Cone palm positioning and measuring device

Abstract

The utility model provides a cone palm positioning and measuring device. The cone palm positioning and measuring device comprises a reference platform, a locking structure and a measuring assembly, wherein the locking structure is arranged on the reference platform and used for clamping a drill bit; and the measuring assembly is arranged on the reference platform and used for measuring the height of the drill bit installed on the locking structure. Different from a traditional measurement mode, the device adopts a locking structure with a multidirectional constraint function and a measurement assembly, so that the stability of a space reference of a drill bit-height gauge system in the measurement process is ensured, manual intervention is reduced, and the measurement precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of mine machinery engineering, especially a roller cone bit leg positioning and measuring device. BACKGROUND

[0002] In the manufacturing process of PDC-roller cone combined drill bit, the height difference between the roller cone and PDC (polycrystalline diamond compact) tooth is a key parameter determining the cutting performance of the drill bit. The existing detection means is to place the drill bit and height gauge on the ground, lock the bit leg with a clamp and bolt, and manually rotate the drill bit to measure the roller cone tooth and PDC tooth. However, the following problems exist:

[0003] (1) Defects in measurement reference stability

[0004] The existing detection adopts a single clamp and bolt to lock the bit leg, the drill bit and height gauge are placed vertically, and the total height of the roller cone tooth and PDC tooth on the blade is measured by manually rotating the drill bit. However, there is a lack of rigid fixing mechanism, and the drill bit and height gauge cannot be fixed in position during the measurement process. For example, due to the restriction of the complex geometric structure of the drill bit and the length of the height gauge probe (effective stroke < 50 mm), the points that cannot be measured by the probe need to move the position of the height gauge or the drill bit. At this time, the measurement reference has changed (offset > 0.2 mm ~ 0.3 / time) for the previous detection data. Such inconsistency in the reference directly leads to insufficient confidence in the measurement data. For another example, due to the thermal deformation caused by the welding of the bit leg, the axial height of the roller cone bit leg after welding changes, making it difficult to re-measure the data and unable to control the quality of the final product.

[0005] (2) Restrictions on the operation of heavy workpieces

[0006] The drill bit weighs 80-150 kg. In order to measure the total height of the highest tooth on each blade and roller cone, the drill bit needs to be rotated 360° in the circumferential direction to realize full-tooth detection.

[0007] Manual rotation by human beings has significant engineering risks: 1) safety hazards; 2) reference surface fluctuations caused by physical load of personnel; 3) inertial deviation in the process of dynamic rotation. The three factors superimposed cause systematic measurement deviation, visual error ± 0.15 mm, and position change of the contact point caused by manual rotation, resulting in data dispersion exceeding the process allowable value (± 0.1 mm).

[0008] (3) Insufficient positioning accuracy of the bit leg

[0009] The single clamp cannot guarantee that all bit legs are in the same horizontal plane, and frequent manual adjustment is required, which is low in efficiency and difficult to control the accuracy.

[0010] Therefore, it is crucial to provide a roller cone bit leg positioning and measuring device that improves the stability of the reference and realizes full-tooth measurement. UTILITY MODEL CONTENT

[0011] The toothed wheel toothed wheel positioning and measuring device can realize the positioning and measuring of the toothed wheel toothed wheel, and the toothed wheel toothed wheel can be positioned and measured in a simple and convenient manner.

[0012] The toothed wheel toothed wheel positioning and measuring device comprises a reference platform, a locking structure for clamping a drill bit arranged on the reference platform and a measuring assembly for measuring the height of the drill bit installed on the locking structure arranged on the reference platform.

[0013] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0014] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0015] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0016] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0017] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0018] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0019] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0020] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0021] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0022] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0023] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0024] The locking structure comprises a base ring arranged on the reference platform, a vertical plate for realizing axial limiting of the drill bit arranged on the base ring and a clamp assembly for realizing radial limiting of the drill bit arranged on the top of the vertical plate.

[0025] Compared with the prior art, the utility model discloses a locking structure, measurement subassembly and rotation structure for PDC - toothed wheel composite drill head carry out precision measurement, wherein, locking structure has multidirectional restraint function, ensure the stability of drill head - height gauge system space reference in the measurement process, realize the axial and radial rigidity of drill head fixed, inhibit reference surface drift, can also guarantee that three toothed wheel toothed wheel combination components that assemble go to be at the same height, measurement subassembly realizes horizontal reference surface fixed, can slide height gauge according to detection position, play the role of self -adaptation adjustment, can cover all tooth position detection completely, rotation structure, because drill head dead weight, when manual rotation drill head can rely on the thrust ball bearing and drive drill head rotation, play the role of saving manpower. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is structure schematic diagram of toothed wheel toothed wheel positioning measurement device of the utility model;

[0027] Figure 2 It is structure schematic diagram of toothed wheel toothed wheel positioning measurement device of the utility model (show the plan view);

[0028] Figure 3 It is structure schematic diagram of locking structure of the utility model;

[0029] Figure 4 It is structure schematic diagram of reference platform of the utility model;

[0030] Figure 5 It is structure schematic diagram of thrust ball bearing of the utility model;

[0031] Figure 6 It is structure schematic diagram of measurement subassembly of the utility model;

[0032] Figure 7 It is structure schematic diagram of toothed wheel toothed wheel positioning measurement device of the utility model (show the action position of lengthening measuring head). DETAILED DESCRIPTION

[0033] The utility model will be described further in detail below in connection with the drawings and examples, and it needs to point out that the following described examples are aimed at facilitating the understanding of the utility model, and do not have any limiting effect on it.

[0034] As Figure 1 Indicated, the utility model provides a toothed wheel toothed wheel positioning measurement device includes: reference platform 1, be used for clamping drill head in the reference platform 1 set up locking structure 2 and be used for measuring the measurement subassembly 3 of drill head height in locking structure 2 installation on the reference platform 1.

[0035] The traditional clamp locking device cannot realize the positioning of the drill bit in the axial direction, and the relative displacement between the reference surface and the height gauge (the actual measured offset is > (0.2-0.3) mm / time) occurs during the manual rotation of the drill bit. In order to solve this technical problem, the locking mechanism 2 has a multidirectional constraint function, which ensures the stability of the space reference of the drill bit-height gauge system during the measurement process. Specifically, the locking structure 2 includes a base ring 2-1 arranged on the reference platform 1, a vertical plate 2-2 arranged on the base ring 2-1 and used for realizing the axial positioning of the drill bit, and a clamp assembly 2-3 arranged on the top of the vertical plate 2-2 and used for the radial rigid limiting of the drill bit.

[0036] Specifically, the cone-palette assembly includes a cone and a palette, wherein the cone is a core working component of the cone bit, usually in a conical structure, with hard alloy teeth embedded on the surface, and is a key element for efficient rock breaking in drilling, mining and other engineering projects through rolling, impact and shearing action. The palette (also known as bearing seat or cone shell) is a key component connecting the bit body and the cone, usually in a ring or bowl shape, with a bearing system installed inside and cooperating with the cone to form a rotating support foundation for the cone.

[0037] As shown in Figure 2 , the cone-palette assembly cannot completely match the clamp assembly 2-3 due to its special shape, and has a gap after installation. In order to further fix the palette and suppress the drift of the reference surface, the locking mechanism 2 further includes tightening bolts 2-4 arranged on the clamp assembly 2-3 and used for fastening the cone-palette assembly. In use, the clamp assembly 2-3 is fixed by the vertical plate 2-2, the base ring 2-1 and the reference platform 1, the base ring 2-1 is locked by the bolts and the reference platform 1, the upper two tightening bolts 2-4 fix the palette, and the vertical plate 2-2 and the base ring 2-1 realize the axial and radial rigid fixation of the drill bit, thereby suppressing the drift of the reference surface. The locking structure 2 can also ensure that the three cone-palette assemblies assembled are at the same height. As a preferred embodiment, three sets of tightening bolts 2-4 are selected and arranged uniformly along the circumference of the clamp assembly 2-3 to maximize the stability of the palette clamping.

[0038] The prior art uses a single clamp plus bolt to fix the cone-palette assembly, but cannot fix the cone-palette assembly at the same level. In order to solve this technical problem, as shown in Figure 3 , the clamp assembly 2-3 includes a first clamp 2-3-1 and a second clamp 2-3-2 arranged in parallel. Correspondingly, the first clamp 2-3-1 and the second clamp 2-3-2 are both provided with tightening bolts 2-4. By using two clamps one above the other and combining with the contact with the reference platform 1, the relative positions of all the cone-palette assemblies are ensured to be consistent, and precise palette positioning is realized.

[0039] Usually, manual rotation and height gauge measurement are adopted, however, visual error (±0.15mm) of manual reading and change of contact point position caused by manual rotation of drill bit result in dispersion of single tooth position measurement data exceeding process allowable value (±0.1mm). In order to control measurement repeatability error within ±0.03mm, as shown in Figures 4-5 The rotation structure is arranged on the reference platform 1 and used for driving index rotation of the drill bit. The rotation structure comprises a core column 4-1 used for supporting rotation of the drill bit and a thrust ball bearing 4-2 used for driving rotation of the drill bit. A groove for mounting the thrust ball bearing 4-2 is formed on the reference platform 1, and the core column 4-1 is arranged at a center position of the groove. In use, the drill bit is placed on the thrust ball bearing 4-2. Due to self weight of the drill bit, the thrust ball bearing 4-2 can drive rotation of the drill bit when the drill bit is manually rotated, thereby saving labor. The core column 4-1 is matched with an inner hole of a thread of the drill bit, and swing of the drill bit is limited during rotation.

[0040] Due to length of a height gauge probe (conventional probe effective stroke < 50mm) and structural features of the drill bit, the existing probe cannot contact the far distance roller tooth and PDC tooth (polycrystalline diamond compact tooth). In order to solve the technical problem, a self-adaptive sliding measurement module is provided, and detection of each feature point is realized by directional movement of a contact type probe. As shown in Figures 6-7 As a specific embodiment, the measurement assembly 3 comprises a base 3-1, a height gauge 3-2 arranged on the base 3-1 and an extended probe 3-3 arranged on a top of the height gauge 3-2 and used for contacting a highest point of the tooth position. Specifically, a guide groove structure is arranged on the reference platform 1, and the base 3-1 is mounted in the guide groove structure. In use, the base 3-1 is matched with the guide groove structure to realize fixation of a horizontal reference surface, the height gauge 3-2 can be slid according to a detection position, thereby realizing self-adaptive adjustment, and in addition, the extended probe 3-3 can completely cover detection of all tooth positions. In order to reduce error of manual reading, a digital display module 3-4 is mounted on the height gauge 3-2. The extended probe 3-3 contacts each highest point of the tooth position along a preset path, and the digital display module 3-4 displays a height value.

[0041] The extended probe 3-3 is solved by physical extension + high-precision design, and limitation of the conventional probe in range and adaptability is solved, and meanwhile, measurement precision (such as 0.02cm level) is maintained by structure optimization.

[0042] The extended probe 3-3 and the digital display module 3-4 are both conventional structures in the prior art and do not belong to the innovation points of the utility model, and are not described herein again.

[0043] In use, the following steps are adopted:

[0044] (1) drill bit is fixed to locking mechanism 2, through the rotation structure drive drill bit index rotation;

[0045] (2) measuring assembly 3 along the preset path contact each tooth position highest point, digital display module 3-4 display height value.

[0046] The utility model discloses through locking structure, measuring assembly and rotation structure cooperation, realize the stability of reference promotion: locking mechanism will measure the repeatability error from ±0.3mm drop to ±0.03mm;Full tooth position detection: adaptive measuring head covers 100% tooth position, and the detection efficiency is improved 40%;Automation control: artificial intervention reduces 90%, and data dispersion degree is ≤±0.05mm and reading accuracy guarantee: digital display module reduces reading error.

[0047] The above, only is the preferred embodiment of the utility model, and is not to the utility model in any form on the limit, although the utility model has disclosed as above with the preferred embodiment, however is not used to limit the utility model, any person skilled in the art, in the range of the utility model technical scheme, when can utilize the technical content disclosed above make a little more change or modification is equivalent variation equivalent embodiment, but whatever is not to the utility model technical scheme content, according to the technical essence of the utility model to the above embodiment of any brief introduction modification, equivalent variation and modification, all still belong to the range of the utility model technical scheme.

Claims

1. A drag shoe positioning measurement device, characterized by, Comprise: A reference platform (1); A locking structure (2) for clamping the drill bit arranged on the reference platform (1); And a measuring assembly (3) for measuring the height of the drill bit installed on the locking structure (2) arranged on the reference platform (1).

2. The drag pad alignment measurement device of claim 1, wherein, The locking structure (2) comprises: A base ring (2-1) arranged on the reference platform (1), a vertical plate (2-2) for realizing axial limiting of the drill bit arranged on the base ring (2-1), and a clamp assembly (2-3) for radial limiting of the drill bit arranged on the top of the vertical plate (2-2).

3. The drag pad alignment measurement device of claim 2, wherein, Further comprising: A tightening bolt (2-4) for fastening the gage arranged on the clamp assembly (2-3).

4. The drag pad alignment measurement device of claim 1, wherein, Further comprising: A rotating structure for driving the index rotation of the drill bit arranged on the reference platform (1).

5. The drag pad alignment measurement device of claim 4, wherein, The rotating structure comprises: a core column (4-1) for supporting the drill bit to limit the swing of the drill bit, and a thrust ball bearing (4-2) for driving the rotation of the drill bit.

6. The drag pad alignment measurement device of claim 1, wherein, The measuring assembly (3) comprises: A base (3-1); A height scale (3-2) arranged on the base (3-1); And an extended measuring head (3-3) arranged on the top of the height scale (3-2) for contacting the highest point of the gage of the cone bit.

7. The drag pad alignment measurement device of claim 2, wherein, The clamp assembly (2-3) comprises a first clamp (2-3-1) and a second clamp (2-3-2) arranged in parallel.

8. The drag pad alignment measurement device of claim 7, wherein, The first clamp (2-3-1) and the second clamp (2-3-2) are both circumferentially and uniformly provided with a plurality of tightening bolts (2-4) for pressing the gage.

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