Scaling hob tool for milling machine

Abstract

The utility model discloses a scaling hob tool for a milling machine, which is characterized in that the scaling hob tool comprises a cutter handle part and a hob part, the cutter handle part is provided with a mounting part, and the mounting part is matched with a BT interface or a CAT interface of the milling machine; the hobbing cutter part comprises a scaling hobbing cutter and a supporting rod; the cutter handle part is connected with the hobbing cutter part through a detachable connecting structure. The hobbing cutter part comprises a supporting rod, the front end part of the supporting rod is radially connected with a cutter shaft, fixed sleeves are respectively arranged on the cutter shaft on two sides of the supporting rod at intervals, and a scaling hobbing cutter is arranged on the cutter shaft between the fixed sleeves; by controlling the axial position of the interval between the fixed sleeves, the axial position of the scaling hob can be controlled, and the axial positions of different TBM hobs can be conveniently simulated. According to the utility model, rapid installation with the milling machine main shaft is realized through the standardized cutter handle interface, and the adaptability is strong; the split type design supports independent replacement of the hob part, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering construction and mechanical manufacturing technical field, especially convenient installation on the reduced scale cutter tool of milling machine. BACKGROUND

[0002] The reduced scale cutter refers to the actual TBM (tunnel boring machine) cutter size (usually 1:5 to 1:10) according to the proportion reduction, retains its cutting tooth shape, material characteristics and mechanical similarity, and is used for the cutter in laboratory or small-scale test environment.

[0003] The reduced scale cutter needs to be installed on the milling machine for the following reasons:

[0004] 1. Function verification: simulate the rock breaking process of TBM cutter on the milling machine, verify the cutter design, cutting performance and service life.

[0005] 2. Cost control: no need to build full-size TBM test bench, reduce R&D cost.

[0006] 3. Flexibility: adapt to the standardized interface of milling machine, facilitate quick cutter replacement and parameter adjustment.

[0007] The installation problem of the TBM cutter directly reduced in proportion lies in poor structural adaptability, and the TBM cutter design includes complex cutter disc interface and power transmission structure (such as flange, hydraulic drive), which cannot match the standard cutter handle (such as BT interface or CAT interface) of the milling machine spindle after direct reduction.

[0008] In addition to the interface adaptability, the inventor also improves the following prior art deficiencies when designing the reduced scale cutter tool for milling machine:

[0009] 1. The traditional reduced scale cutter adopts integral structure, and the cutter and the cutter handle are fixedly connected, so that the worn parts cannot be replaced alone.

[0010] 2. The axial position of the traditional reduced scale cutter cannot be adjusted, and the cutter position in different TBM application environments cannot be flexibly simulated.

[0011] 3. The traditional reduced scale cutter lacks protection structure, and debris is easy to splash and damage equipment or operators. UTILITY MODEL CONTENTS

[0012] The utility model aims at the deficiencies in the prior art, and designs a reduced scale cutter tool for milling machine, which is convenient to install the reduced scale cutter on the milling machine, and then drives the reduced scale cutter to rotate through the milling machine to simulate the cutter working condition in the TBM tunneling process.

[0013] In order to realize the above-mentioned purpose, the milling machine scale-down hobbing tool comprises a tool shank part and a hobbing part, the tool shank part is provided with a mounting part, the mounting part is matched with a BT interface or a CAT interface of the milling machine; the hobbing part comprises a scale-down hobbing tool and a supporting rod; the tool shank part and the hobbing part are connected through a detachable connecting structure.

[0014] The tool shank part comprises a pull pin, a tool shank main body and a connecting bolt;

[0015] The pull pin is fixed to the end of the tool shank main body and is used for being connected with the main shaft of the milling machine in tension; the tool shank main body is fixedly connected with a tool shank butt joint disc at the opposite end of the pull pin, and the connecting bolt is used for connecting the tool shank butt joint disc and the hobbing part;

[0016] The direction from the pull pin to the tool shank butt joint disc is the front direction;

[0017] The middle front part of the tool shank main body is radially protruded and connected with a limiting disc, and the limiting disc is used for limiting.

[0018] The hobbing part comprises the supporting rod, the rear end of the supporting rod is fixedly connected with a hobbing butt joint disc, and the hobbing butt joint disc is connected with the tool shank butt joint disc in correspondence;

[0019] The front end of the supporting rod is radially connected with a tool shaft, the tool shaft passes through the supporting rod, two fixed sleeves are respectively arranged on the tool shaft at the two sides of the supporting rod, and the scale-down hobbing tool is arranged on the tool shaft between the two fixed sleeves; the two fixed sleeves are used for limiting the axial position of the scale-down hobbing tool.

[0020] The hobbing butt joint disc and the tool shank butt joint disc are detachably connected through the connecting bolt.

[0021] Further, a protection box is arranged, the front end of the protection box is opened, the rear side wall of the protection box is embedded between the tool shank butt joint disc and the hobbing butt joint disc, the connecting bolt passes through the tool shank butt joint disc, the rear side wall of the protection box and the hobbing butt joint disc, the big end of the connecting bolt is tightly pressed against the tool shank butt joint disc, and a nut for tight pressing and fixing is arranged at the end of the connecting bolt extending into the protection box.

[0022] The left end and the right end of the tool shaft pass through the left side wall and the right side wall of the protection box respectively and are respectively connected with nuts for tight pressing and fixing.

[0023] The utility model has the advantages of:

[0024] The utility model realizes the quick installation with the main shaft of the milling machine through the standardized tool shank interface (BT / CAT), has strong adaptability, supports the independent replacement of the hobbing part through the split type design and reduces the maintenance cost.

[0025] The pull pin and the limiting disc ensure the stability and convenience of the tool installation; the tool shank main body is connected with the hobbing part through the tool shank butt joint disc and the connecting bolt, the axial positioning of the supporting rod is simplified, and the transmission precision is improved.

[0026] By controlling the axial position of the interval between the fixed sleeve, the axial position of the reduced ratio cutter can be controlled, facilitating the simulation of different axial positions of the TBM cutter by adopting fixed sleeves of different lengths, without the need to manufacture a specific cutter shaft and a reduced ratio cutter fixedly connected with the cutter shaft for each different axial position of the cutter.

[0027] The cutter interface disc and the cutter handle interface disc are detachably connected through the connecting bolt 3, facilitating the separate replacement of the cutter handle part or the reduced ratio cutter, and through the replacement of different reduced ratio cutters or the control of the axial position of the reduced ratio cutter, different TBM working conditions can be matched and simulated, the adaptability of the utility model is enhanced, and the high cost caused by overall replacement is reduced.

[0028] The protection box and the cutter shaft form a close fixed structure and cover the cutter shaft and the reduced ratio cutter, and most of the splashed debris can be blocked during cutting, avoiding the damage of the splashed debris to personnel and materials in the experimental environment. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic view of the utility model. Figure 1 The up-down direction in the figure is the left-right direction in the utility model. Figure 1 The right direction in the figure is the front direction in the utility model.

[0030] Figure 2 is an A-A sectional view of Figure 1 .

[0031] Figure 3 is a B-B sectional view of Figure 1 .

[0032] Figure 4 is a three-dimensional structural schematic view of the utility model. DETAILED DESCRIPTION

[0033] As shown in Figures 1 to 4 , the reduced ratio cutter tool for milling machine of the utility model comprises a cutter handle part and a cutter part, the cutter handle part has a mounting portion, the mounting portion is adapted to the BT interface or CAT interface of the milling machine; the cutter part comprises a reduced ratio cutter 1 and a supporting rod 2; the cutter handle part and the cutter part are connected through a detachable connection structure.

[0034] The utility model realizes the quick installation with the milling machine main shaft through the standardized cutter handle interface (BT / CAT), and has strong adaptability; the split type design supports the independent replacement of the cutter part, and reduces the maintenance cost.

[0035] The cutter handle part comprises a draw bolt 4, a cutter handle main body 5 and a connecting bolt 6; the mounting portion comprises the conical portion of the draw bolt 4 and the cutter handle main body 5.

[0036] The pull rod 4 is fixed at the end of the tool holder body 5, and is used for tension connection with the main shaft of the milling machine; the tool holder body 5 has a conical portion, and the tool holder body 5 at the opposite end of the pull rod 4 is fixedly connected with a tool holder butt joint disc 7; and the connecting bolt 6 is used for connecting the tool holder butt joint disc 7 and the hob portion;

[0037] The direction from the pull rod 4 to the tool holder butt joint disc 7 is the front direction;

[0038] The middle front part of the tool holder body 5 is radially protruded to be connected with a limiting disc 8, and the limiting disc 8 is used for limiting installation.

[0039] The pull rod 4 and the limiting disc 8 ensure the stability and convenience of the cutter installation; the tool holder body 5 is connected with the hob portion through the tool holder butt joint disc 7 and the connecting bolt 6, thereby simplifying the axial positioning of the support rod 2 and improving the transmission accuracy.

[0040] The hob portion comprises the support rod 2, which is made of high-strength aluminum alloy, and the light-weight design reduces the load of the main shaft of the milling machine;

[0041] The support rod 2 is fixedly connected with a hob butt joint disc 9 at the rear end, and the hob butt joint disc 9 is correspondingly connected with the tool holder butt joint disc 7;

[0042] The support rod 2 is radially connected with a tool shaft 10 at the front end, the tool shaft 10 penetrates through the support rod 2, two fixed sleeves 11 are respectively arranged on the tool shaft 10 at the two sides of the support rod 2, and the hob 1 is arranged on the tool shaft 10 between the two fixed sleeves 11; the two fixed sleeves 11 are used for limiting the axial position of the hob 1. In the embodiment, the two fixed sleeves 11 adjacent to the support rod 2 can be combined into one fixed sleeve, and the fixed sleeve penetrates through the support rod 2 together with the tool shaft 10. The structure transformation does not change the essential function, and also falls within the protection scope of the present application.

[0043] The axial position of the hob 1 can be controlled by controlling the interval between the two fixed sleeves 11, and different axial positions of different TBMs can be simulated by using different lengths of the fixed sleeves, so that the specific tool shaft 10 and the hob 1 fixedly connected with the tool shaft 10 need not be separately manufactured for each kind of hob with different axial positions.

[0044] The hob butt joint disc 9 and the tool holder butt joint disc 7 are detachably connected together through the connecting bolt 6.

[0045] The cutter interface disc 9 and the tool holder interface disc 7 are detachably connected through the connecting bolts 6, so that the tool holder part or the reduced ratio cutter 1 can be individually replaced, different reduced ratio cutters 1 can be replaced or the reduced ratio cutter 1 is located at different axial positions, different TBM working conditions can be simulated, the adaptability of the utility model is enhanced, and the high cost caused by the overall replacement is reduced.

[0046] The protective box 3 is further included, the front end of the protective box 3 is open, the rear side wall of the protective box 3 is embedded between the tool holder interface disc 7 and the cutter interface disc 9, the connecting bolts 6 pass through the tool holder interface disc 7, the rear side wall of the protective box 3 and the cutter interface disc 9, and the big end of the connecting bolts 6 is tightly pressed against the tool holder interface disc 7, and the end of the connecting bolts 6 extending into the protective box 3 is provided with a nut for tightly pressing and fixing.

[0047] The left and right ends of the cutter shaft 10 pass through the left and right side walls of the protective box 3 and are respectively connected with nuts for tightly pressing and fixing. The cutter shaft 10 is a screw rod, and the two ends of the cutter shaft 10 are connected with the nuts, or one end is a big end and the other end is connected with the nut. The structure transformation is equivalent to replacement, and all falls within the protection scope of the utility model. The fixed sleeve can be provided with an internal thread, and the fixed sleeve is rotated to a specific axial position of the cutter shaft 10 for limiting the reduced ratio cutter 1.

[0048] The length of each fixed sleeve 11 and each reduced ratio cutter 1 and the diameter of the support rod 2 are substantially equal to the distance between the left and right side walls of the protective box 3, so that the axial positions of the reduced ratio cutters 1 are fixed.

[0049] The protective box 3 and the cutter shaft 10 form a close fixed structure and cover the cutter shaft 10 and the reduced ratio cutter 1, most of the splashing debris can be blocked during cutting, and the splashing debris can be prevented from causing damage to personnel and materials in the experimental environment.

[0050] Before use, the first step is to assemble and adjust the cutter part.

[0051] Firstly, the positions of the fixed sleeves 11 are adjusted. The nuts at the left and right ends of the cutter shaft 10 are loosened, the cutter shaft 10 is taken out, the fixed sleeves 11 with a length matched with the length required by the predetermined experiment are selected, so that the interval positions between the fixed sleeves 11 (i.e. the mounting positions of the reduced ratio cutters 1) are matched with the positions designed in the experiment; the fixed sleeves 11 and the reduced ratio cutters 1 are alternately mounted on the cutter shaft 10, the specific axial positions of the reduced ratio cutters 1 are accurately controlled, the axial displacement of the reduced ratio cutters 1 during cutting is ensured, and the reduced ratio cutter 1 capable of simulating the specific TBM cutter disc layout is obtained. The above process can be flexibly adapted to multiple working conditions, the cutter shaft 10 does not need to be customized for each specific TBM cutter disc layout, the experimental cost and the replacement and maintenance cost of the reduced ratio cutter 1 (the cutter shaft 10, the protective box 3 and other structures do not need to be replaced) are saved. The cutter shaft 10 is mounted into the protective box 3, the left and right ends of the cutter shaft 10 pass through the protective box 3 and the nuts are tightened.

[0052] Operation of the detachable connection structure is performed again:

[0053] The cutter interface disc 9 at the rear end of the support rod 2 of the cutter part is aligned with the tool holder interface disc 7, the rear side wall of the protective box 3 is clamped between the cutter interface disc 9 and the tool holder interface disc 7, and then the tool holder interface disc 7, the rear side wall of the protective box 3 and the cutter interface disc 9 are fixed by the connecting bolts 6, so that the mechanical connection of the tool holder part and the cutter part is completed.

[0054] The second step is tool installation.

[0055] The tool holder part is inserted into the BT or CAT interface of the milling machine spindle, and is fixed by the spindle tensioning mechanism, so that the tool holder body 5 is coaxial with the milling machine spindle. The limiting disc 8 of the tool holder body 5 is in contact with the end face of the milling machine spindle, so as to limit the axial displacement and improve the installation stability. Through the standardized interface (BT / CAT), the utility model has strong adaptability and is convenient to install; the limiting disc 8 is designed to avoid the tool from deviating in high-speed rotation, and ensures the transmission accuracy.

[0056] The third step is a simulation TBM cutter cutting experiment.

[0057] According to the target working condition (such as hard rock or soft rock), the spindle speed, the feed speed and the cutting depth are set in the milling machine control system. The cooling system is started, and the cooling liquid (such as water-based cutting fluid) is sprayed to the scaled-down cutter 1.

[0058] The milling machine spindle drives the tool holder part to rotate, and the support rod 2 drives the cutter shaft 10 and the scaled-down cutter 1 to rotate at high speed. The rock sample (or simulated rock mass) is fed along the predetermined track, the scaled-down cutter 1 cuts the rock sample, and the actual rock breaking process of the TBM is simulated.

[0059] Working principle:

[0060] The scaled-down cutter 1 is reduced in size by equal ratio, retains the tooth shape and material properties, and ensures that the experimental data can reproduce the actual working condition; the scaled-down cutter 1 and the adjustable sleeve accurately simulate the stress characteristics of the TBM cutter; these mechanical similarities make the utility model have high simulation degree. The protective box 3 effectively prevents debris from splashing.

[0061] The fourth step is maintenance and adjustment after the experiment.

[0062] Tool disassembly and maintenance: after stopping, the connecting bolts 6 are loosened, and the tool holder part and the cutter part are separated.

[0063] The wear condition of the scaled-down cutter 1 is checked, and if replacement is needed, only the scaled-down cutter 1 needs to be replaced, without the whole being scrapped.

[0064] Working condition switching adjustment:

[0065] If next experiment needs to simulate different axial position hob, then reselect different length of fixed sleeve 11, reinstallation fixed sleeve 11 and reduced scale hob 1, make the utility model can multi-scene adaptation: by changing adjusting sleeve, the utility model can simulate a variety of TBM cutterhead layout.

[0066] The above examples are only used to illustrate but not to limit the technical solutions of the utility model, although the utility model is described in detail with reference to the above examples, ordinary skilled in the art should understand that: still can modify or equivalent replace to the utility model, and any modification or partial replacement that does not depart from the spirit and scope of the utility model, it should be covered in the utility model claim scope.

Claims

1. A reduced scale hobbing tool for a milling machine, characterised in that: The application relates to a tool holder and a hobbing tool, which comprises a tool holder part and a hobbing tool part.

2. A reduced scale hobbing tool for a milling machine according to claim 1, characterised in that: The tool holder part comprises a pull pin, a tool holder body and a connecting bolt. The pull pin is fixed to the end of the tool holder body and is used for tension connection with a milling machine spindle; the tool holder body is fixedly connected with a tool holder butt joint disc at the opposite end of the pull pin; and the connecting bolt is used for connecting the tool holder butt joint disc and the hobbing tool part. The direction from the pull pin to the tool holder butt joint disc is the front direction. The middle front part of the tool holder body is radially protruded and connected with a limiting disc, which is used for limiting.

3. A reduced scale hobbing tool for a milling machine according to claim 2, characterised in that: The hobbing tool part comprises a supporting rod, the rear end of which is fixedly connected with a hob butt joint disc which is correspondingly connected with the tool holder butt joint disc. The front end of the supporting rod is radially connected with a cutter shaft which penetrates the supporting rod; two fixed sleeves are respectively arranged on the cutter shaft at the left and right sides of the supporting rod; and the hob is arranged on the cutter shaft between the two fixed sleeves and is used for limiting the axial position of the hob.

4. A reduced scale hobbing tool for a milling machine according to claim 3, characterised in that: The hob butt joint disc and the tool holder butt joint disc are detachably connected through the connecting bolt.

5. A reduced scale hobbing tool for a milling machine according to claim 4, characterised in that: The application further comprises a protective box, the front end of which is open; the rear side wall of the protective box is embedded between the tool holder butt joint disc and the hob butt joint disc; the connecting bolt penetrates the tool holder butt joint disc, the rear side wall of the protective box and the hob butt joint disc; the big end of the connecting bolt is tightly pressed against the tool holder butt joint disc; and the end of the connecting bolt which extends into the protective box is provided with a nut which is used for tight pressing and fixing. The left and right ends of the cutter shaft respectively penetrate the left and right side walls of the protective box and are respectively connected with nuts which are used for tight pressing and fixing.

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