Molybdenum filament long rod precision bending tool

Abstract

The utility model introduces a kind of molybdenum filament long pole precision bending tool, including base, limit board, big axle, small axle and briquetting;Base is cuboid block structure, and the corner of base front end is formed into right angle installation step with corner missing;Limit board is set on base with horizontal span workpiece placing groove A;Big axle rotation is set on the installation step of base;Small axle front end is fixed on big axle by screw;Briquetting is set on big axle with corresponding workpiece placing groove B.The utility model's structure is simple, convenient to use, prevent workpiece distortion by the cooperation of briquetting and limit board, ensure the stability of workpiece when processing;Through the cooperation of small axle and big axle and base structure, accurate bending position, bending angle and bending arc size can be achieved, ensure workpiece machining precision, save time and effort in processing, improve processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of molybdenum workpiece processing technology, and in particular to a precision bending fixture for a long molybdenum lamp filament rod. Background Technology

[0002] The long rod of the molybdenum filament is in the shape of a stepped pipe. The dimensional and geometric tolerances of the bent section of the stepped shaft need to be precisely controlled. Using conventional bending methods will result in inaccurate bending position, incorrect bending angle, incorrect arc size at the bending point, and twisting and deformation of the rod material after bending. In order to improve the manufacturing accuracy and meet the yield requirements, a set of precision bending fixtures for this order was designed. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a precision bending fixture for molybdenum filament rods. It has a simple structure, is easy to use, and produces high-precision bent products.

[0004] The technical solution adopted in this utility model is:

[0005] A precision bending fixture for a long molybdenum filament rod includes a base, a limiting plate, a large shaft, a small shaft, and a pressure block;

[0006] The base is a rectangular block structure. A right-angle mounting step is formed by a missing corner at the front end of the base. The corner of the mounting step is rounded. A workpiece placement groove A is provided in the middle of the upper surface of the base along the length direction. The workpiece placement groove A corresponds to the structure at the rear end of the workpiece.

[0007] The limiting plate has an n-shaped structure, and a groove A matching the shape of the workpiece is provided in the middle of the lower side of the limiting plate. The limiting plate is set on the base across the workpiece placement groove A.

[0008] The main shaft is rotatably mounted on the mounting step of the base. The rear end of the main shaft is set as a semi-circle that matches the corner of the mounting step. The upper surface of the main shaft is provided with a workpiece placement groove B that corresponds to and is connected to the workpiece placement groove A. The workpiece placement groove B corresponds to the front end structure of the workpiece.

[0009] The rear end of the small shaft is provided with a stepped bending forming part, which is corresponding to the workpiece placement groove B. The outer edge of the bending forming part is an arc shape that matches the arc size of the workpiece bending point. The front end of the small shaft is fixed to the large shaft with screws.

[0010] The lower side of the rear end of the pressure block is provided with a groove B corresponding to the workpiece placement groove B structure, and the pressure block is set on the main shaft corresponding to the workpiece placement groove B.

[0011] Specifically, the mounting step of the base has a vertically penetrating mounting hole, a washer is provided on the lower side of the mounting hole, a rotating shaft is provided on the lower side of the rear end of the main shaft, a threaded hole is provided at the center of the lower end of the rotating shaft, and a screw passes through the washer and is placed in the threaded hole of the rotating shaft, so that the main shaft is rotated and mounted on the base.

[0012] Specifically, the base has symmetrical mounting slots on both sides of the workpiece placement slot A, and a connecting hole is provided at the bottom of the mounting slot. The limiting plate has countersunk holes corresponding to the connecting holes. Screws pass through the countersunk holes and are placed in the connecting holes to fix the limiting plate on the base and press the rear end of the workpiece.

[0013] Specifically, a square positioning protrusion is provided on the lower side of the bending and forming part of the small shaft, and a small shaft positioning groove matching the positioning protrusion is provided on one side of the workpiece placement groove B on the large shaft, with the positioning protrusion located inside the small shaft positioning groove.

[0014] Specifically, a protrusion is provided on the lower side of the front end of the pressure block, and a corresponding connecting groove is provided on the main shaft. A screw hole is provided at the bottom of the connecting groove. The screw passes through the front end of the pressure block and is placed in the screw hole of the main shaft to fix the pressure block on the main shaft and press the front end of the workpiece tightly.

[0015] Due to the adoption of the technical solution described above, this utility model has the following advantages:

[0016] This utility model has a simple structure and is easy to use. The cooperation of the pressure block and the limiting plate prevents the workpiece from twisting and deforming under force, ensuring the stability of the workpiece during processing. The cooperation of the small shaft and the large shaft with the base structure enables precise bending position, bending angle and bending arc size, ensuring workpiece processing accuracy, saving time and effort, and improving processing efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the initial state of the workpiece before processing according to this utility model.

[0018] Figure 2 This is a schematic diagram of the workpiece after processing according to this utility model.

[0019] Figure 3 This is a structural schematic diagram of the base of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the limiting plate of this utility model.

[0021] Figure 5 This is a schematic diagram of the structure of the large shaft of this utility model.

[0022] Figure 6 This is a structural schematic diagram of the small shaft of this utility model.

[0023] Figure 7This is a schematic diagram of the structure of the pressure block of this utility model.

[0024] In the diagram: 1-base, 11-mounting step, 111-mounting hole, 12-workpiece placement groove A, 13-mounting groove, 2-limiting plate, 21-groove A, 3-large shaft, 31-rotating shaft, 32-workpiece placement groove B, 33-small shaft positioning groove, 34-connecting groove, 4-small shaft, 41-bending forming part, 42-positioning protrusion, 5-pressure block, 51-protrusion, 52-groove B, 6-workpiece. Detailed Implementation

[0025] The present invention will be further explained below with reference to the accompanying drawings and embodiments. However, this explanation should not be construed as limiting the scope of protection of the present invention. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0026] Combined with appendix Figures 1-7 The fixture shown is a precision bending tool for a long molybdenum filament rod, comprising a base 1, a limiting plate 2, a large shaft 3, a small shaft 4, and a pressure block 5.

[0027] The base 1 is a rectangular block structure. A right-angle mounting step 11 is formed by a missing corner at the front end of the base 1. The corner of the mounting step 11 is rounded. A mounting hole 111 is vertically through the mounting step 11. A workpiece placement groove A12 is provided in the middle of the upper surface of the base 1 along the length direction. The workpiece placement groove A12 corresponds to the rear end structure of the workpiece 6. Mounting grooves 13 are symmetrically provided on both sides of the workpiece placement groove A12. A connecting hole is provided at the bottom of the mounting groove 13.

[0028] The limiting plate 2 has an n-shaped structure. The lower side of the limiting plate 2 has a groove A21 that matches the shape of the workpiece 6. The limiting plate 2 is set on the base 1 across the workpiece placement groove A12. The limiting plate 2 has countersunk holes corresponding to the connecting holes on the base 1. Screws pass through the countersunk holes and are set in the connecting holes to fix the limiting plate 2 on the base 1 and press the rear end of the workpiece 6.

[0029] The rear end of the main shaft 3 is set as a semi-circle to match the corner of the mounting step 11. A rotating shaft 31 is provided on the lower side of the rear end of the main shaft 3. A threaded hole is provided at the center of the lower end of the rotating shaft 31. A washer is provided on the lower side of the mounting hole 111 of the base 1. The screw passes through the washer and is set in the threaded hole of the rotating shaft 31, so that the main shaft 3 is rotated and mounted on the base 1. A workpiece placement groove B32 is provided on the upper surface of the main shaft 3, which corresponds to and is connected to the workpiece placement groove A12. The workpiece placement groove B32 corresponds to the front end structure of the workpiece 6.

[0030] The rear end of the small shaft 4 is provided with a stepped bending forming part 41, which is positioned corresponding to the workpiece placement groove B32. The outer edge of the bending forming part 41 is an arc shape that matches the arc size of the workpiece 6 at the bend. A square positioning protrusion 42 is provided on the lower side of the bending forming part 41. A small shaft positioning groove 33 that matches the positioning protrusion 42 is provided on one side of the workpiece placement groove B32 on the large shaft 3. The positioning protrusion 42 is located in the small shaft positioning groove 33. The front end of the small shaft 4 is fixed to the large shaft 3 by screws.

[0031] The lower rear side of the pressure block 5 is provided with a groove B52 corresponding to the structure of the workpiece placement groove B32. The pressure block 5 is set on the main shaft 3 corresponding to the workpiece placement groove B32. The lower front side of the pressure block 5 is provided with a protrusion 51. The main shaft 3 is provided with a corresponding connecting groove 34. The bottom of the connecting groove 34 is provided with a screw hole. The screw passes through the screw hole of the front end of the pressure block 5 set in the main shaft 3 to fix the pressure block 5 on the main shaft 3 and press the front end of the workpiece 6 tightly.

[0032] This utility model relates to a precision bending fixture for molybdenum filament rods. In the initial state, the direction of the main shaft 3 is aligned with that of the base 1. The workpiece 6 to be bent is placed in the workpiece placement groove A12 of the base 1, with the front end of the workpiece 6 located in the workpiece placement groove B32 on the main shaft 3. First, the limiting plate 2 is fastened onto the base 1 and fixed with screws to press the rear end of the workpiece 6. Then, the small shaft 4 and the pressure block 5 are fixed onto the main shaft 3 with screws. The bending forming part 41 of the small shaft 4 contacts the workpiece 6, and the stepped edge of the bending forming part 41 presses against the workpiece 6, limiting the bending part of the workpiece 6. The pressure block 5 limits the front end of the workpiece 6 through the groove B on its lower side. After the workpiece 6 is fixed, an external force is applied to the outer side of the front end of the main shaft 3, rotating the main shaft 3 counterclockwise by 90 degrees. Under the arc-shaped reaction force of the bending forming part 41 at the front end of the small shaft 4, the workpiece 6 is successfully bent into shape.

[0033] The parts of this utility model not described in detail are existing technologies.

[0034] The embodiments selected herein for the purpose of disclosing the inventive objectives of this utility model are currently considered appropriate; however, it should be understood that this utility model is intended to include all variations and modifications of the embodiments that fall within the scope of this concept and utility model.

Claims

1. A precision bending fixture for a long molybdenum filament rod, characterized in that: Includes base, limit plate, large shaft, small shaft and pressure block; The base is a rectangular block structure. A right-angle mounting step is formed by a missing corner at the front end of the base. The corner of the mounting step is rounded. A workpiece placement groove A is provided in the middle of the upper surface of the base along the length direction. The workpiece placement groove A corresponds to the structure at the rear end of the workpiece. The limiting plate has an n-shaped structure, and a groove A matching the shape of the workpiece is provided in the middle of the lower side of the limiting plate. The limiting plate is set on the base across the workpiece placement groove A. The main shaft is rotatably mounted on the mounting step of the base. The rear end of the main shaft is set as a semi-circle that matches the corner of the mounting step. The upper surface of the main shaft is provided with a workpiece placement groove B that corresponds to and is connected to the workpiece placement groove A. The workpiece placement groove B corresponds to the front end structure of the workpiece. The rear end of the small shaft is provided with a stepped bending forming part, which is corresponding to the workpiece placement groove B. The outer edge of the bending forming part is an arc shape that matches the arc size of the workpiece bending point. The front end of the small shaft is fixed to the large shaft with screws. The lower side of the rear end of the pressure block is provided with a groove B corresponding to the workpiece placement groove B structure, and the pressure block is set on the main shaft corresponding to the workpiece placement groove B.

2. The precision bending fixture for molybdenum filament rods according to claim 1, characterized in that: The base mounting step has a vertically penetrating mounting hole, and a washer is provided on the lower side of the mounting hole. A rotating shaft is provided on the lower side of the rear end of the main shaft, and a threaded hole is provided at the center of the lower end of the rotating shaft. A screw passes through the washer and is placed in the threaded hole of the rotating shaft, so that the main shaft can be rotated and mounted on the base.

3. The precision bending fixture for molybdenum filament rods according to claim 1, characterized in that: The base has symmetrical mounting slots on both sides of the workpiece placement slot A. The bottom of the mounting slot has a connecting hole. The limiting plate has countersunk holes corresponding to the connecting holes. Screws pass through the countersunk holes and are placed in the connecting holes to fix the limiting plate on the base and press the rear end of the workpiece.

4. The precision bending fixture for molybdenum filament rods according to claim 1, characterized in that: A square positioning protrusion is provided on the lower side of the bending and forming part of the small shaft, and a small shaft positioning groove matching the positioning protrusion is provided on one side of the workpiece placement groove B on the large shaft, with the positioning protrusion located inside the small shaft positioning groove.

5. The precision bending fixture for molybdenum filament rods according to claim 1, characterized in that: The pressure block has a protrusion on its lower front end, and a corresponding connecting groove is provided on the main shaft. A screw hole is provided at the bottom of the connecting groove. The screw passes through the front end of the pressure block and is placed in the screw hole of the main shaft to fix the pressure block on the main shaft and press the front end of the workpiece tightly.

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