CN110947819B - Eccentric displacement adjustable bar material rotary blanking system - Google Patents
Eccentric displacement adjustable bar material rotary blanking system Download PDFInfo
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- CN110947819B CN110947819B CN201811130994.3A CN201811130994A CN110947819B CN 110947819 B CN110947819 B CN 110947819B CN 201811130994 A CN201811130994 A CN 201811130994A CN 110947819 B CN110947819 B CN 110947819B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/002—Drive of the tools
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Abstract
The invention belongs to the technical field of low-stress fatigue blanking, and particularly relates to a rotary blanking system for a bar with adjustable eccentric displacement, which solves the problems of uneven circumferential load loading of the bar and incapability of adjusting the length of the bar, and comprises a base, and an eccentric displacement loading assembly and a blanking driving assembly which are arranged on the base; the eccentric displacement loading assembly comprises a first driving device, a first transmission device, a linear guide rail pair, a first bearing support seat and a first clamping device; the first driving device drives the first transmission device to move, the transmission device is fixedly connected with the sliding block, and the first bearing supporting seat is fixed on the sliding block; the blanking driving assembly comprises a moving table, a second driving device, a second transmission device, a second bearing supporting seat and a second clamping device, wherein the second driving device, the second transmission device, the second bearing supporting seat and the second clamping device are arranged on the moving table; the second driving device drives the second transmission device to rotate, and the second transmission device drives the second clamping device to rotate.
Description
Technical Field
The invention belongs to the technical field of low-stress fatigue blanking, and particularly relates to a rotary blanking system for a bar with adjustable eccentric displacement.
Background
The low stress fatigue blanking is a novel blanking process based on low cycle fatigue fracture. The low stress fatigue blanking experiment table is an experiment device for researching low stress fatigue blanking of materials, and the device has the main function of realizing fatigue loading of pipe materials or bar materials. The fatigue loading of the current laboratory bench on materials is mainly carried out by two ways: firstly, directly applying load to the material; the second is to apply an eccentric displacement to the material.
The experimental device for directly applying load to materials adopts a circumferential hammering type blanking experimental bench at present: the fatigue load is applied by arranging a plurality of hammers around the bar or pipe and hammering the bar or pipe continuously, and the experimental bench has the following defects: the load size can not be adjusted, the loading frequency is lower, and the blanking efficiency is lower.
The experimental device for applying eccentric displacement to materials adopts an eccentric rotary blanking experimental bench at present: one end of the bar is clamped, the other end of the bar is eccentrically displaced through the die, and then the die is rotated to apply fatigue load, which is more efficient than a hammering type blanking method.
However, the experimental device loaded by eccentric displacement has the following disadvantages: because the relative position of the die and the pipe clamp is fixed, the fatigue load of the die and the pipe clamp cannot be adjusted, the circumferential load of the bar is uneven, and the blanking length cannot be adjusted.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a rotary blanking system for bars with adjustable eccentric displacement, which realizes uniform loading of circumferential load of the bars and adjustable length of the bars on the premise of ensuring blanking efficiency.
The technical scheme for solving the problems is as follows: the utility model provides a rotatory unloading system of bar of eccentric displacement adjustable which characterized in that:
the device comprises a base, and an eccentric displacement loading assembly and a blanking driving assembly which are arranged on the base;
the eccentric displacement loading assembly comprises a first driving device, a first transmission device, a linear guide rail pair, a first bearing supporting seat and a first clamping device; the linear guide rail pair comprises a linear guide rail and a sliding block capable of sliding on the linear guide rail;
the first driving device and the linear guide rail are arranged on the base, the first driving device drives the first transmission device to move, the transmission device is fixedly connected with the sliding block, the first bearing supporting seat is fixed on the sliding block, and the first clamping device is fixed on the first bearing supporting seat through a first bearing;
the blanking driving assembly comprises a moving table, a second driving device, a second transmission device, a second bearing supporting seat and a second clamping device, wherein the second driving device, the second transmission device, the second bearing supporting seat and the second clamping device are arranged on the moving table; the second clamping device is fixed on the second bearing supporting seat through a second bearing, the second driving device is connected with the second transmission device, the second clamping device is connected with the second transmission device, and the second clamping device is arranged corresponding to the first clamping device;
the second driving device drives the second transmission device to rotate, and the second transmission device drives the second clamping device to rotate.
Further, above-mentioned first transmission includes ball and with ball complex screw nut, ball is connected with first drive arrangement, and screw nut is connected with first bearing supporting seat.
Furthermore, a first flange is arranged in the first bearing, a first clamping device is fixed on the first flange, and the first clamping device is a three-jaw chuck.
Furthermore, a second flange is arranged in the second bearing, a second clamping device is fixed on the second flange, and the second clamping device is a three-jaw chuck;
the second transmission device comprises a main shaft, a third bearing supporting seat is arranged on the mobile station, the main shaft is fixed on the third bearing supporting seat through a third bearing, one end of the main shaft is connected with the second driving device, and the other end of the main shaft is connected with the second flange.
Furthermore, a T-shaped groove is formed in the base, and a T-shaped groove bolt matched with the T-shaped groove is arranged on the movable table.
Further, the ball screw is connected with a first driving device through a first coupling; the second transmission device is connected with the second driving device through a second coupler.
Furthermore, the first transmission device and the second driving device are both servo motors.
Further, the first bearing and the second bearing are both cylindrical roller bearings.
Further, the third bearing is a deep groove ball bearing.
The invention has the advantages that:
according to the eccentric displacement adjustable bar rotating blanking system, the eccentric displacement loading assembly controls the magnitude of eccentric displacement loading through the first driving device, the ball screw and the linear guide rail pair, so that the fatigue load can be adjusted, and the load loaded on the circumferential direction of a bar is uniform; the rotating speed and the rotating cycle number of the blanking driving assembly can be controlled by a second driving device, so that the loading frequency and the loading cycle number can be controlled; the blanking driving component can move on the base, so that the blanking length is adjustable; the first driving device and the second driving device both adopt servo motors, and are simple to control and high in accuracy.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a left side view of FIG. 1;
fig. 3 is a cross-sectional view taken along the line a-a in fig. 2.
Wherein, 1-ball screw; 2-a linear guide rail; 3-a first bearing support seat; 4-a first bearing; 5-a first flange; 6-a first holding device; 7-a second holding device; 8-a second flange; 9-a second bearing support seat; 10-a second bearing; 11-a second transmission; 12-a third bearing support; 13-a third bearing; 14-a second coupling; 15-a second drive; 16-a mobile station; 17-a base; 18-bar stock; 19-a first drive means; 20-a first coupling; 21-a fourth bearing support seat; 22-cushion block; 23-a lead screw nut; 24-a fifth bearing support seat; 25-a slide block; 26-T type groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1-3, fig. 1 is a schematic overall structure diagram of a rod material rotary blanking system with adjustable eccentric displacement according to an embodiment of the present invention, which includes a base 17, and an eccentric displacement loading assembly and a blanking driving assembly disposed on the base 17.
The eccentric displacement loading assembly consists of a ball screw 1, a linear guide rail 2, a sliding block 25, a first bearing support seat 3, a first bearing 4, a flange 5, a first clamping device 6, a first driving device 19 and a coupler 20.
The first driving device 19 is connected with the ball screw 1 through a first coupling 20, and the first driving device 19 is fixed on the base 17 through a motor support frame. Screw nut 23 and first bearing support 3 fixed connection, ball 1 and fourth bearing support 21 and fifth bearing support 24 fixed connection, fourth bearing support 21 and fifth bearing support 24 pass through cushion 22 and base 17 fixed connection, therefore ball 1 is fixed on base 17. The bottom of the first bearing support seat 3 is fixedly connected with a slide block 25 on the linear guide rail 2, the linear guide rail 2 is fixedly connected with the base 17, and the slide block 25 can slide on the linear guide rail 2. A first bearing 4 is arranged in the first bearing support seat 3, and the first bearing 4 is matched with the inner wall of the bearing seat 3. One end of the flange 5 is in interference fit with the inner ring of the first bearing 4, and the other end of the flange is fixedly connected with the first clamping device 6.
The blanking driving assembly consists of a second clamping device 7, a flange 8, a second bearing supporting seat 9, a second bearing 10, a second transmission device 11, a third bearing supporting seat 12, a third bearing 13, a second coupler 14, a second driving device 15 and a moving platform 16. The second driving device 15 is connected with the second transmission device 11 through a second coupling 14 and is fixedly connected with the mobile station 16 through a motor bracket. The second transmission device 11 is in interference fit with the third bearing 13, and the third bearing 13 is arranged in the third bearing support 12 and supports the second transmission device 11. The third bearing support 12 is fixedly attached to the mobile station 16. One end of the third bearing 13 is axially positioned by a shoulder of the second transmission 11. The second transmission device 11 is fixedly connected with the flange 8, and the flange 8 is fixedly connected with the second clamping device 7. The flange 8 is matched with a second bearing 10, and the second bearing 10 is arranged in a second bearing supporting seat 9 and plays a supporting role for the flange 8. The second bearing support 9 is fixedly connected to the mobile station 16. The second bearing support 9, the third bearing support 12 and the second drive means 15 are all fixedly connected to a moving table 16. The moving table 16 is provided with a T-shaped groove bolt which is matched with the T-shaped groove 26 on the base 17 and can move on the T-shaped groove 26 to drive the whole blanking driving device to move, and after the moving table moves to a required distance, the T-shaped groove bolt is screwed down to realize locking.
The first clamping device 6 is a three-jaw chuck, and the second clamping device 7 is a three-jaw chuck; the first driving device 19 and the second driving device 15 are both servo motors. The first bearing 4 and the second bearing 10 are both cylindrical roller bearings. The third bearing 13 is a deep groove ball bearing.
In the initial state of the embodiment of the invention, the first clamping device 6 and the second clamping device 7 are concentric, and the bar stock 18 is placed between the first clamping device 6 and the second clamping device 7 for clamping.
The working principle of the invention is as follows:
before blanking begins, a first clamping device 6 of the eccentric displacement loading assembly and a second clamping device 7 of the blanking driving assembly are adjusted to be concentric, the bar is placed into the first clamping device 6 and the second clamping device 7 to be clamped, then the first driving device 19 drives the eccentric loading device to move forwards (or backwards) for a certain distance and then to be locked, the first clamping device 6 and the second clamping device 7 generate an eccentric distance, the bar 18 is bent, and eccentric displacement loading is completed. The drive then rotates the rod 18 to effect cyclic eccentric loading.
Since the first clamping device 6 clamps the bar, the bar will bring the first clamping device 6 of the eccentric loading part to rotate together with the flange 5 and the inner ring of the first bearing 4. Since the first clamping device 6 and the second clamping device 7 are not concentric, the eccentric displacement loading assembly generates a compressive force on the bar 18 during rotation, which is the source of fatigue loading. The magnitude of the extrusion force can be adjusted through the sliding distance of the eccentric displacement loading assembly, so that the magnitude of the fatigue load can also be adjusted.
The direction of the fatigue load caused by eccentricity is fixed as seen throughout the system, determined by the direction of movement of the eccentric loading means, but since the bar rotates throughout the system, this fatigue load is uniformly loaded circumferentially with respect to the bar 18.
The whole blanking driving assembly can move left and right on the base 17 to change the distance between the first clamping device 6 and the second clamping device 7, thereby adjusting the length of the blanked bar or pipe.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations that are made by using the contents of the present specification and the drawings, or directly or indirectly applied to other related system fields, are included in the scope of the present invention.
Claims (9)
1. The utility model provides a rotatory unloading system of eccentric displacement adjustable bar which characterized in that:
comprises a base (17), and an eccentric displacement loading assembly and a blanking driving assembly which are arranged on the base (17);
the eccentric displacement loading assembly comprises a first driving device (19), a first transmission device, a linear guide rail pair, a first bearing support seat (3) and a first clamping device (6); the linear guide rail pair comprises a linear guide rail (2) and a sliding block (25) capable of sliding on the linear guide rail (2);
the first driving device (19) and the linear guide rail (2) are arranged on the base (17), the first driving device (19) drives the first transmission device to move, the first transmission device is fixedly connected with the sliding block (25), the first bearing supporting seat (3) is fixed on the sliding block (25), and the first clamping device (6) is fixed on the first bearing supporting seat (3) through the first bearing (4);
the blanking driving assembly comprises a moving platform (16), a second driving device (15), a second transmission device (11), a second bearing supporting seat (9) and a second clamping device (7), wherein the second driving device (15), the second transmission device, the second bearing supporting seat and the second clamping device (7) are arranged on the moving platform (16), the moving platform (16) is arranged on a base (17), and the moving platform (16) can move and lock relative to the base (17); the second clamping device (7) is fixed on the second bearing support seat (9) through a second bearing (10), a second driving device (15) is connected with a second transmission device (11), the second clamping device (7) is connected with the second transmission device (11), and the second clamping device (7) is arranged corresponding to the first clamping device (6);
the second driving device (15) drives the second transmission device (11) to rotate, and the second transmission device (11) drives the second clamping device (7) to rotate.
2. The rotary blanking system for the bar stock with the adjustable eccentric displacement, as recited in claim 1, is characterized in that: the first transmission device comprises a ball screw (1) and a screw nut (23) matched with the ball screw (1), the ball screw (1) is connected with a first driving device (19), and the screw nut (23) is connected with a first bearing support seat (3).
3. The rotary blanking system for the bar stock with the adjustable eccentric displacement as claimed in claim 2, wherein: be equipped with first flange (5) in first bearing (4), first clamping device (6) are fixed on first flange (5), and first clamping device (6) are three-jaw chuck.
4. The rotary blanking system for the bar stock with the adjustable eccentric displacement as claimed in any one of claims 1 to 3, wherein: a second flange (8) is arranged in the second bearing (10), a second clamping device (7) is fixed on the second flange (8), and the second clamping device (7) is a three-jaw chuck;
the second transmission device (11) comprises a main shaft, a third bearing supporting seat (12) is arranged on the mobile station (16), the main shaft is fixed on the third bearing supporting seat (12) through a third bearing (13), one end of the main shaft is connected with the second driving device (15), and the other end of the main shaft is connected with the second flange (8).
5. The rotary blanking system for the bar stock with the adjustable eccentric displacement as claimed in claim 4, wherein: and a T-shaped groove (26) is formed in the base (17), and a T-shaped groove bolt matched with the T-shaped groove (26) is arranged on the mobile station (16).
6. The rotary blanking system for the bar stock with the adjustable eccentric displacement as claimed in claim 5, wherein: the ball screw (1) is connected with a first driving device (19) through a first coupling (20); the second transmission device (11) is connected with a second driving device (15) through a second coupling (14).
7. The rotary blanking system for the bar stock with the adjustable eccentric displacement as claimed in claim 6, wherein: the first driving device (19) and the second driving device (15) are both servo motors.
8. The rotary blanking system for bars with adjustable eccentric displacement as claimed in claim 7, characterized in that: the first bearing (4) and the second bearing (10) are both cylindrical roller bearings.
9. The rotary blanking system for bars with adjustable eccentric displacement as claimed in claim 8, characterized in that: the third bearing (13) is a deep groove ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811130994.3A CN110947819B (en) | 2018-09-27 | 2018-09-27 | Eccentric displacement adjustable bar material rotary blanking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811130994.3A CN110947819B (en) | 2018-09-27 | 2018-09-27 | Eccentric displacement adjustable bar material rotary blanking system |
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| CN110947819A CN110947819A (en) | 2020-04-03 |
| CN110947819B true CN110947819B (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811130994.3A Active CN110947819B (en) | 2018-09-27 | 2018-09-27 | Eccentric displacement adjustable bar material rotary blanking system |
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| EP2415545A1 (en) * | 2009-03-31 | 2012-02-08 | Fuji Machine Works Co., Ltd. | Pipe cutting device and pipe cutting method |
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2018
- 2018-09-27 CN CN201811130994.3A patent/CN110947819B/en active Active
Patent Citations (8)
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| CN1040165A (en) * | 1988-08-09 | 1990-03-07 | 甘肃工业大学 | A kind of stress blank fracturing device and stress blank fracturing method thereof |
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| EP2415545A1 (en) * | 2009-03-31 | 2012-02-08 | Fuji Machine Works Co., Ltd. | Pipe cutting device and pipe cutting method |
| JP2011177878A (en) * | 2010-02-26 | 2011-09-15 | Shizuo Matsushita | Cutting method of metal rod material |
| CN102601208A (en) * | 2012-02-23 | 2012-07-25 | 西安交通大学 | Eccentric sleeve high-speed rotating type bar and tube precision blanking machine |
| CN204449466U (en) * | 2015-01-19 | 2015-07-08 | 西安交通大学 | The rotary blanking machine of fixing eccentric throw of a kind of bottom dead centre charging and hollow shaft discharging |
| CN108043946A (en) * | 2017-11-30 | 2018-05-18 | 西安理工大学 | A kind of fatigue fracture blanking machine of the motionless fatigue load circumferential direction CYCLIC LOADING of workpiece |
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