A machining fixture for machining ultra-thin disc springs

Abstract

The present invention relates to the technical field of butterfly spring processing, specifically to a machine processing fixture for processing ultra-thin butterfly springs, including a mounting seat, a placement groove is provided on the mounting seat, a receiving groove is provided on the placement groove, an electric push rod is fixedly connected in the receiving groove, the extended end of the electric push rod is fixedly connected to a guide column, the bottom end of the guide column is provided with a lifting module, the movable end of the lifting module is provided with a guide cone, and the top surface of the guide cone is an inclined surface. The structure of the present invention has a small contact area with the upper surface of the ring, and can fix raw materials with different inner diameters. Since the upper surface of the ring is mainly polished during processing, by reducing the contact area with the upper surface of the ring, it is possible to increase the operating space of the processing equipment and reduce the problem of the processing equipment accidentally touching the fixing fixture equipment, resulting in insufficient processing accuracy and damage to the fixing fixture.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly spring processing, in particular to a machining fixture for processing ultra-thin butterfly springs. Background Art

[0002] As a basic part of mechanical equipment, springs are used in many fields of modern industry, especially in the machinery industry, railway industry, construction industry and nuclear power industry. The demand for disc spring devices is also increasing. When machining disc springs thicker than 7mm at home and abroad, it is generally clamped by a fixture to directly turn the blank into annular thin sheets, and then make it into a conical blank. When the thickness of the disc spring is less than 7mm, the disc spring with a thickness of less than 7mm made by the lathe universal fixture clamping the blank is easy to deform, especially when processing and making disc springs for ball valve preload with a thickness of less than 2mm; the disc springs used for ball valve preload are characterized by many types of each model but very few of each model, generally only a few pieces, which is not suitable for mass production and batch preparation of raw materials of suitable thickness. Generally, raw materials with thicker inventory (relative to the thickness of the ultra-thin disc springs) are used, and then processed to the required thickness in the machining link, which has high processing costs. Due to its relatively thin thickness, it is not suitable to use a lathe equipped with a universal fixture for direct processing during its machining process;

[0003] At the same time, since the material used to make disc springs cannot be magnetized and cannot attract the blanks for making disc springs, it is not suitable to use ordinary grinders for processing; in summary, the processing method of ultra-thin disc springs is costly, and conventional lathe fixture configurations and processing methods make it difficult to produce ultra-thin disc springs that are not deformed and have qualified quality.

[0004] Patent No. CN205571837U discloses a fixture for machining ultra-thin disc springs, the fixture includes an upper fixture and a lower fixture, the upper fixture is convex, the upper fixture is formed integrally by two coaxial cylinders of different diameters, a groove is provided in the middle of the surface of the lower fixture, the groove is circular; the diameter of the cylinder at the upper end of the upper fixture is smaller than the diameter of the cylinder at its bottom end; the diameter of the cylinder at the bottom end of the upper fixture is smaller than the diameter of the groove in the middle of the surface of the lower fixture. The utility model first cuts the square plate into a ring, turns the disc into a convex disc, and then cuts the convex disc into a ring, ensuring that the manufactured ring is not deformed, and has low production cost, good quality, high efficiency, and very important market value;

[0005] However, when this structure is fixed, the contact area with the ring is large, and when performing processing operations such as grinding and cutting, the operating space is small, which may accidentally touch the fixture equipment, resulting in problems with lead processing accuracy and damage to the fixture.

[0006] Therefore, a machining fixture for machining ultra-thin disc springs is proposed. Summary of the invention

[0007] The object of the present invention is to provide a machining fixture for machining ultra-thin disc springs to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a machine processing fixture for processing ultra-thin disc springs, comprising a mounting seat, a connecting ear fixedly connected to the mounting seat, a placement slot provided on the mounting seat, a receiving slot provided on the placement slot, an electric push rod fixedly connected in the receiving slot, an extending end of the electric push rod fixedly connected to a guide column, a lifting module provided at the bottom end of the guide column, a guide cone provided at the movable end of the lifting module, a top surface of the guide cone being an inclined surface, a plurality of groups of first sliding grooves evenly provided in the outer wall of the guide column in an annular direction, an extrusion plate slidably connected in the first sliding groove, a connecting rod fixedly connected to the side of the extrusion plate close to the guide cone, a slider fixedly connected to one end of the connecting rod, the inclined surface of the slider is parallel to and fits with the inclined surface of the guide cone, and a spring is provided between the slider and the mounting seat.

[0009] Preferably, the lifting module includes a lifting cavity opened inside the guide column, the guide cone is slidably connected to the inner wall of the lifting cavity, the lower surface of the guide column is fixedly connected to a motor, the output end of the motor is fixedly connected to a threaded rod, the threaded rod is rotatably connected to the lifting cavity, and the guide cone is threadedly connected to the threaded rod.

[0010] Preferably, a corner is provided in the lifting chamber, and a slot adapted to the corner is provided on the guide cone, and the slot is slidably connected to the corner.

[0011] Preferably, a second slide groove is provided outside the guide column and below the first slide groove. A positioning plate is slidably connected in the second slide groove, a through groove is provided in the guide column, a telescopic rod is fixedly connected to one side of the positioning plate, the telescopic rod slides in the through groove, an operating groove is provided in the guide column, one end of the telescopic rod extends into the operating groove, and a rotating rod is rotatably connected between one end of the telescopic rod and the guide cone.

[0012] Preferably, a positioning rod is slidably connected inside the guide column, and one end of the positioning rod is fixedly connected to the positioning plate.

[0013] Preferably, the telescopic rod comprises a fixed tube, a limiting plate is slidably connected inside the fixed tube, a second spring is provided between the limiting plate and the inner wall of the fixed tube, and an extension tube is fixedly connected to one side of the limiting plate.

[0014] Preferably, the receiving groove includes a first groove, a second groove and a third groove.

[0015] Preferably, the first groove is used to receive the guide column, and the radius of the first groove is greater than the radius of the positioning plate on the guide column when it is in an extended state.

[0016] Preferably, the second groove is used to accommodate the electric push rod, and the length of the second groove is greater than the length of the electric push rod in a retracted state.

[0017] Preferably, the third groove is used to accommodate the motor.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The structure of the present invention has a small contact area with the upper surface of the ring and can fix raw materials with different inner diameters. Since the upper surface of the ring is mainly polished during processing, by reducing the contact area with the upper surface of the ring, it is possible to increase the operating space of the processing equipment and reduce the problem of the processing equipment accidentally touching the fixing fixture equipment, resulting in insufficient processing accuracy and damage to the fixing fixture.

[0020] The present invention drives the rotating rod to rotate with one end of the telescopic rod as the center of the circle through the upward movement of the guide cone, thereby pushing the telescopic rod to move outward. The multiple telescopic rods will synchronously push the corresponding positioning plates to move outward. When moving outward, the positioning plates will contact the inner diameter of the ring and continue to extend outward. The positioning plates will push the ring to move so that the ring is located in the center of the placement groove, thereby achieving a positioning effect. There is no need for an operator to perform positioning, and the processing accuracy is improved through automatic positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural cross-sectional view of the present invention;

[0023] Figure 3 It is a structural cross-sectional view of the guide column of the present invention;

[0024] Figure 4 It is a structural cross-sectional view of the guide column of the present invention;

[0025] Figure 5 For the present invention Figure 4 A magnified view of the structure at center.

[0026] Figure 6 For the present invention Figure 4 A magnified view of the structure at point B.

[0027] Figure 7 It is a structural cross-sectional view of the telescopic rod of the present invention.

[0028] In the figure: 1. mounting base; 101. connecting ear; 11. placement slot; 2. storage slot; 21. first groove; 22. second groove; 23. third groove; 3. electric push rod; 4. guide column; 401. motor; 402. lifting chamber; 403. threaded rod; 404. guide cone; 405. first slide slot; 406. extrusion plate; 407. connecting rod; 408. slider; 409. spring; 411. corner; 412. slot; 421. second slide slot; 422. positioning plate; 423. through slot; 424. telescopic rod; 4241. fixing tube; 4242. limit plate; 4243. second spring; 4244. extension tube; 425. operation slot; 426. rotating rod; 427. positioning rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 7 , the present invention provides a technical solution:

[0031] A machining fixture for machining ultra-thin disc springs, such as Figures 1 to 4 and Figure 6 As shown, it includes a mounting seat 1, a connecting ear 101 is fixedly connected to the mounting seat 1, a placement groove 11 is provided on the mounting seat 1, a receiving groove 2 is provided on the placement groove 11, an electric push rod 3 is fixedly connected in the receiving groove 2, an extended end of the electric push rod 3 is fixedly connected to a guide column 4, a lifting module is provided at the bottom end of the guide column 4, a guide cone 404 is provided at the movable end of the lifting module, the top surface of the guide cone 404 is an inclined surface, a plurality of groups of first sliding grooves 405 are evenly provided on the outer wall of the guide column 4 in a circumferential direction, an extrusion plate 406 is slidably connected in the first sliding groove 405, a connecting rod 407 is fixedly connected to the side of the extrusion plate 406 close to the guide cone 404, a slider 408 is fixedly connected to one end of the connecting rod 407, the inclined surface of the slider 408 is parallel to and fits with the inclined surface of the guide cone 404, and a spring 409 is provided between the slider 408 and the mounting seat 1;

[0032] The square steel or bar steel is processed into a circular ring of a specified diameter, and the circular ring is placed in the placement groove 11. The guide column 4 passes through the inner diameter of the circular ring. By starting the electric push rod 3, the electric push rod 3 extends upward, driving the guide column 4 to move upward, ensuring that the extrusion plate 406 is located above the circular ring, and the guide cone 404 is driven to move upward by the lifting module. When the guide cone 404 moves upward, it will squeeze the slider 408 to the outside. The slider 408 and the guide cone 404 slide relative to each other, and actually move outward in the horizontal direction. When the slider 408 moves outward, the extrusion block 406 will be pushed out of the first slide groove 405 through the connecting rod 407. When the guide When the radius of the column 4 plus the extended length of the extrusion block 406 is greater than the inner diameter of the ring, the guide cone 404 stops moving. At the same time, the electric push rod 3 extends downward, driving the guide column 4 to move into the storage groove 2 until the extrusion rod 406 squeezes the ring to fix it. This structure has a small contact area with the upper surface of the ring and can fix raw materials with different inner diameters. Since the ring is mainly thinned on the upper surface during processing, by reducing the contact area with the upper surface of the ring, the operating space of the processing equipment can be increased, and the problem of the processing equipment accidentally touching the fixing fixture equipment, resulting in insufficient processing accuracy and damage to the fixing fixture, can be reduced.

[0033] As an embodiment of the present invention, Figure 3 and Figure 4 As shown, the lifting module includes a lifting cavity 402 opened inside the guide column 4, a guide cone 404 is slidably connected to the inner wall of the lifting cavity 402, a motor 401 is fixedly connected to the lower surface of the guide column 4, a threaded rod 403 is fixedly connected to the output end of the motor 401, the threaded rod 403 is rotatably connected to the lifting cavity 402, and the guide cone 404 is threadedly connected to the threaded rod 403;

[0034] The threaded rod 403 is driven to rotate by the motor 401, and the guide cone 404 is rotatably connected to the lifting chamber 402 and cannot rotate in the horizontal direction. Therefore, the threaded rod 403 can drive the guide cone 404 to move in the lifting chamber 402. A corner 411 is provided in the lifting chamber 402, and a slot 412 adapted to the corner 411 is provided on the guide cone 404. The slot 412 is slidably connected to the corner 411. The set corner 411 can provide a moving path for the guide cone 404 to prevent the guide cone 404 from shaking when it is lifted or lowered, thereby preventing the accuracy of the fixture from being affected.

[0035] As an embodiment of the present invention, Figures 3 to 5As shown, a second slide groove 421 is provided outside the guide column 4 and below the first slide groove 405. A positioning plate 422 is slidably connected in the second slide groove 421, a through groove 423 is provided in the guide column 4, a telescopic rod 424 is fixedly connected to one side of the positioning plate 422, the telescopic rod 424 slides in the through groove 423, an operating groove 425 is provided in the guide column 4, one end of the telescopic rod 424 extends into the operating groove 425, a rotating rod 426 is rotatably connected between one end of the telescopic rod 424 and the guide cone 404, a positioning rod 427 is slidably connected in the guide column 4, and one end of the positioning rod 427 is fixedly connected to the positioning plate 422;

[0036] The guide cone 404 moves upward, driving the rotating rod 426 to rotate with one end of the telescopic rod 424 as the center. Since the length of the rotating rod 426 is fixed and the angle between the rotating rod 426 and the horizontal direction becomes smaller, when the rotating rod 426 rotates, the telescopic rod 424 will be pushed outward to move. Multiple telescopic rods 424 will simultaneously push the corresponding positioning plates 422 to move outward. The positioning plates 422 will push the ring while moving outward. Since the rotation conditions of the rotating rod 426 are the same, the extension distances of the positioning plates 422 are the same. When moving outward, the positioning plates 422 will contact the inner diameter of the ring and continue to extend outward. The positioning plate 422 will push the ring to move so that the ring is located in the center of the placement groove 11, thereby achieving a positioning effect. There is no need for an operator to perform positioning, and the processing accuracy is improved through automatic positioning.

[0037] As an embodiment of the present invention, Figure 3 and Figure 7 As shown, the telescopic rod 424 includes a fixed tube 4241, a limit plate 4242 is slidably connected inside the fixed tube 4241, a second spring 4243 is provided between the limit plate 4242 and the inner wall of the fixed tube 4241, and an extension tube 4244 is fixedly connected to one side of the limit plate 4242;

[0038] When the ring has been pushed to the center of the placement groove 11, and the radius of the guide column 4 plus the extended length of the extrusion block 406 is smaller than the inner diameter of the ring, the guide cone 404 will continue to move upward, and the telescopic rod 424 will continue to be thrust by the rotating rod 426. Because each group of telescopic rods 424 is subject to the same external factors, when each positioning plate 422 is in contact with the inner wall of the ring, the extension tube 4244 will be pushed into the fixed tube 4241 under the thrust of the rotating top rod 426, so as to avoid affecting the fixing effect of the clamping equipment during the positioning process.

[0039] It should be noted that the storage groove 2 includes a first groove 21, a second groove 22 and a third groove 23. The first groove 21 is used to store the guide column 4, and the radius of the first groove 21 is larger than the radius of the positioning plate 422 on the guide column 4 when it is in the extended state, which can avoid affecting the fixing effect when the clamp is positioned. The second groove 22 is used to store the electric push rod 3, and the length of the second groove 22 is larger than the length of the electric push rod 3 in the retracted state. The third groove 23 is used to store the motor 401.

[0040] Working principle: Square steel or bar steel is processed into a circular ring with a specified diameter, and the circular ring is placed in the placement groove 11. The guide column 4 passes through the inner diameter of the circular ring. By starting the electric push rod 3, the electric push rod 3 extends upward, driving the guide column 4 to move upward to ensure that the extrusion plate 406 is located above the circular ring. The threaded rod 403 is driven to rotate by the motor 401, and the threaded rod 403 drives the guide cone 404 to move upward. When the guide cone 404 moves upward, it will squeeze the slider 408 to the outside. The slider 408 and the guide cone 404 slide relative to each other, and actually move outward in the horizontal direction. When the slider 408 moves outward, the extrusion block 406 will be pushed out of the first slide groove 405 through the connecting rod 407. When the radius of the guide column 4 plus the extended length of the extrusion block 406 is greater than the inner diameter of the circular ring, the guide cone 404 stops moving. At the same time, when the guide cone 404 moves upward, it drives the rotating rod 426 to move with a telescopic rod 424 The end is rotated as the center of the circle. Since the length of the rotating rod 426 is fixed, and the angle between the rotating rod 426 and the horizontal direction becomes smaller, when the rotating rod 426 rotates, the telescopic rod 424 will be pushed to move outward, and multiple telescopic rods 424 will synchronously push the corresponding positioning plates 422 to move outward. The positioning plates 422 will push the ring while moving outward. Since the rotation conditions of the rotating rod 426 are the same, the extension distances of the positioning plates 422 are the same. When moving outward, the positioning plates 422 will contact the inner diameter of the ring and continue to extend outward. The positioning plates 422 will push the ring to move so that the ring is located in the center of the placement groove 11. When the positioning is completed and the radius of the guide column 4 plus the extension length of the extrusion block 406 is greater than the inner diameter of the ring, the electric push rod 3 extends downward, driving the guide column 4 to move into the storage groove 2 until the extrusion rod 406 squeezes the ring to fix it.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A machining fixture for ultra-thin disc spring processing, characterized in that: The invention comprises a mounting seat (1), a connecting ear (101) being fixedly connected to the mounting seat (1), a placement groove (11) being provided on the mounting seat (1), a storage groove (2) being provided on the placement groove (11), an electric push rod (3) being fixedly connected in the storage groove (2), an extended end of the electric push rod (3) being fixedly connected to a guide column (4), a lifting module being provided at the bottom end of the guide column (4), a guide cone (404) being provided at the movable end of the lifting module, the top surface of the guide cone (404) being an inclined surface, The outer wall of the guide column (4) is evenly provided with a plurality of first slide grooves (405) extending in a circumferential direction, an extrusion plate (406) is slidably connected in the first slide groove (405), a connecting rod (407) is fixedly connected to the side of the extrusion plate (406) close to the guide cone (404), a slider (408) is fixedly connected to one end of the connecting rod (407), an inclined surface of the slider (408) is parallel to and fits the inclined surface of the guide cone (404), and a spring (409) is provided between the slider (408) and the mounting seat (1); A second slide groove (421) is provided outside the guide column (4) and below the first slide groove (405); a positioning plate (422) is slidably connected in the second slide groove (421); a through groove (423) is provided in the guide column (4); a telescopic rod (424) is fixedly connected to one side of the positioning plate (422); the telescopic rod (424) slides in the through groove (423); an operating groove (425) is provided in the guide column (4); one end of the telescopic rod (424) extends into the operating groove (425); and a rotating rod (426) is rotatably connected between one end of the telescopic rod (424) and the guide cone (404).

2. A machining fixture for machining ultra-thin disc springs according to claim 1, characterized in that: The lifting module comprises a lifting cavity (402) opened inside the guide column (4), the guide cone (404) is slidably connected to the inner wall of the lifting cavity (402), the lower surface of the guide column (4) is fixedly connected to a motor (401), the output end of the motor (401) is fixedly connected to a threaded rod (403), the threaded rod (403) is rotatably connected to the lifting cavity (402), and the guide cone (404) is threadedly connected to the threaded rod (403).

3. A machining fixture for machining ultra-thin disc springs according to claim 2, characterized in that: A corner (411) is provided in the lifting chamber (402), and a clamping groove (412) adapted to the corner (411) is provided on the guide cone (404), and the clamping groove (412) is slidably connected to the corner (411).

4. A machining fixture for machining ultra-thin disc springs according to claim 1, characterized in that: A positioning rod (427) is slidably connected inside the guide column (4), and one end of the positioning rod (427) is fixedly connected to the positioning plate (422).

5. The machining fixture for machining ultra-thin disc springs according to claim 1, characterized in that: The telescopic rod (424) comprises a fixed tube (4241), a limiting plate (4242) being slidably connected inside the fixed tube (4241), a second spring (4243) being provided between the limiting plate (4242) and the inner wall of the fixed tube (4241), and an extension tube (4244) being fixedly connected to one side of the limiting plate (4242).

6. A machining fixture for machining ultra-thin disc springs according to claim 1, characterized in that: The receiving groove (2) comprises a first groove (21), a second groove (22) and a third groove (23).

7. A machining fixture for machining ultra-thin disc springs according to claim 6, characterized in that: The first groove (21) is used to receive the guide column (4), and the radius of the first groove (21) is greater than the radius of the positioning plate (422) on the guide column (4) when it is in an extended state.

8. The machining fixture for machining ultra-thin disc springs according to claim 6, characterized in that: The second groove (22) is used to accommodate the electric push rod (3), and the length of the second groove (22) is greater than the length of the electric push rod (3) in a retracted state.

9. A machining fixture for machining ultra-thin disc springs according to claim 6, characterized in that: The third groove (23) is used to accommodate the motor (401).

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