An angle-adjustable roller-like workpiece table

Abstract

The utility model relates to bearing detection technical field discloses an angle adjustable roller sample part platform, this sample part platform replaces the rotation function of traditional mechanical hand clamping jaw through the angle fine adjustment mechanism of workbench end, core includes: the V -groove of support frame sets up roller and places, one end articulates in workbench support plate, and the other end is equipped with the fine adjustment subassembly of floating support block and adjusting bolt, rotates around the hinge that the rotation bolt drives support frame, realizes the precision horizontal positioning of roller axis. For bearing roller ±2 degree cone angle tolerance, the high resolution design of preferred scheme limits the adjustment range of ±2.5 and single ring adjustment angle is less than or equal to 1.15. Its beneficial effect is: 1. eliminate the mechanical hand rotating mechanism, and the manufacturing cost of clamping jaw reduces 60%, and the failure rate reduces to below 1%; 2. realize the high accuracy adjustment of narrow range, and the horizontal positioning error is less than or equal to 0.05, and single -time adjustment time shortens to 15 seconds, solves the industry bottleneck of calibration efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of bearing manufacturing and testing technology, and in particular to an adjustable angle roller sample stage. Background Technology

[0002] In the bearing manufacturing industry, tapered rollers are key transmission components, and their geometric accuracy directly affects the bearing's load-bearing capacity and service life. After machining processes such as turning and grinding, the rollers need to undergo comprehensive inspection for dimensional tolerances and surface defects by an automated inspection unit. To ensure inspection accuracy, the production line needs to periodically calibrate the inspection equipment using standard samples. I. Existing Calibration Technology Solutions: The currently commonly used technology solution in the industry is as follows: A robotic gripper integrates a rotating shaft; during calibration, the robotic gripper picks up the tapered roller sample and delivers it to the inspection station. To accommodate rollers with different taper angles (commonly 5°-30°), the gripper needs to be designed with a rotatable joint; the rotating shaft is driven by a worm gear or servo motor; an angle sensor is configured to achieve closed-loop control. Technical drawbacks: Structural complexity increases by more than 40%, resulting in high gripper manufacturing costs (single set > ¥2,000); high failure rate of the rotating mechanism (>15%), requiring maintenance twice a month; limited angle positioning accuracy (±1° error), affecting the accuracy of inspection results. Fixed-angle calibration stage: Some production lines use a fixed-angle sample stage to place rollers, adapting the roller cone angle by changing stages with different angles. Technical drawbacks: Changeover time > 15 minutes / time, production line efficiency decreases by 30%; storing multi-angle stages occupies > 2m² of space; manual placement easily introduces positioning errors (±0.5mm). II. Fundamental Technical Problems: The above solution has two fundamental contradictions: a contradiction between precision and complexity; high-precision angle adjustment (requiring ±0.1°) relies on a complex rotating mechanism, which reduces system reliability. A contradiction between versatility and efficiency: wide-range angle adaptation (e.g., ±15°) requires sacrificing adjustment precision and speed, failing to meet the precise calibration of small cone angle deviations in bearing rollers (actual requirement ±2°).

[0003] The urgent problem to be solved is to develop a dedicated calibration fixture that can achieve rapid and precise horizontal positioning of tapered roller shafts without increasing the complexity of the robotic arm, while also possessing high reliability and low cost. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide an adjustable angle roller sample stage.

[0005] To achieve the above objectives, this utility model provides an adjustable angle roller sample stage for keeping the axis of the tapered roller horizontal. Its innovation lies in its structure, which includes: a support frame with a V-groove for placing the tapered roller; a worktable with a support plate; a hinge shaft rotatably connecting one end of the support frame to the support plate; and an angle fine-tuning mechanism located at the other end of the support frame, comprising: a lower clamping groove fixed to the support plate; an upper clamping groove on the support frame; a lower support block rotatably disposed in the lower clamping groove; an upper support block rotatably disposed in the upper clamping groove; and an adjusting bolt passing through the upper and lower support blocks. Rotating the adjusting bolt drives relative displacement between the upper and lower support blocks, causing the support frame to rotate around the hinge shaft, adjusting the inclination angle of the V-groove, and ensuring the axis of the tapered roller placed in the V-groove is horizontal.

[0006] Furthermore, the present invention also includes an end face stop, which is disposed at the end of the V-groove to restrict the axial movement of the roller.

[0007] Furthermore, this utility model also includes a through-beam sensor, with the transmitting end and receiving end of the through-beam sensor respectively located on both sides of the V-groove, used to detect whether the roller is placed in place by the state of beam obstruction.

[0008] Furthermore, the upper and lower support blocks are spherical or cylindrical structures with radii of curvature smaller than the opening radii of the upper and lower clamping grooves.

[0009] Furthermore, the aforementioned adjusting bolt is equipped with a locking nut to fix the adjusted position.

[0010] Furthermore, the angle adjustment range of the aforementioned support frame is ±2.5°, and the lead of the adjusting bolts satisfies: ;in, To adjust the single-turn lifting amount of the bolt, This is the distance from the center of the hinge axis to the center of the adjusting bolt.

[0011] The beneficial effects of this utility model are:

[0012] 1. Eliminating the rotating mechanism of the robotic arm, achieving structural simplification and cost breakthrough: By transferring the angle adjustment function from the robotic arm gripper to the worktable, the long-standing contradiction between "precision and complexity" in the industry is creatively resolved. Structural simplification: The robotic arm gripper eliminates the rotating axis and control system, reducing the number of parts by more than 60%; Cost reduction: The manufacturing cost of the gripper is reduced from ¥2,000 / set to ¥800 / set (a reduction of 60%); Reliability leap: The failure rate is reduced from >15% to <1% (maintenance cycle extended to 24 months).

[0013] 2. Breaking through the bottleneck of narrow-range precision adjustment, achieving a double leap in efficiency and accuracy. For the calibration requirements of the small cone angle deviation (±2°) of bearing rollers, we have created a pioneering ±2.5° narrow-range + high-resolution adjustment scheme: Accuracy breakthrough: Horizontal positioning error ≤0.05°, which is 20 times better than the traditional scheme (±1.0°); Efficiency leap: The single adjustment time is shortened from 120 seconds to 15 seconds, and the efficiency is improved by 8 times. Attached Figure Description

[0014] Figure 1 This is an isometric drawing of the present invention.

[0015] Figure 2 This is a structural diagram showing the connection between the lower support block and the upper support block of this utility model. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1: As Figures 1 to 2 As shown.

[0018] Core structure implementation:

[0019] Overall Structure: The adjustable angle roller sample stage includes the following core components: Support frame 1: Made of 304 stainless steel, with a 90° V-groove 11 on the top, 15mm deep and 150mm long, for placing tapered rollers. The surface of the V-groove 11 is polished to a roughness of Ra0.8μm. Worktable 2: A welded frame made of Q235 carbon steel, 400×300×100mm in size, with a table surface levelness ≤0.1mm / m. Support plate 21: Fixed to the upper part of worktable 2, 20mm thick, with a milled and smooth surface. Hinge shaft 3: The hinge shaft 3 is a Φ8mm stainless steel smooth shaft, with both ends press-fitted into the mounting holes of the support plate 21. The connecting end of the support frame 1 is equipped with a self-lubricating copper sleeve, the inner diameter of which is clearance-fitted (0.02-0.05mm) with the hinge shaft 3, forming a low-friction rotating pair. Angle fine-tuning mechanism: Located at the right end of support frame 1, including: Lower clamping groove 41: welded to the right end of support plate 21, a 12×8mm rectangular groove. Upper clamping groove 42: welded to the bottom of support frame 1, a 12×8mm rectangular groove. Lower support block 43: Ø10mm GCr15 bearing steel ball, freely placed in lower clamping groove 41. Upper support block 44: Ø10mm GCr15 bearing steel ball, freely placed in upper clamping groove 42. Adjusting bolt 45: M8 fine thread (0.5mm pitch), passing through the center hole of upper support block 44 and the center hole of lower support block 43 in sequence. Locking nut 46: installed at the end of adjusting bolt 45, used to fix the adjustment position.

[0020] Assembly method:

[0021] ① Fix the support plate 21 to the workbench 2 with bolts, with a bolt torque of 20 N·m; ② Install the hinge shaft 3 fixing seat on the left end of the support plate 21, with a positional tolerance of ±0.1 mm; ③ Connect the left end of the support frame 1 to the hinge shaft 3 through a copper sleeve, with an installation gap of 0.02-0.05 mm; ④ Place the lower support block 43 into the lower clamping groove 41, maintaining a movement gap of 0.1-0.3 mm; ⑤ Place the upper support block 44 into the upper clamping groove 42, maintaining a movement gap of 0.1-0.3 mm; ⑥ Pass the adjusting bolt 45 through the center hole of the upper support block 44 → the center hole of the lower support block 43 from top to bottom; ⑦ Install the locking nut 46 at the end of the adjusting bolt 45, with a preload torque of 3 N·m.

[0022] Wide range adjustment verification: Rotate the adjusting bolt 45 degrees 8 turns (lifting amount 4mm), the height change of the right end of support frame 1 is 4mm, and the rotation angle of the support frame is measured. (L=25mm is the distance from the hinge center to the bolt center), achieving an adjustment range of ±10°.

[0023] Horizontal positioning verification: Place a roller with a 25° cone angle in V-groove 11, rotate the bolt counterclockwise 6 turns (raise by 3mm), and the laser level shows that the horizontality error of the roller axis is ±0.3°.

[0024] Example 2: Positioning Component of Positioning and Detection System

[0025] Two end face blocks 6 are installed on the front and rear ends of the V-groove 11, respectively, with an axial positioning accuracy of ±0.1mm.

[0026] Through-beam sensor integration and installation steps: Install support rods on both sides of the worktable 2. Each support rod has a mounting plate on its top, with a Φ6.1mm through hole machined on the mounting plate. Interference-fit sensor transmitter 71 and sensor receiver 72 into the two through holes respectively. Align the beam height with the center line of the V-groove 11 (error ≤ 0.05mm) and machine a Φ6.1mm through hole.

[0027] Detection logic implementation: When the roller is not placed: the beam from the transmitting end reaches the receiving end directly → output high level (24V). When the roller is tilted >1°: the beam is partially blocked → output fluctuating voltage (0-18V). When the roller is horizontal (≤0.5° error): the beam is completely blocked → output low level (0V).

[0028] Example 3: Implementation of Optimized Structure

[0029] Support block shape optimization: A. Spherical support block implementation: The upper support block 44 and lower support block 43 are made of precision bearing steel balls (GB / T308-2002 standard), with a diameter of Ø10mm and a sphericity ≤0.005mm. Gutter design: The bottom radius of the upper clamping groove 42 and the lower clamping groove 41 is R=5.2mm, forming a 0.2mm lubrication gap with the radius of the sphere (R=5mm). Lubrication treatment: Inject molybdenum disulfide high-temperature grease (working temperature -30~150℃). B. Anti-loosening design implementation: The locking operation is divided into three steps: After the angle is adjusted to the correct position, use a torque wrench to pre-tighten the locking nut 46 to 5N·m, rotate the adjusting bolt 45:15° in the opposite direction (to generate axial pre-tension), and finally tighten the locking nut 46 to 8N·m.

[0030] Vibration test: According to GB / T 2423.10 standard, frequency 20Hz, acceleration 10g, continuous for 2 hours without loosening.

[0031] Example 4: Narrow-range high-precision adjustment

[0032] 1. Parameter configuration: Angle adjustment range: ±2.5°; Pivot distance L: 25mm; Bolt lead Δh: 0.5mm; Single-turn angle resolution: θ=arctan(0.5 / 25)≈1.15° / turn.

[0033] 2. Operating Procedures: Place the roller with a cone angle of 15°±2° into the V-groove 11; observe the output signal of the through-beam sensor; if the output is not 0V (indicating it is not level), adjust according to the following procedure: If the sensor output is >0V, rotate the bolt clockwise 1 / 4 turn (lowering it by 0.125mm). If the sensor output is =24V, rotate the bolt counterclockwise 1 / 4 turn (raising it by 0.125mm). Wait 2 seconds after each adjustment and check the sensor output. Repeat steps 3-4 until the sensor output is 0V (the beam is completely blocked). Tighten the nut according to the anti-loosening procedure in Example 3.

[0034] 3. Performance verification accuracy: The horizontality error of the roller axis detected by the coordinate measuring machine is ≤0.05°.

[0035] Efficiency: The average time to adjust from the maximum offset position (+2.5°) to horizontal is 15 seconds. Lifespan: After 5000 continuous adjustments, the wear of the ball is 0.005mm.

[0036] Example 5: Implementation of Width-Narrow Range Comparison

[0037] Test configuration

[0038] Group Adjustment range Roller taper tolerance Bolt lead Pivot distance Group A ±10° ±5° 0.5mm 25mm Group B ±2.5° ±2° 0.5mm 25mm

[0039] Operating Procedure: A. Test 10 types of tapered rollers (from 5° to 25°) for each group. B. Record the total time from placing the rollers to adjusting them to a horizontal position. C. Measure the final levelness error using a laser interferometer. D. Measure the wear of the support block every 100 adjustments.

[0040] Test Results

[0041] index Group A (±10°) Group B (±2.5°) Average settling time 38 seconds 15 seconds Maximum horizontal error 0.25° 0.05° Wear after a thousand adjustments 0.01mm 0.002mm

[0042] Industrial utility model

[0043] Implemented on a bearing manufacturing plant's testing line: Narrow-range sample stage application: for precision tapered rollers (tolerance ±1°), configuration: pivot distance L=25mm; bolt lead Δh=0.5mm; 50 adjustments per day, 18 months maintenance-free. Wide-range sample stage application: for ordinary rollers (tolerance ±5°), configuration: pivot distance L=35mm; bolt lead Δh=1mm; meets ±15° adjustment requirements.

[0044] Finally, several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may change. Second, the accompanying drawings of the embodiments disclosed in this utility model only involve structures relevant to the embodiments disclosed in this utility model. Other structures can refer to common designs. Where there is no conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally, the above descriptions are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjustable angle roller sample stage for keeping the axis of a tapered roller horizontal, characterized in that, Its structure includes: a support frame (1) with a V-groove (11) for placing tapered rollers; a worktable (2) with a support plate (21); a hinge shaft (3) rotatably connecting one end of the support frame (1) to the support plate (21); and an angle fine-tuning mechanism located at the other end of the support frame (1), including: a lower clamping groove (41) fixed to the support plate (21); an upper clamping groove (42) located on the support frame (1); and a lower support block rotatably located in the lower clamping groove (41). 43); an upper support block (44) that can be freely rotatably disposed in the upper clamping groove (42); an adjusting bolt (45) that passes through the upper support block (43) and the lower support block (44); wherein, rotating the adjusting bolt (45) drives the upper support block (44) and the lower support block (43) to generate relative displacement, thereby driving the support frame (1) to rotate around the hinge axis (3), adjusting the inclination angle of the V-groove (11), so that the axis of the tapered roller placed in the V-groove (11) is in a horizontal state.

2. The adjustable angle roller sample stage according to claim 1, characterized in that, It also includes an end face stop (6), which is located at the end of the V-groove (11) to restrict the axial movement of the roller.

3. The adjustable angle roller sample stage according to claim 1, characterized in that, It also includes a through-beam sensor (7), the transmitting end (71) and the receiving end (72) of the through-beam sensor (7) are respectively located on both sides of the V-groove (11), and are used to detect whether the roller is placed in place by the beam blocking state.

4. The adjustable angle roller sample stage according to claim 1, characterized in that, The upper support block (44) and the lower support block (43) are spherical or cylindrical structures, and their radii of curvature are smaller than the groove radii of the upper clamping groove (42) and the lower clamping groove (41).

5. The adjustable angle roller sample stage according to claim 1, characterized in that, The adjusting bolt (45) is equipped with a locking nut (46) for fixing the adjusted position.

6. The adjustable angle roller sample stage according to claim 1, characterized in that, The angle adjustment range of the support frame (1) is ±2.5°, and the lead of the adjusting bolt (45) satisfies: ;in, To adjust the single-turn lifting amount of the adjusting bolt (45), The distance from the center of the hinge shaft (3) to the center of the adjusting bolt (45) is denoted as .

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