A precision positioning fixture for threaded rod machining

Abstract

This utility model relates to the field of threaded rod processing, and more particularly to a precision positioning fixture for threaded rod processing. The fixture includes a jig, which comprises a worktable with a fixed support and a movable support. The movable support is driven by a lead screw drive mechanism. Adjacent surfaces of the fixed and movable supports are rotatably mounted with a three-jaw chuck assembly for clamping the threaded rod via bearing assemblies. The clamping surface of the jaws of the three-jaw chuck assembly is provided with a detachable clamping pad. Multiple inserts are fixedly installed at equal intervals on the back side of the clamping pads, and slots for inserting the inserts are provided on the jaws. In this utility model, the jig is used to position and clamp the threaded rod to be processed. After the jig has been used for a period of time, the clamping pads can be quickly disassembled and replaced, ensuring the stability of the subsequent positioning and clamping of the threaded rod.

Description

Technical Field

[0001] This utility model relates to the field of threaded rod and metal part processing technology, and in particular to a precision positioning tool for threaded rod processing. Background Technology

[0002] Threaded rods, also known as screws, are cylindrical and threaded during turning, grinding, milling, or drilling. During the machining of threaded rods, positioning fixtures are often used for positioning and clamping.

[0003] Some existing positioning fixtures use three-jaw chucks to position and clamp the ends of threaded rods. However, after long-term use, the clamping surfaces of the jaws of the existing three-jaw chucks will wear down, resulting in a further decrease in centering accuracy and a weakening of clamping force. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a precise positioning fixture for threaded rod machining.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A precision positioning fixture for machining threaded rods includes a clamp. The clamp includes a worktable with a fixed support and a movable support. The movable support is driven by a lead screw drive mechanism. Adjacent surfaces of the fixed support and the movable support are rotatably mounted with a three-jaw chuck assembly for clamping the threaded rod via a bearing assembly. The clamping surface of the jaws of the three-jaw chuck assembly is provided with a detachable clamping pad. Multiple inserts are fixedly installed at equal intervals on the back side of the clamping pads. The jaws are provided with slots for inserting the inserts. A limiting component is provided inside the jaws for limiting and locking the inserts. The limiting component includes a slider and a dust plug. The slider is slidably disposed in the claw body. A rod assembly is slidably disposed in the slider on one side of the slot. Multiple rod assemblies are connected by a connecting rod. A spring is provided in the slider to provide elastic reset for the rod assembly.

[0006] In addition, a preferred structure is that the sliding member includes a limiting slider, and an extension slider is provided at one end of the limiting slider and on the side of the corresponding slot. An auxiliary sliding groove is provided in the body of the claw within the sliding member.

[0007] In addition, a preferred structure is that a handle is connected to a sliding member extending from one end of the connecting rod, and a dust plug is screwed onto the outside of the pawl body located in the auxiliary sliding groove.

[0008] Furthermore, in a preferred configuration, an auxiliary sliding groove 2 is provided within the extension slider at the insertion rod assembly, the auxiliary sliding groove 2 contains a guide rod, and a guide sliding groove is provided within the insertion rod assembly at the guide rod.

[0009] In addition, a preferred structure is that the clamping surface of the claw body is provided with magnet blocks on both sides of the slot, and the back side of the clamping pad is provided with a mounting groove for inserting the magnet blocks, and the inner wall of the mounting groove is provided with a magnetic layer with the opposite polarity to the magnet blocks.

[0010] Furthermore, in a preferred configuration, the insert block has an insertion hole for the insertion rod assembly to pass through, and the claw body has a positioning slot for the insertion rod assembly to be inserted.

[0011] The beneficial effects of this utility model are as follows: In this invention, a fixture is used to position and clamp the threaded rod to be processed. After the fixture has been used for a period of time, the clamping pad can be quickly disassembled and replaced to ensure the stability of the subsequent positioning and clamping of the threaded rod. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a precision positioning fixture for threaded rod processing proposed in this utility model; Figure 2 This is a schematic diagram of a partially disassembled and sectional view of a three-jaw chuck. Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 This is a structural schematic diagram showing a partial disassembly and cross-section of the chuck body, clamping pad, and sealing plug.

[0013] In the diagram: 1. Clamp; 2. Three-jaw chuck assembly; 21. Jaw body; 22. Clamping pad; 23. Dust plug; 24. Sliding component; 25. Connecting rod; 251. Insertion rod assembly; 26. Spring; 27. Guide rod; 28. Insertion block; 29. ​​Magnet block. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figure 1-4A precision positioning fixture for threaded rod processing includes a fixture 1. The fixture 1 includes a worktable with a fixed support and a movable support. The movable support is driven by a lead screw drive mechanism. The adjacent surfaces of the fixed support and the movable support are rotatably provided with a three-jaw chuck assembly 2 for clamping the threaded rod through a bearing assembly. The clamping surface of the jaw body 21 of the three-jaw chuck assembly 2 is provided with a detachable clamping pad 22. Multiple inserts 28 are fixedly installed at equal intervals on the back side of the clamping pad 22. The jaw body 21 is provided with a slot for inserting the inserts 28. The jaw body 21 is provided with a limiting component for limiting and locking the inserts 28. It is worth noting that the fixtures are based on the clamping fixtures already available on commercially available turning machine tools, so they will not be described in detail here.

[0016] The limiting component includes a slider 24 and a dust plug 23. The slider 24 is slidably disposed within the claw body 21. A rod assembly 251 is slidably disposed within the slider 24 on one side of the slot. Multiple rod assemblies 251 are connected by a connecting rod 25. A spring 26 is provided within the slider 24 to provide elastic reset for the rod assembly 251. One end of the connecting rod 25 extends out of the slider 24 and is connected to a handle. A dust plug 23 is screwed onto the outside of the auxiliary sliding groove on the claw body 21.

[0017] The sliding member 24 includes a limiting slider, and an extension slider is provided at one end of the limiting slider and on the side of the corresponding slot. An auxiliary sliding groove is provided in the claw body 21 within the sliding member 24. An auxiliary sliding groove is provided in the extension slider at the insertion rod assembly 251. A guide rod 27 is provided in the auxiliary sliding groove, and a guide sliding groove is provided in the insertion rod assembly 251 at the guide rod 27.

[0018] Magnet blocks 29 are provided on both sides of the clamping surface of the claw body 21 and on both sides of the slot. The back side of the clamping pad 22 has a mounting groove for inserting the magnet blocks 29. The inner wall of the mounting groove is provided with a magnetic layer with the opposite polarity to that of the magnet blocks 29. The insertion block 28 has an insertion hole for inserting the insertion rod assembly 251, and the claw body 21 has a positioning slot for inserting the insertion rod assembly 251.

[0019] In this embodiment, when it is necessary to clamp the threaded rod, one end of the threaded rod is inserted into the three-jaw chuck and positioned and clamped by the three-jaw chuck. Then, the screw drive mechanism is controlled to move its movable support to the side of the fixed support until the other end of the threaded rod is inserted into the three-jaw chuck of the fixed support and positioned and clamped by the three-jaw chuck, thereby completing the overall clamping process of the threaded rod.

[0020] After the three-jaw chuck has been used for a period of time, its clamping pad 22 can be replaced. Loosen the dust plug by unscrewing the thread, and move it away from the jaw by holding the handle until it can no longer move. Then, move it away from the clamping surface of the jaw body by holding the connecting rod until it can no longer move. Then, release the handle and separate the clamping pad 22 from the jaw body.

[0021] Align the replaced clamping pad 22 with the slot and insert it until it is bent and inserted. Hold the connecting rod and move it towards the clamping surface of the claw body until it can no longer move. At this time, its mounting slot and the magnet block are magnetically attracted, and the insert rod assembly is reset under the action of the spring. It moves towards the insert block and inserts until the end of its insert rod assembly is inserted into the positioning slot of the claw body 21. Hold the dust plug and connect it to the threaded connection of the claw body to complete the replacement of the clamping pad.

[0022] In this invention, a fixture is used to position and clamp the threaded rod to be processed. After the fixture has been used for a period of time, the clamping pad 22 can be quickly disassembled and replaced to ensure the stability of the subsequent positioning and clamping of the threaded rod.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precision positioning fixture for machining threaded rods, comprising a clamp (1), characterized in that, The fixture (1) includes a worktable, on which a fixed support and a movable support are provided. The movable support is driven by a screw drive mechanism. The adjacent surfaces of the fixed support and the movable support are rotatably provided with a three-jaw chuck assembly (2) for clamping the threaded rod through a bearing assembly. The clamping surface of the jaw body (21) of the three-jaw chuck assembly (2) is provided with a detachable clamping pad (22). Multiple inserts (28) are fixedly installed at equal intervals on the back side of the clamping pad (22). The jaw body (21) is provided with a slot for inserting the inserts (28). The jaw body (21) is provided with a limiting component for limiting and locking the inserts (28). The limiting component includes a slider (24) and a dust plug (23). The slider (24) is slidably disposed in the claw body (21). A plug assembly (251) is slidably disposed in the slider (24) on one side of the slot. Multiple plug assemblies (251) are connected by a connecting rod (25). A spring (26) is provided in the slider (24) to provide elastic reset for the plug assembly (251).

2. The precision positioning fixture for threaded rod machining according to claim 1, characterized in that, The sliding member (24) includes a limiting slider, and an extension slider is provided at one end of the limiting slider and on the side of the corresponding slot. An auxiliary sliding groove is provided inside the claw body (21) in the sliding member (24).

3. The precision positioning fixture for threaded rod machining according to claim 1, characterized in that, One end of the connecting rod (25) extends into a sliding member (24) connected to a handle, and a dust plug (23) is screwed onto the outside of the claw body (21) located in the auxiliary sliding groove.

4. A precision positioning fixture for threaded rod machining according to claim 2, characterized in that, An auxiliary sliding groove is provided inside the extension slider at the insertion rod assembly (251), and a guide rod (27) is provided inside the auxiliary sliding groove. A guide groove is also provided inside the insertion rod assembly (251) at the guide rod (27).

5. A precision positioning fixture for threaded rod machining according to claim 3, characterized in that, The clamping surface of the claw body (21) and both sides of the slot are provided with magnet blocks (29), and the back side of the clamping pad (22) is provided with an installation groove for inserting the magnet blocks (29), and the inner wall of the installation groove is provided with a magnetic layer with the opposite polarity to the magnet blocks (29).

6. A precision positioning fixture for threaded rod machining according to claim 1, characterized in that, The insert block (28) has an insertion hole for the insertion rod assembly (251) to pass through, and the claw body (21) has a positioning slot for the insertion rod assembly (251) to be inserted.

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