Hob blade contour sampling device

Abstract

The utility model relates to the technical field of tunnel boring machine hob detection, in particular to a hob blade contour sampling device which comprises a positioning box, a fixing part and a plurality of tooth needles, the tooth needles are in sliding connection with the positioning box, located on the inner side of the positioning box and penetrate through the positioning box, the fixing part is in threaded connection with the positioning box and abuts against the tooth needles, and the positioning box is provided with a sliding groove. The sliding groove is matched with the gear pin. After the hob is abraded, the positioning box is arranged at the top of the hob, then the fixing piece is unscrewed, the tooth needles slide in the sliding grooves in the positioning box, then the tooth needles abut against the hob blade under the gravity effect, after all the tooth needles make contact with the hob blade, the fixing piece is screwed tightly, the tooth needles in the sliding grooves are extruded by the fixing piece, and the hob blade is fixed. And at the moment, the form of the gear needle is recorded to be the abrasion outline of the blade of the hob, and the purpose of guaranteeing the measurement precision is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of roller cutter detection for tunnel boring machines, in particular to a roller cutter blade profile sampling device. Background Art

[0002] Tunnel boring machines, including shield machines or hard rock tunnel boring machines (TBM), are a major construction machine for excavating tunnels in rock formations, and the cutter is the core component of the tunnel boring machine for breaking rock. During the construction of the tunnel boring machine, the cutter directly bears the rock breaking load, so the cutter will wear out during its long-term use. If the cutter that is abnormally worn or worn to the limit cannot be replaced in time, it will affect the construction efficiency of the tunnel boring machine and cause damage to nearby cutters, resulting in additional economic losses. Therefore, the measurement of the wear state of the cutter is very critical in the construction process of the tunnel boring machine, and can provide an important reference for the timely replacement of the cutter, the prediction of cutter wear and the project construction.

[0003] At present, the device for manually measuring the wear of the hob in engineering mainly uses a hob caliper. The caliper is prepared according to the contour of the new hob. After it is clamped on the worn hob blade, a gap is formed between the worn area of ​​the hob and the caliper contour. The value of the gap along the hob radius is the wear of the hob. This measuring tool can only measure the minimum wear value of the hob, and the hob blade is a curved surface or plane with a certain width. It presents different wear blade profiles under the influence of strata and excavation parameters. Analysis of the wear blade profile can be of great reference significance for the refined evaluation of excavation parameters and the reduction of abnormal wear of the hob. The existing hob wear measurement caliper cannot measure the hob profile and lacks accurate evaluation of the hob wear morphology, which ultimately affects the decision of hob replacement. Utility Model Content

[0004] The utility model aims to provide a hob cutter blade profile sampling device, which solves the problem that the existing hob cutter caliper cannot measure the hob cutter profile and lacks accurate evaluation of the hob cutter wear morphology, which ultimately affects the decision of hob cutter replacement.

[0005] To achieve the above-mentioned purpose, the utility model provides a roller cutter blade profile sampling device, including a positioning box, a fixing member and a plurality of tooth pins, the plurality of tooth pins are slidably connected to the positioning box, are located on the inner side of the positioning box, and pass through the positioning box, the fixing member is threadedly connected to the positioning box and abuts against the tooth pins, the positioning box has a slide groove, and the slide groove cooperates with the tooth pins.

[0006] Wherein, the hob cutter blade profile sampling device further comprises two positioning blocks, which are detachably connected to the positioning box and are located on one side of the positioning box.

[0007] Wherein, the positioning block has a connecting protrusion, and the connecting protrusion is arranged on the positioning block and located on one side of the positioning block.

[0008] Wherein, the positioning block has a contour bevel, the contour bevels on the two positioning blocks are symmetrically arranged, and the contour bevels cooperate with the hob cutter ring.

[0009] Wherein, the hob is a standard hob.

[0010] The utility model provides a roller cutter blade profile sampling device. When the roller cutter is worn, the positioning box is placed on the top of the roller cutter, and then the fixing piece is loosened to make a plurality of the gear pins slide in the slide groove on the positioning box, and then the gear pins are brought into contact with the roller cutter blade under the action of gravity. After all the gear pins are in contact with the roller cutter blade, the fixing piece is tightened to make the fixing piece squeeze the gear pins in the slide groove, thereby fixing the gear pins. At this time, the shape of the gear pins is recorded as the wear profile of the roller cutter blade. The roller cutter blade profile sampling device provided by the utility model can match various types of roller cutter blade forms, can quickly sample the profile of the worn roller cutter blade, has high sampling accuracy, and ensures measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0012] Figure 1 It is a schematic diagram of the overall structure of the hob blade profile sampling device of the utility model.

[0013] Figure 2 It is a structural schematic diagram of a positioning box of the utility model.

[0014] Figure 3 It is a structural schematic diagram of a positioning block of the utility model.

[0015] Figure 4 It is a structural schematic diagram of the tooth pin of the utility model.

[0016] Figure 5 It is a structural schematic diagram of a hob of the utility model.

[0017] In the figure: 1-positioning block, 2-positioning box, 3-tooth pin, 4-fixing piece, 5-hob, 6-connecting protrusion, 7-contour slope, 8-slide groove. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0019] See also Figures 1 to 5 ,in Figure 1 It is a schematic diagram of the overall structure of the hob blade profile sampling device. Figure 2 This is a schematic diagram of the positioning box structure. Figure 3 It is a schematic diagram of the structure of the positioning block. Figure 4 It is a schematic diagram of the structure of the gear pin. Figure 5 It is a structural schematic diagram of a hob of the utility model.

[0020] The utility model provides a roller cutter blade profile sampling device, including a positioning box 2, a fixing member 4, a plurality of tooth pins 3 and two positioning blocks 1, wherein the positioning block 1 has a connecting protrusion 6 and a profile slope 7, and the plurality of tooth pins 3 abut against the roller cutter 5 blade, thereby obtaining a measurement value of a corresponding position and improving measurement accuracy. It can be understood that the aforementioned scheme can be used to improve the measurement accuracy of the roller cutter 5 profile, and can also be used to solve the problem of positioning the positioning box 2.

[0021] According to the present specific embodiment, the plurality of tooth pins 3 are slidably connected with the positioning box 2 and are located inside the positioning box 2 and penetrate the positioning box 2. The fixing member 4 is threadedly connected with the positioning box 2 and abuts against the tooth pins 3. The positioning box 2 has a slide groove 8, and the slide groove 8 cooperates with the tooth pins 3. The tooth pins 3 are made of a 0.5 mm × 0.5 mm square steel ruler. The plurality of tooth pins 3 form a contour sampling unit. The positioning box 2 is rectangular and is used to assemble the tooth pins 3. The tooth pins 3 can slide in the slide groove 8 on the positioning box 2. When the hob 5 is worn, the positioning box 2 is placed on top of the hob 5, and then Loosen the fixing part 4 to make the plurality of gear pins 3 slide in the slide groove 8 on the positioning box 2, and then make the gear pins 3 abut against the blade of the roller cutter 5 under the action of gravity. After all the gear pins 3 are in contact with the blade of the roller cutter 5, tighten the fixing part 4 to make the fixing part 4 squeeze the gear pins 3 in the slide groove 8, so as to fix the gear pins 3. At this time, the shape of the gear pins 3 recorded is the wear profile of the blade of the roller cutter 5. The roller cutter blade profile sampling device provided by the utility model can match various types of roller cutter blade forms, and can quickly sample the profile of the worn roller cutter blade with high sampling accuracy to ensure measurement accuracy.

[0022] The two positioning blocks 1 are detachably connected to the positioning box 2 and are located on one side of the positioning box 2 .

[0023] Secondly, the contour bevels 7 on the two positioning blocks 1 are symmetrically arranged, and the contour bevels 7 cooperate with the cutter ring of the hob 5 .

[0024] During the measurement process, the two positioning blocks 1 are clamped on both sides of the cutting ring of the hob 5, so that the positioning blocks 1 can locate the position of the positioning box 2. At this time, a number of gear pins 3 are located between the two positioning blocks 1, and then a number of gear pins 3 are positioned, which makes it convenient for the staff to align the gear pins 3 with the blade of the hob 5, while further improving the accuracy of the measurement.

[0025] At the same time, the connecting protrusion 6 is arranged on the positioning block 1 and is located on one side of the positioning block 1. The positioning block 1 is positioned with an L-shaped connecting protrusion 6, and a connecting groove (not shown in the figure) matching with the connecting protrusion 6 is arranged on the inner side of the positioning box 2, so that the connecting protrusion 6 on the positioning block 1 can be connected to the connecting groove by interference fit, which is convenient for replacing the positioning blocks 1 of different shapes, and then adapting to different hobs 5.

[0026] The utility model uses a plurality of the tooth needles 3 to form a profile sampling unit, and samples the blade profile of the hob 5 through the profile sampling unit. The structure is simple, and the sampling steps are simple and fast, which greatly improves the sampling efficiency and has high sampling accuracy, which is convenient for the subsequent measurement of the wear profile of the hob 5 and ensures the measurement accuracy of the hob wear amount.

[0027] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A hob cutter blade profile sampling device, characterized in that: It includes a positioning box, a fixing part and a plurality of gear pins, wherein the plurality of gear pins are slidably connected to the positioning box, are located on the inner side of the positioning box, and pass through the positioning box, the fixing part is threadedly connected to the positioning box and abuts against the gear pins, and the positioning box has a slide groove, which cooperates with the gear pins.

2. The hob cutter blade profile sampling device according to claim 1, characterized in that: The hob cutter blade profile sampling device further comprises two positioning blocks, which are detachably connected to the positioning box and are located on one side of the positioning box.

3. The hob cutter blade profile sampling device according to claim 2, characterized in that: The positioning block has a connecting protrusion, and the connecting protrusion is arranged on the positioning block and located at one side of the positioning block.

4. The hob cutter blade profile sampling device according to claim 3, characterized in that: The positioning block has a contour bevel, the contour bevels on the two positioning blocks are symmetrically arranged, and the contour bevels cooperate with the hob cutter ring.

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