Active magnetic clamping structure for friction welding

Abstract

The utility model relates to an active magnetic clamping structure for friction welding. The active magnetic clamping structure comprises a main shaft end, according to the main shaft end, a plurality of circumferential or axial magnetic bar sets are embedded in a four-piece type elastic connector, and the four-piece type elastic connector is connected with a main shaft coupler through fastening bolts; according to the sliding table end, a base body V-shaped block is connected with a sliding table through a fastening bolt and connected with a magnetic gasket through a quick-change connector, and a neodymium iron boron magnetic sheet is embedded into the surface of the magnetic gasket. The second stress sensing patch is arranged between the magnetic gasket and the base body V-shaped block; according to the sliding table end, the base body V-shaped block is combined with the magnetic gasket, rapid replacement of gaskets of different models and self-centering of workpieces are supported, the clamping state can be monitored and fed back with the assistance of a stress induction patch, and the technical problems that rigid clamping of a traditional welding structure is prone to shifting in a static state, prone to slipping under the high-rotating-speed working condition and low in model replacement efficiency are solved; and the clamping stability is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of magnetic clamping structure technology, specifically, an active magnetic clamping structure for friction welding. Background Technology

[0002] In the field of new energy vehicles, with the increasing demand for lightweighting, shaft parts often need to be hollowed out. Friction welding, as an efficient, environmentally friendly, and cost-effective process, is gradually being applied to the production of this product. Traditional friction welding uses three-jaw or other similar rigid clamping parts, which has several drawbacks: (1) When statically installing parts, the clamping position and accuracy cannot be guaranteed due to the product's weight; (2) At high welding speeds, the clamping of parts is prone to loosening and slippage, which cannot meet the increasingly stringent welding accuracy requirements; (3) Changing models requires disassembling the main shaft and the connecting bolts of the slide table tooling, and the centering time is >60 minutes / time. Therefore, this application develops an active magnetic clamping structure for friction welding, which can overcome the problems of the prior art. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an active magnetic clamping structure for friction welding.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An active magnetic clamping structure for friction welding, characterized in that it includes a spindle end;

[0006] Spindle end: A four-lobed flexible joint contains several circumferential or axial magnetic rods, which are connected to the spindle coupling by fastening bolts;

[0007] Slide end: The V-shaped block of the substrate is connected to the slide by fastening bolts, and a magnetic pad is connected through a quick-change interface. The surface of the magnetic pad is embedded with neodymium iron boron magnetic sheets; the second stress-sensing patch is set between the magnetic pad and the V-shaped block of the substrate.

[0008] A magnetic rod assembly consists of at least two magnetic rods, such as neodymium iron boron magnetic rods.

[0009] The magnetic rods are distributed at equal intervals along the circumference or axial direction of the four-lobed elastic joint.

[0010] The position of the magnetic rods in the magnetic rod assembly is adjusted through the reserved holes of the four-lobed flexible joint.

[0011] The quick-change interface features a T-shaped guide groove locking structure.

[0012] The quick-change interface allows for the replacement of magnetic pads according to different welding materials, with a replacement time of ≤1 minute.

[0013] The surface of the magnetic pad is machined with anti-slip grooves to prevent deflection during clamping, which could affect welding accuracy.

[0014] The surface of the magnetic gasket can be coated with a high-temperature resistant ceramic layer, enabling it to withstand working temperatures of ≥350℃. Alternatively, the entire magnetic gasket can be vacuum nitrided to increase the surface hardness to 56-62HRC, thereby extending the service life of the magnetic gasket.

[0015] Condition monitoring unit: First stress sensing patch and second stress sensing patch are installed on the inner wall of the four-lobed elastic joint and magnetic gasket.

[0016] The first and second stress-sensing patches transmit clamping stress and pressure data from each surface to an external PLC in real time; when the clamping force weakens, an alarm can be triggered and automatic compensation can be activated.

[0017] The clamping position of the four-lobed flexible joint can be adjusted by processing according to the needs of different products and parts.

[0018] The four-lobed flexible joint, with its nested magnetic rod assembly and stress-sensing patch, improves the stability of the spindle's static and dynamic clamping and allows for real-time monitoring of the clamping condition.

[0019] The V-shaped base block is equipped with magnetic pads that can be made of different materials and specifications to fit various welding parts.

[0020] Compared with the prior art, the positive effects of this utility model are:

[0021] The active magnetic clamping structure ensures that the radial runout of the product during welding at 2500rpm is ≤0.2mm; the quick-change interface magnetic pad allows for replacement within 1 minute.

[0022] Due to the above characteristics, this invention can improve the technical problems of slippage and low tooling switching efficiency in high-speed friction welding, greatly improving product processing efficiency and reducing production energy consumption. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the spindle clamping structure of this utility model;

[0024] Figure 2 This is a three-dimensional schematic diagram of the slide clamping structure of this utility model. Detailed Implementation

[0025] The following provides a specific embodiment of an active magnetic clamping structure for friction welding according to this utility model.

[0026] Example 1

[0027] Please see the appendix Figure 1 and Figure 2An active magnetic clamping structure for friction welding, including a spindle end;

[0028] Spindle end: The four-lobed flexible joint 102 contains several circumferential or axial magnetic rod groups 103, which are connected to the spindle coupling by fastening bolts 101;

[0029] Slide end: The base V-block 202 is connected to the slide by fastening bolts 201 and a magnetic pad 203 is connected by a quick-change interface. Neodymium iron boron magnets 206 are embedded on the surface of the magnetic pad 203. The second stress-sensing patch 204 is disposed between the magnetic pad 203 and the base V-block 202.

[0030] The magnetic rod assembly 103 consists of at least two magnetic rods, such as neodymium iron boron magnetic rods.

[0031] The magnetic rod group 103 is equidistantly distributed along the circumference or axial direction of the four-lobed elastic joint 102.

[0032] The position of the magnetic rods in the magnetic rod assembly 103 is adjusted by the reserved holes in the four-lobed elastic joint 102.

[0033] The quick-change interface features a T-shaped guide groove locking structure.

[0034] The quick-change interface allows for the replacement of the magnetic pad 203 according to different welding materials, with a replacement time of ≤1 minute.

[0035] The surface of the magnetic pad 203 is machined with anti-slip grooves to prevent deflection during clamping and thus maintain welding accuracy.

[0036] The surface of the magnetic pad 203 can be covered with a high-temperature resistant ceramic layer 205, which can withstand the working temperature of ≥350℃. Alternatively, the entire magnetic pad 203 can be vacuum nitrided to increase the surface hardness of the working surface to 56-62HRC and improve the service life of the magnetic pad 203.

[0037] Status monitoring unit: First stress sensing patch 104 and second stress sensing patch 204 are provided on the inner wall of the four-lobed elastic joint 102 and magnetic gasket 203;

[0038] The first stress-sensing patch 104 and the second stress-sensing patch 204 transmit clamping stress and pressure data from each surface to an external PLC in real time; when the clamping force weakens, an alarm can be triggered and automatic compensation can be activated.

[0039] The spindle-end four-lobed elastic joint 102 contains several circumferential or axial magnetic rod assemblies 103, which are connected to the spindle coupling via fastening bolts 101. The position of the magnetic rod assemblies 103 is adjusted through pre-drilled holes to ensure tight clamping between the four-lobed elastic joint 102 and the workpiece. The slide-end base V-block 202 has a T-slot. Magnetic pads 203 are pushed into the base V-block 201 along the T-slot and connected to the slide via fastening bolts 201. After welding begins, when the first stress-sensing patch 104 and the second stress-sensing patch 204, located in the four-lobed elastic joint 102 and the magnetic pads 203, detect a decrease in clamping force, the PLC controls the hydraulic system to compensate.

[0040] The slide end of this application combines a base V-block 202 with a magnetic pad, which supports quick replacement of different types of pads and workpiece self-centering. It can also be supplemented with stress-sensing patches to monitor and provide feedback on the clamping status, solving the technical problems of traditional welded structure rigid clamping being prone to static displacement, slipping under high-speed conditions, and low changeover efficiency, thus significantly improving clamping stability.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An active magnetic clamping structure for friction welding, characterized in that, Including the spindle end; Spindle end: A four-lobed flexible joint (102) contains several circumferential or axial magnetic rod groups (103) which are connected to the spindle coupling by fastening bolts (101); Slide end: The base V-block (202) is connected to the slide by fastening bolts (201) and a magnetic pad (203) is connected by a quick-change interface. Neodymium iron boron magnetic sheets (206) are embedded on the surface of the magnetic pad (203); a second stress-sensitive patch (204) is set between the magnetic pad (203) and the base V-block (202).

2. The active magnetic clamping structure for friction welding as described in claim 1, characterized in that, The magnetic rod assembly (103) consists of at least two magnetic rods, such as neodymium iron boron magnetic rods.

3. The active magnetic clamping structure for friction welding as described in claim 1, characterized in that, The magnetic rod group (103) is equidistantly distributed circumferentially or axially along the four-lobed elastic joint (102).

4. The active magnetic clamping structure for friction welding as described in claim 1, characterized in that, The position of the magnetic rods in the magnetic rod assembly (103) is adjusted by the reserved holes in the four-lobed elastic joint (102).

5. The active magnetic clamping structure for friction welding as described in claim 1, characterized in that, The quick-change interface features a T-shaped guide groove locking structure.

6. The active magnetic clamping structure for friction welding as described in claim 1, characterized in that, The changeover time for quick-switch interfaces is ≤1 minute.

7. The active magnetic clamping structure for friction welding as described in claim 1, characterized in that, The surface of the magnetic pad (203) is machined with anti-slip grooves.

8. The active magnetic clamping structure for friction welding as described in claim 1, characterized in that, The surface of the magnetic pad (203) may be covered with a high-temperature resistant ceramic layer (205) to withstand operating temperatures of ≥350℃.

9. The active magnetic clamping structure for friction welding as described in claim 1, characterized in that, The surface hardness of the working surface of the magnetic pad (203) reaches 56-62 HRC.

10. The active magnetic clamping structure for friction welding as described in claim 1, characterized in that, Status monitoring unit: a first stress-sensing patch (104) and a second stress-sensing patch (204) are provided on the inner wall of the four-lobed elastic joint (102) and the magnetic gasket (203). The first stress-sensing patch (104) and the second stress-sensing patch (204) transmit the clamping stress and pressure data of each surface to the external PLC in real time; when the clamping force decreases, an alarm is triggered and automatic compensation is activated.

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