A universal caliper calibration device

Abstract

The present invention discloses a universal caliper calibration device, which belongs to the field of geometric calibration technology, and includes a workbench, on which a vernier clamping mechanism is arranged, and the vernier clamping mechanism includes a vertical bracket and a horizontal storage rack that is slidably connected to the vertical bracket and lifted vertically, and at least two clamping parts for fixing the caliper are slidably connected to the horizontal storage rack, and the clamping parts are locked and fixedly connected to the horizontal storage rack through a locking mechanism. In the present invention, the clamping part for fixing the caliper is arranged on a liftable horizontal storage bracket, so that the caliper can be calibrated by controlling the lifting after only the fixing work is performed, which avoids the problem of high labor intensity of manual calibration on the one hand, and avoids the problem of large measurement errors caused by the shaking and other phenomena that are easy to occur during the alignment process of the caliper and the gauge block during manual measurement.

Description

Technical Field

[0001] The invention relates to the technical field of geometric quantity calibration, and in particular to a universal caliper calibration device. Background Art

[0002] Universal caliper (caliper for short) is a measuring tool for measuring length, inner and outer diameter, and depth. Vernier caliper consists of a main scale and a sliding vernier attached to the main scale.

[0003] Universal calipers are one of the most widely used and important measuring tools in the machinery industry. They are widely used in various fields of the national economy, such as manufacturing, installation, and scientific research institutes. They are also essential tools for workers and inspectors in processing workshops. The companies or metrology departments that produce these universal calipers need to perform performance verification of the indication errors of these universal calipers in accordance with the regulations formulated by relevant departments. The traditional verification method is completed manually, which has the disadvantages of large workload, low efficiency, and low precision. It is also affected by human errors, resulting in inaccurate final verification results. Whether it is used correctly will directly affect the qualified rate of the inspected products and even affect the economic benefits of the enterprise.

[0004] There are two pairs of movable jaws on the main scale and vernier of the caliper, namely the inner measuring jaw and the outer measuring jaw. The inner measuring jaw is usually used to measure the inner diameter, and the outer measuring jaw is usually used to measure the length and outer diameter. The depth gauge is connected to the vernier scale and can measure the depth of the groove and the barrel. Commonly used universal calipers can be divided into four types according to their accuracy: 0.10 mm, 0.05 mm, 0.02 mm and 0.01 mm universal calipers.

[0005] At present, the calibration of calipers and gauge blocks carried out by calibration institutions is done entirely manually throughout the entire calibration process, which has the following disadvantages: 1. Using equal-height blocks for support calibration makes the operation difficult; 2. During the calibration process, the calibrator and gauge block are prone to displacement and relative displacement, which affects the measurement results; 3. High personnel capabilities are required, and the calibration process cannot be performed by one person, resulting in a waste of human resources; 4. For large-range calipers, a semicircular block must be placed under the block gauge to adjust the position and direction of the block gauge so that the working surface of the block gauge and the working surface of the caliper are aligned, which is extremely labor-intensive; 5. The calibration efficiency is low and extremely inconvenient. Summary of the invention

[0006] The object of the present invention is to provide a universal caliper calibration device with convenient operation, small error and high calibration efficiency in view of the defects and shortcomings of the prior art.

[0007] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a universal caliper calibration device, including a workbench, on which a vernier clamping mechanism is arranged, the vernier clamping mechanism includes a vertical bracket and a horizontal storage rack slidably connected to the vertical bracket and lifted vertically, at least two clamping parts for fixing the caliper are slidably connected to the horizontal storage rack, and the clamping parts are locked and fixedly connected to the horizontal storage rack through a locking mechanism.

[0008] Preferably, the clamping part includes a fixed clamping part and / or an adjustable clamping part; the fixed clamping part includes a fixed support rod connecting block slidably connected to the transverse storage rack and a fixed caliper support rod arranged on the fixed support rod connecting block; the adjustable clamping part includes an adjustable support rod connecting block slidably connected to the transverse storage rack and a fine-tuning drive part arranged on the adjustable support rod connecting block, and the lower part of the fine-tuning drive part is connected to the adjustable caliper support rod.

[0009] Preferably, when the fixed clamping portion and the adjustable clamping portion are simultaneously provided on the transverse storage rack, the fixed clamping portion is located at an end portion of the transverse storage rack, and the adjustable clamping portion is located in the middle portion of the transverse storage rack.

[0010] Preferably, the fine-tuning drive unit comprises a fine-tuning rod and an adjusting rod sequentially connected from top to bottom, the fine-tuning rod is threadedly connected to the adjustable support rod connecting block, and the lower end of the adjusting rod is connected to the adjustable caliper support rod.

[0011] Preferably, a limiting screw is provided on the adjustable clamping portion, an oblong hole is provided at the lower end of the adjustable support rod connecting block, one end of the limiting screw is provided at the lower end of the fine-tuning driving portion, and the other end of the limiting screw is at least located in the oblong hole.

[0012] Preferably, the horizontal storage rack is connected to the clamping portion via a sliding connection structure, and the sliding connection structure includes a sliding block and a sliding groove used in conjunction with each other, and a locking screw hole for passing a locking bolt for locking the sliding block is provided on the sliding block or the sliding groove.

[0013] Preferably, the horizontal storage rack is connected to the vertical bracket through a vertical lifting mechanism, and the vertical lifting mechanism includes a lifting drive motor, a rotating screw and a screw nut connected in sequence, the screw nut is fixedly connected to the horizontal storage rack, and the rotating screw is rotatably arranged on the vertical bracket.

[0014] Preferably, there are at least two vertical brackets, the horizontal storage rack is connected to each vertical bracket via a corresponding vertical lifting mechanism, and adjacent vertical lifting mechanisms are connected via a synchronous belt.

[0015] Preferably, a proximity switch is provided on the vertical bracket.

[0016] Preferably, a gauge block adjustment assembly is also provided on the workbench, and the gauge block adjustment assembly includes a gauge block table hinged to the workbench at one end and a cam mechanism rotatably arranged on the workbench, and the cam mechanism includes a rotating rod, a threaded block, a rocker arm and a rotating shaft connected in sequence, the rotating rod is rotatably connected to the workbench, the rotating rod is threadedly connected to the threaded block, the threaded block is hinged to the rocker arm, and the rotating shaft is provided with a cam located below the other end of the gauge block table.

[0017] Compared with the prior art, the present invention has achieved the following beneficial effects:

[0018] 1. In the universal caliper calibration device provided by the present invention, the clamping part for fixing the caliper is arranged on a liftable horizontal storage bracket, so that the caliper can be calibrated by controlling the lifting and lowering after only the fixing work is performed. On the one hand, the problem of high labor intensity of manual calibration is avoided, and on the other hand, the problem of large measurement errors caused by shaking during the alignment of the caliper and the gauge block during manual measurement is avoided; further, at least two clamping parts are arranged on the horizontal storage rack, which not only clamps the caliper head, but also supports and positions the caliper tail, avoiding the problem of stress bending of the caliper head due to shaking of the tail, thereby ensuring measurement accuracy.

[0019] 2. In the universal caliper calibration device provided by the present invention, an adjustable clamping part is provided so that the head position or the tail position of the caliper can be fine-tuned, thereby avoiding the problem that the caliper cannot be effectively fixed due to the manufacturing error of the clamping part itself;

[0020] 3. In the universal caliper calibration device provided by the present invention, a proximity switch is provided on the vertical bracket, so that the downward movement of the horizontal storage rack can be effectively controlled to avoid the problem of the caliper being damaged due to excessive downward movement.

[0021] 4. In the universal caliper calibration device provided by the present invention, a gauge block adjustment assembly is provided on the workbench, which facilitates the installation and fine adjustment of the gauge block and improves the calibration efficiency.

[0022] 5. In the universal caliper calibration device provided by the present invention, the entire calibration process can be operated by one person, which saves manpower and improves calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a schematic diagram of the overall structure of the universal caliper calibration device of the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of the middle bracket and the vertical lifting mechanism;

[0026] Figure 3 for Figure 1 A schematic diagram of the structure of the horizontal storage bracket;

[0027] Figure 4 for Figure 1 Schematic diagram of the structure of the middle block adjustment component;

[0028] Figure 5 for Figure 1 A schematic diagram of the structure of the fixed clamping part;

[0029] Figure 6 for Figure 1 A schematic diagram of the structure of the adjustable clamping part;

[0030] Figure 7 for Figure 4 Structural diagram of the cam mechanism;

[0031] Among them, 1 workbench, 2 vertical bracket, 3 horizontal storage rack, 4 fixed clamping part, 5 adjustable clamping part, 6 fixed support rod connecting block, 7 fixed caliper support rod, 8 adjustable support rod connecting block, 9 adjustable caliper support rod, 10 fine-tuning rod, 11 adjusting rod, 12 limit screw, 13 slider, 14 slide slot, 15 vertical lifting mechanism, 16 lifting drive motor, 17 rotating screw, 18 screw nut, 19 proximity switch, 20 gauge block adjustment assembly, 21 gauge block table, 22 rotating rod, 23 threaded block, 24 rocker arm, 25 rotating shaft, 26 cam. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The object of the present invention is to provide a universal caliper calibration device with convenient operation, small error and high calibration efficiency in view of the defects and shortcomings of the prior art.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-7 As shown, the present invention provides a universal caliper calibration device, including a workbench 1, on which a vernier clamping mechanism is arranged, the vernier clamping mechanism includes a vertical bracket 2 and a horizontal storage rack 3 slidably connected to the vertical bracket 2 and lifted vertically, at least two clamping parts for fixing the caliper are slidably connected to the horizontal storage rack 3, and the clamping parts are locked and fixedly connected to the horizontal storage rack 3 through a locking mechanism. Among them, the workbench 1 can be a flat plate structure or a structure with a bracket, preferably a hollow structure; the number of vertical brackets 2 and the spacing when there are multiple brackets 2 are determined according to the length of the horizontal storage rack 3, and only the horizontal storage rack 3 can be stably supported; the lifting method of the horizontal storage rack 3 can be various, and it can be a retractable oil cylinder, cylinder and other structures, it can be a rack, gear and other structures, or it can be a screw structure with better stability and higher adjustment accuracy. Of course, its lifting process can be manually controlled or electrically controlled. When it is electrically automatically controlled, it is necessary to set an electric control box as shown in the figure; the working process is: place the gauge block on the workbench 1, then fix the caliper on the clamping part, and then control the up and down movement of the horizontal storage rack 3 The caliper moves toward the gauge block, and then the calibration is completed according to the calibrator calibration specification. In the above technical solution, the clamping part for fixing the caliper is arranged on a liftable horizontal storage bracket, so that the caliper only needs to be fixed before it can be calibrated by controlling the lifting. On the one hand, the labor intensity of manual calibration is avoided, and on the other hand, the problem of large measurement errors caused by shaking during the alignment of the caliper and the gauge block during manual measurement is avoided. Furthermore, at least two clamping parts are arranged on the horizontal storage rack 3, which not only clamps the caliper head, but also supports and positions the caliper tail, avoiding the problem of stress bending of the caliper head due to shaking of the tail, thereby ensuring the measurement accuracy.

[0036] The clamping part in the present invention includes a fixed clamping part 4 and / or an adjustable clamping part 5; the fixed clamping part 4 includes a fixed support rod connecting block 6 slidably connected to the horizontal storage rack 3 and a fixed caliper support rod 7 arranged on the fixed support rod connecting block 6; the adjustable clamping part 5 includes an adjustable support rod connecting block 8 slidably connected to the horizontal storage rack 3 and a fine-tuning drive part arranged on the adjustable support rod connecting block 8, and the lower part of the fine-tuning drive part is connected to the adjustable caliper support rod 9. Among them, only one of the fixed clamping part 4 and the adjustable clamping part 5 can be set, and of course, both can be set at the same time. Further, when the fixed clamping part 4 and the adjustable clamping part 5 are set on the horizontal storage rack 3 at the same time, the fixed clamping part 4 is located at the end of the horizontal storage rack 3, and the adjustable clamping part 5 is located in the middle of the horizontal storage rack 3; both the fixed caliper support rod 7 and the adjustable caliper support rod 9 are provided with clamping areas of several diameters to facilitate effective clamping of the caliper head; the structure of the fine-tuning drive part is also diverse, which can be a telescopic cylinder or a manual threaded rod. For example, the fine-tuning drive part in the present invention is set to It includes a fine-tuning rod 10 and an adjusting rod 11 connected in sequence from top to bottom, the fine-tuning rod 10 is threadedly connected to the adjustable support rod connecting block 8, and the lower end of the adjusting rod 11 is connected to the adjustable caliper support rod 9. When adjusting, after rotating the fine-tuning rod 10, the adjusting rod 11 and the adjustable caliper rod vertically connected to the adjusting rod 11 are driven to move up and down for fine-tuning; and the method of setting an adjustable clamping part 5 is adopted here, so that the head position or the tail position of the caliper can be fine-tuned, avoiding the problem that the caliper cannot be effectively fixed due to the manufacturing error of the clamping part itself; so it is preferred to set the fixed clamping part 4 and the adjustable clamping part 5 at the same time.

[0037] In order to limit the fine-tuning displacement and avoid the problem of too large an adjustment range, a limit screw 12 is provided on the adjustable clamping portion 5 in the present invention, and an oblong hole is provided at the lower end of the adjustable support rod connecting block 8. One end of the limit screw 12 is provided at the lower end of the fine-tuning drive portion, and the other end of the limit screw 12 is at least located in the oblong hole; that is, due to the limit screw 12, the adjustment range can only be the length of the oblong hole; there are various ways to install the limit screw 12, and one end of the limit screw 12 can be directly connected to the adjusting rod 11 by detachable threading. For the convenience of operation, threaded holes can also be provided on the adjusting rod 11 and the adjustable caliper support rod 9, so that after the other end of the limit screw 12 directly passes through the adjusting rod 11 and the adjustable caliper support rod 9, the technical effect of the other end of the limit screw 12 being at least located in the oblong hole is achieved.

[0038] In order to realize the locking and fixed connection between the clamping part and the horizontal storage rack 3 through the locking mechanism, the horizontal storage rack 3 and the clamping part are connected through a sliding connection structure in the present invention. The sliding connection structure includes a slider 13 and a slide groove 14 used in conjunction with each other. A locking screw hole for a locking bolt to lock the slider 13 is provided on the slider 13 or the slide groove 14; that is, when the position of the clamping part is adjusted, the locking work is performed by the locking bolt or other similar structures.

[0039] In order to realize the lifting and lowering of the horizontal storage rack 3, the horizontal storage rack 3 in the present invention is connected to the vertical bracket 2 through a vertical lifting mechanism 15. The vertical lifting mechanism 15 includes a lifting drive motor 16, a rotating screw 17 and a screw nut 18 connected in sequence. The screw nut 18 is fixedly connected to the horizontal storage rack 3, and the rotating screw is rotatably set on the vertical bracket 2.

[0040] In order to ensure the movement stability of the horizontal storage rack 3, the vertical brackets 2 in the present invention are at least two, and the horizontal storage rack 3 is connected to each vertical bracket 2 through a corresponding vertical lifting mechanism 15, and adjacent vertical lifting mechanisms 15 are connected through a synchronous belt; at the same time, in order to ensure synchronization, adjacent vertical lifting mechanisms 15 are connected through a synchronous belt. The specific structure is as follows: Figure 2 shown.

[0041] In the present invention, a proximity switch 19 is provided on the vertical bracket 2. The proximity switch 19 is an existing component and can be electrically connected to the electric control box; thus, the downward movement of the horizontal storage rack 3 can be effectively controlled to avoid the problem of caliper being damaged due to excessive downward movement.

[0042] In the present invention, a gauge block adjustment assembly 20 is also provided on the workbench 1, that is, the gauge block adjustment assembly 20 is provided on the workbench 1, which is convenient for the installation and fine adjustment of the gauge block and improves the calibration efficiency; wherein the gauge block adjustment assembly 20 comprises a gauge block table 21 hinged to the workbench 1 at one end and a cam mechanism rotatably provided on the workbench 1, the cam mechanism comprises a rotating rod 22, a threaded block 23, a rocker arm 24 and a rotating shaft 25 connected in sequence, the rotating rod 22 is rotatably connected to the workbench 1, the rotating rod 22 is threadedly connected to the threaded block 23, and the threaded block 24 is connected to the workbench 1. 3 is hinged with the rocker arm 24, and a cam 26 is arranged on the rotating shaft 25 and is located below the other end of the gauge block table 21; the working process is to rotate the rotating rod 22, and the rotating rod 22 is idle relative to the workbench 1 (the principle of idle rotation is the existing technology, such as setting an annular cavity to limit the axial movement of the rotating rod 22 or installing an axial limit key), that is, no upward displacement is generated, and in this process, the threaded block 23 is driven to move up and down, and then the rocker arm 24 is driven to swing up and down, and finally the cam 26 on the rotating shaft 25 is driven to rotate, so as to realize the movement of the gauge block table 21.

[0043] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A universal caliper calibration device, characterized in that: The workbench is provided with a vernier clamping mechanism, the vernier clamping mechanism comprises a vertical bracket and a horizontal storage rack slidably connected to the vertical bracket and lifted vertically, at least two clamping parts for fixing the caliper are slidably connected to the horizontal storage rack, and the clamping parts are locked and fixedly connected to the horizontal storage rack through a locking mechanism; The clamping part includes a fixed clamping part and / or an adjustable clamping part; the fixed clamping part includes a fixed support rod connecting block slidably connected to the horizontal storage rack and a fixed caliper support rod arranged on the fixed support rod connecting block; the adjustable clamping part includes an adjustable support rod connecting block slidably connected to the horizontal storage rack and a fine-tuning driving part arranged on the adjustable support rod connecting block, and the lower part of the fine-tuning driving part is connected to the adjustable caliper support rod; The vertical bracket is provided with a proximity switch.

2. The universal caliper calibration device according to claim 1, characterized in that: When the fixed clamping portion and the adjustable clamping portion are simultaneously arranged on the transverse storage rack, the fixed clamping portion is located at the end of the transverse storage rack, and the adjustable clamping portion is located in the middle of the transverse storage rack.

3. The universal caliper calibration device according to claim 1, characterized in that: The fine-tuning driving part comprises a fine-tuning rod and an adjusting rod which are sequentially connected from top to bottom. The fine-tuning rod is threadedly connected to the adjustable support rod connecting block, and the lower end of the adjusting rod is connected to the adjustable caliper support rod.

4. The universal caliper calibration device according to claim 1, characterized in that: The adjustable clamping part is provided with a limiting screw, the lower end of the adjustable support rod connecting block is provided with an oblong hole, one end of the limiting screw is provided at the lower end of the fine-tuning driving part, and the other end of the limiting screw is at least located in the oblong hole.

5. The universal caliper calibration device according to claim 1, characterized in that: The horizontal storage rack is connected to the clamping part via a sliding connection structure, and the sliding connection structure includes a sliding block and a sliding groove used in conjunction with each other. The sliding block or the sliding groove is provided with a locking screw hole through which a locking bolt for locking the sliding block passes.

6. The universal caliper calibration device according to claim 1, characterized in that: The horizontal storage rack is connected to the vertical bracket via a vertical lifting mechanism, and the vertical lifting mechanism includes a lifting drive motor, a rotating screw and a screw nut connected in sequence, the screw nut is fixedly connected to the horizontal storage rack, and the rotating screw is rotatably arranged on the vertical bracket.

7. The universal caliper calibration device according to claim 6, characterized in that: There are at least two vertical brackets, and the horizontal storage rack is connected to each vertical bracket through the corresponding vertical lifting mechanism, and adjacent vertical lifting mechanisms are connected through a synchronous belt.

8. The universal caliper calibration device according to any one of claims 1 to 7, characterized in that: A gauge block adjustment assembly is also provided on the workbench, and the gauge block adjustment assembly includes a gauge block table hinged to the workbench at one end and a cam mechanism rotatably arranged on the workbench, the cam mechanism includes a rotating rod, a threaded block, a rocker arm and a rotating shaft connected in sequence, the rotating rod is rotatably connected to the workbench, the rotating rod is threadedly connected to the threaded block, the threaded block is hinged to the rocker arm, and the rotating shaft is provided with a cam located below the other end of the gauge block table.

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