Multidirectional adjustment infrared positioning clamp for roughness measurement

Abstract

The utility model relates to a multidirectional adjustment infrared positioning clamp for roughness measurement. The multidirectional adjustment infrared positioning clamp comprises a base, a cross-shaped laser emitting device, a sliding table, a lifting mechanism, a transverse moving mechanism and a three-jaw chuck assembly. The cross-shaped laser emitting device is arranged in the middle of the front side of the upper end face of the base. The transverse moving mechanism is horizontally arranged on the upper end face of the base. The lifting mechanism is vertically arranged above the base and is connected with the transverse moving mechanism; the sliding table is longitudinally connected to the lifting mechanism in a sliding mode. The three-jaw chuck assembly is correspondingly arranged on the front side of the sliding table. By means of the multidirectional adjusting mechanism, infrared positioning, stable clamping of the three-jaw chuck and the like, the utility model aims to solve the problems of low measurement efficiency, poor data repeatability and the like caused by fuzzy positioning reference and insufficient adjusting dimension of the traditional clamp, and can be widely applied to surface roughness detection scenes in the fields of machining, material science and the like.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a multi-directional adjustable infrared positioning fixture for roughness measurement. Background Technology

[0002] Conventional clamps use V-blocks to hold cylindrical workpieces, and two-dimensional adjustments to their vertical and horizontal positions are achieved by manually adjusting a screw or slider. For example, Chinese patent CN202222138521.6 discloses a clamping structure based on a V-groove, which uses a screw to drive a pressure block to move and adapt to workpieces of different diameters, and uses a mechanical limiting device to fix its position. The main process is to place the cylindrical workpiece in the V-groove, manually tighten the screw to push the pressure block to clamp the workpiece; by opening V-grooves of different sizes around the limiting block, and cooperating with the second slider and the second sliding groove in the base, different sizes of V-grooves can be quickly adjusted for workpieces of different sizes; the operator relies on visual judgment of the parallelism between the workpiece axis and the measuring plane to manually fine-tune the horizontal and vertical positions.

[0003] However, the aforementioned existing technology relies on the line contact clamping between the V-groove and the workpiece, and achieves two-dimensional position adjustment by manually adjusting the screw. Specific defects and causes include: unclear positioning reference: because the V-groove only clamps the cylindrical workpiece through line contact, it cannot identify the highest point of the cylinder (i.e., the theoretical reference point for roughness measurement), leading to the measurement starting point needing to rely on manual visual judgment or repeated probe contact for positioning, which is inefficient and prone to human error; lack of calibration function: the V-block has no calibration method, and the parallelism between the workpiece axis and the measurement plane needs to be manually adjusted by the operator, making it difficult to guarantee calibration accuracy; limited adaptability: the V-groove is only suitable for standard cylindrical workpieces, and has poor clamping stability for irregularly shaped parts (such as eccentric shafts and polygonal cross-section parts), easily causing workpiece displacement or tilting due to uneven contact surfaces. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a multi-directional adjustable infrared positioning fixture for roughness measurement. Through the design of a multi-directional adjustment mechanism, an infrared positioning device, and a three-jaw stable clamping system, it aims to fundamentally solve the problems of positioning ambiguity, inefficient adjustment, difficult calibration, and insufficient stability of existing fixtures in the roughness measurement of cylindrical samples and irregularly shaped workpieces.

[0005] The technical solution adopted in this utility model is as follows:

[0006] The present invention discloses a multi-directional adjustable infrared positioning fixture for roughness measurement, comprising a base, a cross laser emitting device, a slide, a lifting mechanism, a transverse movement mechanism, and a three-jaw chuck assembly; the cross laser emitting device is disposed in the middle of the front side of the upper end face of the base; the transverse movement mechanism is horizontally disposed on the upper end face of the base; the lifting mechanism is vertically disposed above the base and connected to the transverse movement mechanism; the slide is longitudinally slidably connected to the lifting mechanism; and the three-jaw chuck assembly is correspondingly disposed on the front side of the slide.

[0007] Furthermore, the lateral movement mechanism includes a fixed base, a lateral handle screw, and lateral guide rods; the fixed base is fixedly connected to the rear side of the upper end face of the base; the lateral handle screw is disposed on the upper end face of the base in the front-back direction and is rotatably connected to the fixed base; the lateral guide rods are respectively disposed parallel to both sides of the lateral handle screw and are fixedly connected to the fixed base; the lower center of the lifting mechanism is slidably engaged with the lateral handle screw through a lead screw nut; the lower two sides of the lifting mechanism are respectively slidably connected to the two lateral guide rods.

[0008] Furthermore, the lifting mechanism includes an upright plate, supports, a longitudinal handle screw, and a longitudinal guide rod; the upright plate is vertically disposed above the upper surface of the base, and its bottom is slidably engaged with the transverse handle screw and the transverse guide rod respectively; the supports are vertically disposed on the upper and lower sides of the front end face of the upright plate respectively; the longitudinal handle screw is rotatably connected between the upper and lower supports; the longitudinal guide rods are parallel to both sides of the longitudinal handle screw, and both ends are fixedly connected to the supports respectively; the middle part of the slide is slidably engaged with the longitudinal handle screw through a screw nut; the two sides of the slide are slidably connected to the two longitudinal guide rods respectively.

[0009] Furthermore, the three-jaw chuck assembly includes a chuck body, a locking handle screw, and a circular ball bearing; the rear end of the chuck body is coaxially fixed to the front side of the outer ring of the circular ball bearing; the inner ring of the circular ball bearing is fixed to the middle of the front side of the slide; the chuck body adopts a three-jaw self-centering synchronous connection structure, and the chuck and the collet are connected internally by a bevel gear, and are locked by rotation through a radial locking handle screw.

[0010] Furthermore, a graduated ring is provided on the outer circumference of the outer ring of the circular ball bearing; the graduated ring is fixedly connected to the slide.

[0011] Furthermore, a radial positioning handle screw is provided through one side of the graduated ring; the inner end of the positioning handle screw abuts against the outer ring of the circular ball bearing to lock the bearing.

[0012] Furthermore, the base is a cuboid structure made of high-strength aluminum alloy.

[0013] Furthermore, the base is filled with strong magnets, and a magnetic switch is provided on one side of the base.

[0014] Furthermore, a limiting groove is opened in the middle of the front side of the upper end face of the base, and the cross laser emitting device is embedded in the limiting groove, with its emitting end at the same horizontal height as the upper end face of the base.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This utility model achieves a breakthrough improvement in measurement efficiency, accuracy, and applicability through multi-dimensional innovative design. The specific technical effects and advantages are as follows:

[0017] 1. Improved measurement efficiency (increased efficiency + reduced procedures)

[0018] The four-way adjustment function shortens the clamp posture adjustment time: traditional clamps require repeated disassembly-positioning-calibration (about 5 minutes / time), while this clamp achieves rapid positioning within 1 minute through the upper and lower / front and back two-dimensional slide rails.

[0019] The infrared positioning system reduces the centering time of cylindrical samples: the cross infrared beam can capture the center coordinates of the top of the cylinder in real time, which is about 40 times more efficient than traditional visual positioning.

[0020] Three-jaw chuck rotation calibration reduces auxiliary time by about 60%: the integrated level enables one-click calibration of workpiece surface parallelism, while traditional manual shim adjustment requires repeated trials.

[0021] 2. Breakthrough in measurement accuracy (improved accuracy + quality assurance)

[0022] High positioning accuracy on curved surfaces: The infrared positioning device significantly improves the positioning accuracy compared to the contact positioning of traditional fixtures.

[0023] Reduced parallelism deviation of the reference plane: The three-jaw chuck provides stable clamping, ensuring that the angle error between the roughness tester's measuring surface and the workpiece's reference surface is controlled within a small range, which is an improvement over conventional fixtures.

[0024] 3. Comprehensive performance optimization (applicability scope + cost control)

[0025] Expanded compatibility: The three-jaw chuck can hold cylindrical and irregularly shaped parts, covering a wide range of roughness inspection workpiece types, saving on fixture procurement costs compared to traditional dedicated fixtures (which are only compatible with fixed specifications).

[0026] Labor cost savings: Reduces the time spent on measurement. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 for Figure 1A schematic diagram of the explosion structure.

[0029] The attached figures are labeled as follows: 1-locking handle screw; 2-slide table; 3-scale ring; 4-chuck body; 5-cross laser emitter; 6-base; 7-vertical handle screw; 8-upper plate; 9-vertical guide rod; 10-horizontal handle screw; 11-horizontal guide rod; 12-fixed seat; 13-magnetic switch; 14-positioning handle screw; 15-support. Detailed Implementation

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] It should be noted that in the description of this utility model, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0032] This utility model addresses the core problems of low positioning accuracy, poor adjustment efficiency, and weak environmental adaptability in the roughness measurement of cylindrical and irregularly shaped workpieces. Combining the characteristics of mechanical fixtures and the requirements of measurement scenarios, the following innovative design is proposed.

[0033] See appendix Figure 1 The present invention proposes a multi-directional adjustable infrared positioning fixture for roughness measurement, comprising a base 6, a cross laser emitting device 5, a slide 2, a lifting mechanism, a transverse movement mechanism, and a three-jaw chuck assembly.

[0034] In this embodiment, the base 6 is a cuboid structure made of high-strength aluminum alloy. The interior of the base 6 is filled with strong magnets, i.e., a magnetic base, consisting of a permanent magnet, a magnetically conductive block, and an external rotary magnetic switch 13. When in the ON state (attracted), rotating the magnetic switch aligns the magnetic poles of the permanent magnet with the magnetically conductive block, and the magnetic lines of force pass through the working surface of the base 6, forming a closed loop. At this time, the base 6 is tightly attracted to the working surface of the magnetically conductive block. Similarly, when in the OFF state (released), rotating the magnetic switch 13 adjusts the direction of the permanent magnet, and the magnetic lines of force are short-circuited internally (forming a loop through the magnetically conductive block), significantly weakening the magnetic field on the working surface, allowing the base 6 to move easily. Based on this principle, the base 6 can be used to stabilize the measurement environment.

[0035] A limiting groove is opened in the middle of the front side of the upper end face of the base 6. The cross laser emitting device 5 is embedded in the limiting groove, and its emitting end is at the same horizontal height as the upper end face of the base 6. It is used to vertically project laser onto the surface of the workpiece to achieve the positioning and alignment of the workpiece.

[0036] The horizontal moving mechanism is horizontally arranged on the upper surface of the base 6; the lifting mechanism is vertically arranged above the base 6 and connected to the horizontal moving mechanism; the slide table 2 is longitudinally slidably connected to the lifting mechanism; the three-jaw chuck assembly is correspondingly arranged on the front side of the slide table 2.

[0037] The lateral movement mechanism includes a fixed base 12, a horizontal handle screw 10, and a horizontal guide rod 11. The fixed base 12 is fixedly connected to the rear side of the upper end face of the base 6. The horizontal handle screw 10 is arranged along the front-back direction on the upper end face of the base 6 and is rotatably connected to the fixed base 12. The horizontal guide rods 11 are respectively arranged parallel to the left and right sides of the horizontal handle screw 10 and are fixedly connected to the fixed base 12. The lower center of the lifting mechanism is slidably engaged with the horizontal handle screw 10 through a lead screw nut. The lower two sides of the lifting mechanism are respectively slidably connected to the two horizontal guide rods 11.

[0038] The lifting mechanism includes a vertical plate 8, a support 15, a longitudinal handle screw 7, and a longitudinal guide rod 9. The vertical plate 8 is vertically disposed above the upper surface of the base 6, and its bottom corresponding position is laterally slidably engaged with the transverse handle screw 10 and the two transverse guide rods 11 on both sides. The support 15 is vertically disposed on the upper and lower sides of the front end face of the vertical plate 8. The longitudinal handle screw 7 is rotatably connected between the upper and lower support 15. The longitudinal guide rods 9 are disposed parallel to the left and right sides of the longitudinal handle screw 7, and their two ends are fixedly connected to the support 15. The middle part of the slide table 2 is slidably engaged with the longitudinal handle screw 7 through a screw nut. The two sides of the slide table 2 are slidably connected to the two longitudinal guide rods 9 on both sides.

[0039] Manually driving the horizontal handle screw 10 moves the vertical plate 8 back and forth, thereby causing the three-jaw chuck assembly to move the workpiece back and forth. Manually driving the vertical handle screw 7 moves the slide table 2 up and down, thereby causing the three-jaw chuck assembly to move the workpiece up and down.

[0040] The three-jaw chuck assembly includes a chuck body 4, a locking handle screw 1, and a circular ball bearing. The rear end of the chuck body 4 is coaxially fixed to the front side of the outer ring of the circular ball bearing. The inner ring of the circular ball bearing is fixed to the center of the front side of the slide 2. The chuck body 4 adopts a three-jaw self-centering synchronous connection structure, with a bevel gear connecting the chuck and the collet internally. The radial locking handle screw 1 drives the bevel gear to lock the collet. The chuck body 4 can rotate 360°.

[0041] In this embodiment, a graduated ring 3 is also provided on the outer circumference of the outer ring of the circular ball bearing; the graduated ring 3 is fixedly connected to the slide table 2. The graduated ring 3 can accurately reflect the rotation angle of the chuck body 4. A radial positioning handle screw 14 is provided through one side of the graduated ring 3; the inner end of the positioning handle screw 14 abuts against the outer ring of the circular ball bearing, and is used to lock the bearing after the chuck body 4 is rotated into position.

[0042] When measuring the surface roughness of cylindrical or irregularly shaped (eccentric shaft, etc.) workpieces, the workpiece is placed in the chuck body 4 of the three-jaw chuck and locked by rotating the locking handle screw 1. Rotation can be stopped after ensuring workpiece stability. Because the three-jaw chuck employs a three-jaw self-centering synchronous connection structure, the workpiece is fixed in the center position. The desired measurement position is then selected by rotating the circular ball bearing and using the graduated ring 3. Following this, based on the position of the roughness measuring instrument, the horizontal handle screw 10 and the vertical handle screw 7 can be rotated to move the vertical plate 8 and the slide table 2 forward and backward and up and down, respectively, thereby moving the workpiece forward and backward and up and down for the roughness measuring instrument to perform the measurement. For the measurement point, the cross laser emitter 5 can be activated for positioning. Since the workpiece and the cross laser emitter 5 are both in the middle position relative to the base 6, i.e., the laser emission position intersects the workpiece axis, the theoretical reference point for roughness measurement is determined based on the laser position, thus assisting in the positioning of the roughness measuring instrument.

[0043] All matters not detailed in this utility model are common knowledge.

[0044] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A multi-directional adjustable infrared positioning fixture for roughness measurement, characterized in that; The fixture includes a base, a cross-shaped laser emitting device, a slide, a lifting mechanism, a lateral movement mechanism, and a three-jaw chuck assembly; the cross-shaped laser emitting device is located at the center of the front side of the upper end face of the base; the lateral movement mechanism is horizontally located on the upper end face of the base; the lifting mechanism is vertically located above the base and connected to the lateral movement mechanism; the slide is longitudinally slidably connected to the lifting mechanism; and the three-jaw chuck assembly is correspondingly located on the front side of the slide.

2. The multi-directional adjustable infrared positioning fixture for roughness measurement according to claim 1, characterized in that: The lateral movement mechanism includes a fixed base, a horizontal handle screw, and a horizontal guide rod; the fixed base is fixedly connected to the rear side of the upper end face of the base; the horizontal handle screw is arranged along the front-to-back direction on the upper end face of the base and is rotatably connected to the fixed base; the horizontal guide rods are respectively arranged parallel to both sides of the horizontal handle screw and are fixedly connected to the fixed base; the lower center of the lifting mechanism is slidably engaged with the horizontal handle screw through a lead screw nut; the lower two sides of the lifting mechanism are respectively slidably connected to the two horizontal guide rods.

3. The multi-directional adjustable infrared positioning fixture for roughness measurement according to claim 2, characterized in that: The lifting mechanism includes a vertical plate, supports, a longitudinal handle screw, and a longitudinal guide rod. The vertical plate is vertically positioned above the upper surface of the base, with its bottom corresponding to the lateral handle screw and the lateral guide rod in sliding engagement. The supports are vertically positioned on the upper and lower sides of the front end face of the vertical plate. The longitudinal handle screw is rotatably connected between the upper and lower supports. The longitudinal guide rods are parallel to both sides of the longitudinal handle screw, with both ends fixed to the supports. The middle of the slide is slidably engaged with the longitudinal handle screw via a lead screw nut. The two sides of the slide are slidably connected to the two longitudinal guide rods.

4. The multi-directional adjustable infrared positioning fixture for roughness measurement according to claim 1, characterized in that: The three-jaw chuck assembly includes a chuck body, a locking handle screw, and a circular ball bearing; the rear end of the chuck body is coaxially fixed to the front side of the outer ring of the circular ball bearing; the inner ring of the circular ball bearing is fixed to the middle of the front side of the slide; the chuck body adopts a three-jaw self-centering synchronous connection structure, and the chuck and the collet are connected internally by a bevel gear, and are locked by rotation through a radial locking handle screw.

5. A multi-directional adjustable infrared positioning fixture for roughness measurement according to claim 4, characterized in that: A graduated ring is provided on the outer circumference of the outer ring of the circular ball bearing; the graduated ring is fixedly connected to the slide.

6. A multi-directional adjustable infrared positioning fixture for roughness measurement according to claim 5, characterized in that: A radial positioning handle screw is provided through one side of the graduated ring; the inner end of the positioning handle screw abuts against the outer ring of the circular ball bearing to lock the bearing.

7. A multi-directional adjustable infrared positioning fixture for roughness measurement according to claim 1, characterized in that: The base is a cuboid structure made of high-strength aluminum alloy.

8. A multi-directional adjustable infrared positioning fixture for roughness measurement according to claim 1, characterized in that: The base is filled with strong magnets, and a magnetic switch is installed on one side of the base.

9. A multi-directional adjustable infrared positioning fixture for roughness measurement according to claim 1, characterized in that: A limiting groove is opened in the middle of the front side of the upper end of the base. The cross laser emitting device is embedded in the limiting groove, and its emitting end is at the same horizontal height as the upper end of the base.

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