provide a clamp for clamping wire-cut workpieces, including a base plate 1, a rotating shaft 2, a power unit 3, a positioning unit 4, a limiting unit 5, and a clamping unit 6. The positioning unit 4 includes a positioning cylinder 41, a first positioning block 42, a second positioning block 43, and a positioning pin 44. The positioning cylinder 41 and the two positioning blocks extend and retract to lock and release the rotating shaft 2, while the positioning pin 44 positions the first positioning block 42, maintaining its positioning accuracy. This allows for high-precision rotation of the rotating shaft 2 and the workpiece 7 without the need for calibration. The clamping unit 6 includes a clamping body 61 and a movable base 62. The movable base 62 can clamp various types of workpieces 7, ensuring quick workpiece replacement and achieving the goal of pre-setting outside the machine for direct in-machine processing, while reducing the cost of the robotic arm.

[0030] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A clamp for holding a wire-cut workpiece, characterized in that, include: The device includes a rotating shaft, a power unit, a positioning unit, and a clamping unit. The rotating shaft is connected to the power unit and provides power to the rotating shaft. The positioning unit and the clamping unit are both fixedly connected to the rotating shaft. The power unit is installed between the positioning unit and the clamping unit. The positioning unit is used to position the rotating shaft, and the clamping unit is used to clamp the workpiece and rotate with the rotating shaft so that the workpiece can rotate and be positioned accurately with the rotating shaft.

2. The clamp as described in claim 1, characterized in that, The clamping unit includes a clamping body and a movable base detachably mounted on the clamping body, wherein the movable base is provided with a clamping plate for clamping the workpiece.

3. The clamp as described in claim 2, characterized in that, The clamping body includes a connecting plate and a mounting plate. The connecting plate and the mounting plate are respectively arranged in two mutually perpendicular planes. One side of the connecting plate is connected to one side of the mounting plate. The connecting plate is fixedly connected to the rotating shaft. The mounting plate is detachably connected to the movable base.

4. The clamp as described in claim 1, characterized in that, The clamp also includes a limiting unit sleeved on the rotating shaft for limiting the rotating shaft, and the limiting unit is installed between the positioning unit and the clamping unit.

5. The clamp as described in claim 4, characterized in that, The power unit includes a rotary cylinder for providing rotational power and a connecting rod connecting the rotary cylinder and the rotating shaft, the connecting rod being installed between the limiting units.

6. The clamp as described in claim 5, characterized in that, The positioning unit includes a positioning cylinder for driving positioning and a first positioning block for locking or releasing positioning, the first positioning block being mounted on the side of the positioning cylinder facing the limiting unit.

7. The clamp as described in claim 6, characterized in that, The positioning unit further includes a second positioning block that fits into the first positioning block, and the side of the second positioning block facing away from the first positioning block is fixedly connected to the rotating shaft.

8. The clamp as described in claim 7, characterized in that, The fixture also includes a base plate, which includes a base plate body and a positioning pin base disposed at one end of the base plate body. The positioning pin base is sleeved on the second positioning block.

9. The clamp as described in claim 8, characterized in that, The positioning unit further includes a positioning pin for maintaining the connection accuracy of the first positioning block, the positioning pin passing through the first positioning block to connect the cylinder to the positioning pin base.

10. The clamp as described in claim 9, characterized in that, Both the power unit and the limiting unit are mounted on the base plate, with the limiting unit mounted on the side of the positioning pin base facing the clamping unit.

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