Linear friction welding device for small eccentric wheel
By designing a small eccentric wheel linear friction welding device, which adopts an eccentric shaft and bearing structure, and combines mechanical transmission and hydraulic welding, the problem of shortened equipment life and reduced accuracy caused by friction loss in eccentric wheel or cam structures is solved, achieving efficient and low-cost welding results.
Patent Information
- Application Number
- CN202520141436.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing eccentric wheel or cam structures suffer from severe frictional wear over long periods of use, leading to shortened equipment lifespan, decreased working accuracy, and high maintenance costs.
A small eccentric wheel linear friction welding device is designed, which adopts an eccentric shaft combined with three bearings. The counterweight balances the inertial force, and the low friction characteristics of the bearings are utilized. Combined with mechanical transmission and hydraulic welding components, a stable vibration frequency and precise welding are achieved.
Extend equipment lifespan, improve working accuracy, reduce maintenance costs, simplify maintenance processes, achieve efficient and stable welding results, and adapt to different welding needs.
Smart Images
Figure CN223734081U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to linear friction welding technical field especially relates to a small eccentric wheel linear friction welding device. BACKGROUND
[0002] In the field of mechanical processing, the traditional device for realizing reciprocating motion usually depends on eccentric wheel or cam structure, and the machining precision and installation precision of main transmission parts such as shaft, gear and the like are required to be very high to ensure the stability and accuracy during operation, however, even so, these key components inevitably encounter serious friction wear problems in the long-term use, which not only shortens the service life of the device, but also leads to the gradual decline of working precision, in addition, due to the high manufacturing cost and technical threshold of high-precision parts, the overall cost of such device is expensive, and the maintenance cost cannot be ignored.
[0003] Therefore, the inventor designs a small eccentric wheel linear friction welding device to solve the above problems. UTILITY MODEL CONTENTS
[0004] In view of the defects of the prior art, the utility model provides a small eccentric wheel linear friction welding device, which aims to solve the problems of shortening of service life, decline of working precision and high maintenance cost of the device caused by serious friction wear of eccentric wheel or cam structure in the prior art in long-term use.
[0005] To achieve the above purpose, the technical scheme adopted by the utility model is: a small eccentric wheel linear friction welding device, comprising a welding base, the welding base is provided with a driving part and a linear welding part, the linear welding part is provided with a welding table, a linear friction assembly is arranged on the welding table, an eccentric driving assembly is arranged on the driving part, the eccentric driving assembly comprises a main shaft box, three bearings, an eccentric shaft, a connecting rod and two counterweights which are respectively located on both sides of the connecting rod and are sleeved on the eccentric shaft, wherein the main shaft box is adapted to be installed on the eccentric shaft through two bearings on both sides of the main shaft box, another bearing is sleeved on the middle part of the eccentric shaft, one end of the connecting rod is sleeved on the bearing in the middle part of the eccentric shaft, and the other end of the connecting rod is hinged to a clamp mounting plate of the linear friction assembly.
[0006] Based on the above, the small eccentric wheel linear friction welding device has the beneficial effects of solving the problems of shortening of service life, decline of working precision and high maintenance cost of the device caused by serious friction wear of eccentric wheel or cam structure in the prior art in long-term use, mainly embodied in:
[0007] 1. The utility model discloses a design of eccentric shaft combined with three bearings, that is, one bearing on each side of the main shaft box and one bearing in the middle of the eccentric shaft, realizes small range reciprocating vibration, significantly enhances the strength of the transmission part, in addition, installs counterweight on the eccentric shaft to balance the inertial force of the mechanism itself, ensures the stability and reliability of the equipment operation, greatly improves the working accuracy.
[0008] 2. The utility model discloses a bearing at the connecting place of eccentric shaft and connecting rod, effectively reduces the wear and tear of relative motion between two components through the low friction characteristics of bearing, not only prolongs the service life of equipment, but also simplifies the maintenance process and reduces the cost of long-term use.
[0009] 3. The utility model discloses a mechanical transmission mode, can provide stable and adjustable vibration frequency (10-70Hz) efficiently, can flexibly adjust the vibration frequency in the welding process through the method of changing the speed of external motor, makes the process debugging more convenient and fast, adapts to different welding needs.
[0010] Further, the main shaft box comprises an upper box body and a lower box body, upper bearing grooves are arranged inside the lower ends of both sides of the upper box body, upper locking tables are arranged outside the upper box body, lower bearing grooves are arranged inside the upper ends of both sides of the lower box body, lower locking tables are arranged outside the lower box body, the bearings are fitted and installed in the upper bearing grooves and the lower bearing grooves, a box body locking piece is arranged between the upper locking table and the lower locking table, the eccentric shaft penetrates from one side of the box body locking piece and is rotationally fitted on the other side of the box body locking piece.
[0011] Based on the above, the beneficial effects of the design of the upper box body and the lower box body are that the installation and replacement of the bearings and the eccentric shaft are more convenient, when the components need to be overhauled or replaced, the whole driving assembly does not need to be disassembled, and the maintenance process can be greatly simplified by only opening the upper box body; the beneficial effects of the upper bearing grooves and the lower bearing grooves are that they are used for accurately fitting and installing the bearings, so that the eccentric shaft can stably rotate in the correct position, and the problem of unstable operation caused by assembly errors is reduced; the beneficial effects of the box body locking piece are that the upper box body and the lower box body are fixed, a stable support point is provided for the eccentric shaft, displacement or loosening phenomena that may occur in the high-speed running process of the eccentric shaft are effectively prevented, and the safety and reliability of the equipment operation are ensured.
[0012] Further, one end of the eccentric shaft is connected with the output end of the external motor.
[0013] Further, the linear friction assembly further comprises two slide rails, a plurality of sliding blocks that are slidingly fitted on the two slide rails respectively, and mounting pads that are correspondingly arranged on each sliding block, a plurality of the mounting pads are fixedly installed on the clamp mounting plate, and a product clamp is arranged on the clamp mounting plate.
[0014] Based on the above, the beneficial effects of the two slide rails are to provide stable guidance for the sliding block and the mounting pad, so that the clamp mounting plate and the product clamp thereon can move along an accurate straight line path, not only improving the positioning accuracy during the welding process, but also ensuring the smoothness of the movement and reducing the welding quality problems caused by deviation or shaking.
[0015] Further, the linear friction assembly is located in the external hydraulic welding assembly, and the eccentric shaft drives the clamp mounting plate to reciprocate, linearly welding the first semi-finished product on the product clamp on the second semi-finished product on the hydraulic welding assembly.
[0016] Based on the above, the beneficial effects of the hydraulic welding assembly are to provide stable pressure, combined with the accurate movement of the linear friction assembly, to achieve uniform and consistent welds, reduce welding defects, and improve product pass rate. Compared with the pneumatic pressurization method in the prior art, the utility model can easily realize the process parameters of 3-5 tons of top forging force and 10-70 Hz of vibration frequency at a relatively low cost, can complete linear friction welding of metal products with various special-shaped cross sections, and has great application and potential value.
[0017] In order to make the above features of the utility model and the purposes to be achieved more clearly, the utility model will be further described in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a perspective view of the utility model;
[0019] Figure 2 is a schematic view of the cooperation of the utility model with an external motor;
[0020] Figure 3 is a schematic view of the cooperation of the utility model with an external hydraulic welding assembly;
[0021] Figure 4 is a schematic view of the internal structure of the main shaft box of the utility model;
[0022] Figure 5 is a schematic view of the bearing installation of the utility model;
[0023] Figure 6 is a schematic view of the lower box body of the utility model;
[0024] Figure 7 is a schematic view of the upper box body of the utility model.
[0025] Explanation of reference numerals: 1-Welding base, 2-Drive unit, 3-Linear welding unit, 4-Welding table, 5-Linear friction assembly, 51-Clamp mounting plate, 511-Product clamp, 52-Slide rail, 53-Slider, 54-Mounting pad, 6-Eccentric drive assembly, 61-Spindle box, 611-Upper housing, 6111-Upper bearing groove, 6112-Upper locking platform, 612-Lower housing, 6121-Lower bearing groove, 6122-Lower locking platform, 613-Housing locking component, 62-Eccentric shaft, 63-Bearing, 64-Counterweight, 65-Connecting rod, 7-Hydraulic welding assembly, 8-External motor. Detailed Implementation
[0026] like Figures 1-7 As shown, a small eccentric wheel linear friction welding device includes a welding base 1, which is provided with a drive unit 2 and a linear welding unit 3. The linear welding unit 3 is provided with a welding table 4, and a linear friction assembly 5 is disposed on the welding table 4. An eccentric drive assembly 6 is disposed on the drive unit 2. The eccentric drive assembly 6 includes a spindle box 61, three bearings 63, an eccentric shaft 62, a connecting rod 65, and two counterweights 64 located on both sides of the connecting rod 65 and sleeved on the eccentric shaft 62. The eccentric shaft 62 is fitted on both sides of the spindle box 61 through two of the bearings 63, and the other bearing 63 is sleeved on the middle part of the eccentric shaft 62. One end of the connecting rod 65 is sleeved on the bearing 63 in the middle of the eccentric shaft 62, and the other end of the connecting rod 65 is hinged to the clamp mounting plate 51 of the linear friction assembly 5.
[0027] The spindle box 61 includes an upper box 611 and a lower box 612. The upper box 611 has an upper bearing groove 6111 inside on both sides of its lower end and an upper locking platform 6112 outside. The lower box 612 has a lower bearing groove 6121 inside on both sides of its upper end and a lower locking platform 6122 outside. The bearing 63 is installed in the upper bearing groove 6111 and the lower bearing groove 6121. A box locking member 613 is provided between the upper locking platform 6112 and the lower locking platform 6122. The eccentric shaft 62 passes through the box locking member 613 on one side and is rotatably engaged with the box locking member 613 on the other side.
[0028] One end of the eccentric shaft 62 is connected to the output end of the external motor 8.
[0029] The linear friction assembly 5 also includes two slide rails 52, four sliders 53 that are slidably fitted on the two slide rails 52 respectively, and mounting pads 54 correspondingly disposed on each slider 53. The four mounting pads 54 are used to fix the fixture mounting plate 51 together. The fixture mounting plate 51 is provided with a product fixture 511.
[0030] The linear friction assembly 5 is located in the external hydraulic welding assembly 7, and the eccentric shaft 62 drives the clamp mounting plate 51 to reciprocate, thereby linearly welding the first semi-finished product on the product clamp 511 on the second semi-finished product on the hydraulic welding assembly 7.
[0031] In summary, the specific embodiment of the utility model is as follows: first, the first semi-finished product to be welded is mounted on the product clamp 511, and the second semi-finished product is mounted in the hydraulic welding assembly 7; the external motor drives the eccentric shaft 62 to rotate; according to the characteristics of the eccentric shaft 62, the rotary motion of the eccentric shaft 62 drives the connecting rod 65 to produce linear reciprocating motion, thereby driving the high-speed movement of the first semi-finished product relative to the second semi-finished product;
[0032] The clamp mounting plate 51 in the linear friction assembly 5 is driven by the connecting rod 65 to move at high speed along the slide rail 52; the movement frequency can be flexibly adjusted according to the specific welding requirements by adjusting the rotation speed of the external motor, and is usually set to be between 10-70 Hz; with the movement of the clamp mounting plate 51, the relative movement between the first semi-finished product and the second semi-finished product generates friction heat; at the same time, the hydraulic welding assembly 7 applies stable pressure to the two semi-finished products, thereby combining the heat generated by friction to melt the surface of the materials, so as to realize the effect of linear welding.
[0033] After the welding is completed, the motor stops rotating, and the friction process is ended; at this time, the hydraulic welding assembly 7 still maintains pressure for a certain period of time to ensure that the welded area is cooled and solidified, thereby forming a firm weld.
[0034] The above description is only the optimal solution embodiment of the utility model, and is not used to limit the utility model; various modifications or replacements of the utility model made by those skilled in the art without departing from the essence and protection scope of the utility model should be within the protection scope of the utility model.
Claims
1. A compact eccentric wheel linear friction welding device comprising a welding base (1), characterized in that: The welding base (1) is provided with a driving part (2) and a linear welding part (3), the linear welding part (3) is provided with a welding table (4), the welding table (4) is provided with a linear friction assembly (5), the driving part (2) is provided with an eccentric driving assembly (6), the eccentric driving assembly (6) comprises a main shaft box (61), three bearings (63), an eccentric shaft (62), a connecting rod (65) and two counterweights (64) which are respectively located on both sides of the connecting rod (65) and are sleeved on the eccentric shaft (62), wherein the main shaft box (61) is adapted and installed on both sides of the eccentric shaft (62) through two bearings (63), another bearing (63) is sleeved on the middle part of the eccentric shaft (62), one end of the connecting rod (65) is sleeved on the bearing (63) in the middle part of the eccentric shaft (62), and the other end of the connecting rod (65) is hinged to the clamp mounting plate (51) of the linear friction assembly (5).
2. A compact eccentric linear friction welding device according to claim 1, characterized in that: The main shaft box (61) comprises an upper box body (611) and a lower box body (612), the inside of the lower end of the upper box body (611) is provided with an upper bearing groove (6111), and the outside is provided with an upper locking table (6112), the inside of the upper end of the lower box body (612) is provided with a lower bearing groove (6121), and the outside is provided with a lower locking table (6122), the bearings (63) are matched and installed in the upper bearing groove (6111) and the lower bearing groove (6121), and the box locking piece (613) is arranged between the upper locking table (6112) and the lower locking table (6122), and the eccentric shaft (62) penetrates from one side of the box locking piece (613) and is rotationally fitted on the other side of the box locking piece (613).
3. A compact eccentric linear friction welding apparatus according to claim 2, wherein: One end of the eccentric shaft (62) is connected with the output end of an external motor (8).
4. A compact eccentric linear friction welding device as claimed in claim 1, wherein: The linear friction assembly (5) further comprises two slide rails (52), a plurality of sliding blocks (53) which are slidingly fitted on the two slide rails (52), and a mounting pad (54) which is correspondingly arranged on each sliding block (53), a plurality of mounting pads (54) are fixedly installed on the clamp mounting plate (51), and the clamp mounting plate (51) is provided with a product clamp (511).
5. A compact eccentric linear friction welding apparatus as claimed in claim 4, wherein: The linear friction assembly (5) is located in an external hydraulic welding assembly (7), the eccentric shaft (62) drives the clamp mounting plate (51) to reciprocate, and a first semi-finished product located on the product clamp (511) is linearly welded on a second semi-finished product on the hydraulic welding assembly (7).