CN116378571A - Manufacturing method of hob bit suitable for trimming bottom rock face of large-diameter rock-socketed pile hole - Google Patents
Manufacturing method of hob bit suitable for trimming bottom rock face of large-diameter rock-socketed pile hole Download PDFInfo
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- CN116378571A CN116378571A CN202310415721.8A CN202310415721A CN116378571A CN 116378571 A CN116378571 A CN 116378571A CN 202310415721 A CN202310415721 A CN 202310415721A CN 116378571 A CN116378571 A CN 116378571A
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- 239000011435 rock Substances 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000009966 trimming Methods 0.000 title claims abstract description 10
- 238000005553 drilling Methods 0.000 claims abstract description 53
- 238000000227 grinding Methods 0.000 claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000003801 milling Methods 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 11
- 210000001503 joint Anatomy 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/08—Roller bits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
Abstract
The invention relates to the technical field of rock-socketed piles and discloses a manufacturing method of a hob bit suitable for trimming a rock face at the bottom of a large-diameter rock-socketed pile hole, which comprises the steps of providing a rotary drilling barrel, cutting picks and cones at the bottom of the rotary drilling barrel to form a barrel with an opening at the bottom; providing a bottom plate, wherein the bottom plate comprises a lower end surface and an upper end surface, a cutting insert hob and a roller bit are arranged on the lower end surface, the lower end surface is completely covered by grinding tracks of the cutting insert hob and the roller bit, the bottom of a cylinder body is welded and fixed on the upper end surface, and the bottom plate is covered on a bottom opening; through cutting pick and the cone excision of the bottom of the rotary drilling barrel on the rotary drilling rig, the bottom plate provided with the insert hob and the cone bit is welded on the bottom opening to form the rotary drilling hob bit, the combination of the rotary drilling barrel and the insert hob is realized, the rotary drilling hob bit carries out full-section trimming and grinding on concave-convex or stepped hole bottoms, the hole bottoms are smooth, pile sinking quality is guaranteed, and working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of rock-socketed piles, in particular to a manufacturing method of a hob bit suitable for trimming a rock face at the bottom of a large-diameter rock-socketed pile hole.
Background
In hard rock drilling of large-diameter rock-socketed piles with diameters of 1600mm or more, a grading reaming coring drilling or small-drill array coring drilling process is generally adopted. The step reaming drilling process adopts a small-diameter rotary drilling barrel drill bit to drill into the core from the center of the pile, gradually and step-wise enlarge the drilling diameter until the designed pile diameter is reached; the array coring drilling process of the small drill adopts the same small diameter cutting pick barrel drill, sequentially coring according to the array and adopting the whole one-time flattening drilling process of the designed pile diameter barrel drill.
However, the rotary drilling rig has the following problems that in the rock entering drilling process, the rotary drilling rig is affected by the development degree of rock mass cracks, different rock hardness and the like, no matter the rotary drilling rig adopts a grading reaming process or a small drill array coring process to drill, when the rock core is drilled for each time, the elevation of the bottom of the rock core has certain difference, and finally, after the hole is formed, the whole bottom of the hole is in a concave-convex or step shape.
In the prior art, aiming at the condition of uneven or step-shaped hole bottoms, coring drilling is adopted, so that the hole bottoms are not trimmed after the holes are drilled in the actual construction process, and certain hidden danger is brought to pile forming quality; or adopting a small-diameter barrel drill occlusion and fragmentation process, carrying out occlusion drilling through a plurality of hole sites by using the small-diameter barrel drill, carrying out fragmentation and flattening on the uneven rock surface of the hole bottom, repeatedly moving the position of the barrel in the process, and carrying out slag dragging on the hole bottom for many times, wherein the construction speed is low, and the treatment effect is poor; or the rotary drilling machine is adopted to configure the hob bit to drill in a rotary way to grind the hole bottom, but the drilling machine needs to be replaced in the construction, the process time is long, and the cost is high.
Disclosure of Invention
The invention aims to provide a manufacturing method of a hob bit suitable for finishing a bottom rock surface of a large-diameter rock-socketed pile hole, and aims to solve the problem that in the prior art, in the process of drilling hard rock of the large-diameter rock-socketed pile, the condition of uneven hole bottom after final hole is difficult to treat, so that pile forming quality is poor.
The invention discloses a manufacturing method of a hob bit suitable for trimming a bottom rock surface of a large-diameter rock-socketed pile hole, which comprises the following steps:
1) Providing a cylindrical rotary drilling barrel, and cutting picks and gear wheels at the bottom of the rotary drilling barrel to form a barrel body with an opening at the bottom;
2) Providing a bottom plate, wherein the bottom plate comprises a lower end face arranged downwards and an upper end face arranged upwards, a plurality of hob brackets and roller bits are arranged on the lower end face, and the hob brackets and the roller bits are arranged on the lower end face at intervals; the hob bracket comprises a base plate, wherein mounting frames which extend downwards are respectively arranged at two ends of the base plate, and the two mounting frames are arranged at intervals to form a mounting area;
a gear-inserted hob is arranged in the installation area, the gear-inserted hob comprises a strip-shaped hob shaft and a cylindrical hob barrel, two ends of the hob shaft are fixedly connected with a mounting frame through bolts respectively, the hob barrel which rolls around the hob shaft is sleeved in the middle of the hob shaft, a plurality of pointed milling heads are embedded on the outer surface of the hob barrel, and the milling heads are uniformly arranged on the hob barrel at intervals;
and horizontally rotating the bottom plate, wherein the moving track of the hob barrel forms a hob grinding track ring, the moving track of the roller bit forms a roller grinding track ring, and the plurality of hob grinding track rings and the plurality of roller grinding track rings completely cover the lower end face.
3) And the bottom of the cylinder body is welded and fixed on the upper end face, the bottom plate is covered on the bottom opening, and the bottom plate is fixedly connected with the cylinder body to form the hob bit.
Optionally, in the step 2), the bottom plate is cut to form a plurality of pressure relief holes, the pressure relief holes penetrate through the bottom plate from top to bottom, and the pressure relief holes, the hob bracket and the roller bit are arranged at intervals.
Optionally, the barrel is provided with a barrel wall in a surrounding shape, the barrel wall is enclosed to form a barrel cavity, the barrel cavity is provided with the bottom opening, and the outer surface of the barrel wall is welded with vertical ribs or circumferential ribs.
Optionally, the bottom frame of the mounting frame is provided with two mounting heads extending outwards, the two mounting heads are arranged at intervals to form a fixed area, and the end part of the cutter shaft passes through the fixed area to form a passing section;
the penetrating section is provided with a penetrating hole, the mounting head is provided with a mounting hole, the mounting hole and the penetrating hole are aligned to form an anchoring channel, and in the step 2), a bolt is penetrated in the anchoring channel to fixedly connect the penetrating section with the mounting head.
Optionally, in the step 3), the roller cone drill bit is disposed at the center and both sides of the lower end surface; the roller milling track ring covers the middle area and the peripheral area of the lower end face, and the roller milling track ring covers between the middle area and the peripheral area.
Optionally, in the step 3), a triangular steel frame is welded on the upper end face, the triangular steel frame includes a horizontal section arranged horizontally and a longitudinal section arranged longitudinally, the horizontal section is welded and fixed on the upper end face, and the longitudinal section is welded and fixed on the inner side wall of the cylinder.
Optionally, eight triangular plate steel frames are provided, and before the longitudinal sections are welded and fixed on the inner side wall of the cylinder, the eight triangular plate steel frames are welded and fixed on the upper end face respectively, and the eight triangular plate steel frames are uniformly arranged on the upper end face at intervals.
Optionally, the bottom of the cylinder has a bottom wall arranged downward; in the step 3), before the bottom of the cylinder is welded and fixed on the upper end face, an arc-shaped groove is formed on the upper end face by cutting according to the size of the bottom opening, the bottom wall is abutted on the bottom of the arc-shaped groove, and after an arc-shaped butt joint section is formed, inner side welding and outer side welding are performed along the extending direction of the butt joint section, so that the bottom plate is fixedly connected with the cylinder.
Optionally, the hob barrel has an inner end adjacent to the center of the bottom plate and an outer end facing away from the center of the bottom plate, and the cross section of the hob barrel gradually converges along the direction of the outer end toward the inner end;
the hob barrel is provided with a central hole, the central hole penetrates through the central shaft of the hob barrel, and the middle part of the hob shaft penetrates through the central hole; a plurality of arc-shaped tracks are arranged in the hob barrel, the arc-shaped tracks extend along the circumferential arc of the hob barrel, the arc-shaped tracks are arranged at intervals along the axial direction of the hob barrel, and the arc-shaped tracks are arranged in an isolated manner with the central shaft;
the automatic rolling device is characterized in that a counterweight rolling along the arc-shaped track is arranged in the arc-shaped track, when the hob barrel moves along the hob grinding track ring, the hob barrel rotates clockwise around the hob shaft, and when the counterweight moves to a set height, the counterweight moves downwards along the arc-shaped track under the action of gravity and is impacted on the arc-shaped track from top to bottom.
Optionally, along clockwise, the arc-shaped track comprises a front side end and a rear side end, the rear side end is connected with a limiting spring, the inner end of the limiting spring is connected to the rear side end, and the outer end of the limiting spring extends towards the extending direction of the arc-shaped track;
when the hob barrel starts to rotate from a static state, the weight piece impacts and butts against the limiting spring from top to bottom under the action of gravity, and the limiting spring is stressed to deform; when the weight piece moves to a set height, the weight piece impacts the front side end of the arc-shaped track from top to bottom under the action of elasticity and gravity; and along with the continuous rotation of the rotating cylinder, the weight piece is reset from the front side end to be pressed against the limiting spring.
Compared with the prior art, the manufacturing method of the hob bit suitable for trimming the bottom rock face of the large-diameter rock-socketed pile hole provided by the invention has the advantages that the bottom cutting pick and the cone of the rotary drilling drum on the rotary drilling machine are cut, the bottom plate provided with the insert hob and the cone bit is welded on the bottom opening to form the rotary drilling hob bit, the rotary drilling drum and the insert hob bit are combined, in actual construction, the rotary drilling drum is replaced by the rotary drilling hob bit after the rotary drilling drum is completed, the drilling machine is not required to be replaced, the rotary drilling hob bit is utilized to trim and grind the whole section of the concave-convex or stepped hole bottom, the hole bottom is smooth, the probability of exceeding the thickness of the hole bottom sediment is greatly reduced, the pile body quality is effectively improved, the direct cost of defective pile treatment is greatly saved, and the social benefit and economic benefit are remarkable.
Drawings
FIG. 1 is a schematic bottom view of a hob bit suitable for finishing a bottom rock face of a large-diameter rock-fill pile hole provided by the invention;
FIG. 2 is a schematic perspective view of a gear box hob according to the present invention;
FIG. 3 is a schematic perspective view of a hob bracket provided by the invention;
FIG. 4 is a schematic front view of a cartridge provided by the present invention;
FIG. 5 is a partial schematic view of the inside of a cartridge provided by the present invention;
FIG. 6 is a schematic cross-sectional view of a hob bit provided by the present invention;
FIG. 7 is a schematic cross-sectional view of a hob barrel provided by the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The implementation of the present invention will be described in detail below with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limiting the present invention, and specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
Referring to fig. 1-7, a preferred embodiment of the present invention is provided.
The invention provides a manufacturing method of a hob bit suitable for trimming a rock face at the bottom of a large-diameter rock-socketed pile hole, which comprises the following steps:
1) Providing a cylindrical rotary drilling barrel, cutting picks and roller cones at the bottom of the rotary drilling barrel, and forming a barrel body 100 with a bottom opening 101;
2) Providing a bottom plate 200, wherein the bottom plate 200 comprises a downward arranged lower end surface and an upward arranged upper end surface, a plurality of rolling supports 300 and roller bit 400 are arranged on the lower end surface, and the rolling supports 300 and the roller bit 400 are arranged on the lower end surface at intervals; the roll-to-support 300 comprises a base plate 300, wherein two ends of the base plate 300 are respectively provided with a mounting rack 301 which extends downwards, and the two mounting racks 301 are arranged at intervals to form a mounting area 302;
a gear-inserted hob 310 is arranged in the installation area 302, the gear-inserted hob 310 comprises a strip-shaped hob shaft 311 and a cylindrical hob barrel 312, two ends of the hob shaft 311 are fixedly connected with the installation frame 301 through bolts 305 respectively, the hob barrel 312 which rolls around the hob shaft is sleeved in the middle of the hob shaft 311, a plurality of pointed milling heads 313 are embedded on the outer surface of the hob barrel 312, and a plurality of milling heads 313 are uniformly arranged on the hob barrel 312 at intervals;
the bottom plate 200 is horizontally rotated, the moving track of the hob barrel 312 forms a hob grinding track ring, the moving track of the roller bit 400 forms a roller grinding track ring, and the plurality of hob grinding track rings and the plurality of roller grinding track rings completely cover the lower end face.
3) And welding and fixing the bottom of the cylinder 100 on the upper end surface, and sealing the bottom plate 200 on the bottom opening 101, wherein the bottom plate 200 is fixedly connected with the cylinder 100 to form the hob bit.
According to the manufacturing method of the hob drill bit suitable for trimming the bottom rock face of the large-diameter rock-socketed pile hole, provided by the manufacturing method, the bottom cutting pick and the cone of the rotary drilling drum on the rotary drilling rig are cut, the bottom plate 200 provided with the insert hob 310 and the cone drill bit 400 is welded on the bottom opening 101 to form the rotary drilling hob drill bit, the rotary drilling drum and the insert hob 310 are combined, in actual construction, after the rotary drilling drum is drilled, the rotary drilling drum is replaced by the rotary drilling hob drill bit, the drilling rig is not required to be replaced, the rotary drilling hob drill bit is utilized to trim and grind the whole surface of the concave-convex or stepped hole bottom, the hole bottom is smooth, the probability of exceeding the thickness of the hole bottom sediment is greatly reduced, the pile body quality is effectively improved, the direct cost of defective pile processing is greatly saved, and social benefit and economic benefit are remarkable.
And, the hob barrel 312 continuously rotates around the rolling shaft, and meanwhile, the milling head 313 with a pointed end is embedded on the hob barrel 312, so that in the drilling process of the rotary-digging hob bit, under the action of axial force, horizontal force and torque, the hob barrel 312 and the milling head 313 continuously mill and score hard rock and gradually embed into the rock, and squeeze and destroy the rock, thereby greatly improving the overall rock breaking drilling efficiency.
In step 2), the bottom plate 200 is cut to form a plurality of relief holes 201, the relief holes 201 penetrate through the bottom plate 200 from top to bottom, and the relief holes 201 are arranged at intervals with the rolling support 300 and the roller bit 400. Thus, the relief holes 201 are used to reduce pressure during drilling and improve overall rock breaking drilling efficiency.
The cylinder 100 has a circumferential cylinder wall, the cylinder wall encloses a cylinder cavity, the cylinder cavity has a bottom opening 101, and a vertical rib or circumferential rib 110 is welded on the outer surface of the cylinder wall. In this way, the overall strength of the cylinder 100 is improved.
The bottom frame of the mounting frame 301 has two outwardly extending mounting heads 303, and the two mounting heads 303 are arranged at intervals to form a fixing area 304, and the end of the cutter shaft 311 passes through the fixing area 304 to form a passing section.
The penetrating section is provided with a penetrating hole, the mounting head 303 is provided with a mounting hole, the mounting hole and the penetrating hole are aligned to form an anchoring channel, and in step 2), a bolt 305 is penetrated in the anchoring channel to fixedly connect the penetrating section with the mounting head 303. Therefore, the two ends of the cutter shaft 311 are fixed by rolling the support 300, and meanwhile, the rolling barrel sleeved in the middle of the cutter shaft 311 is used for grinding the hole bottom rock stratum in the drilling process of the rotary-digging hob drill bit, so that the drill can be replaced without replacing the drill, and the work efficiency is improved.
In step 3), roller cone drill bits 400 are disposed in the center of the lower end face as well as on both sides; the roller milling track ring covers the middle area and the peripheral area of the lower end surface, and the roller milling track ring covers between the middle area and the peripheral area. Thus, the full coverage of the lower end face is achieved, and the mounting bracket is used to mount the insert hob 310 on the lower end face, and the mounting bracket causes the grinding surface at the individual position to be missing, so that the roller bit 400 is used for supplementing, and the full coverage of the grinding track is ensured.
In step 3), a triangular steel frame 500 is welded on the upper end surface, the triangular steel frame 500 includes a horizontal section 501 horizontally arranged and a longitudinal section 502 longitudinally arranged, the horizontal section 501 is welded and fixed on the upper end surface, and the longitudinal section 502 is welded and fixed on the inner side wall of the cylinder 100. Thus, by using the triangle steel frame 500 to perform a connection function, the connection between the bottom plate 200 and the cylinder 100 is reinforced, and the stability of the connection is ensured.
Eight triangular steel frames 500 are provided, and before the longitudinal sections 502 are welded and fixed on the inner side wall of the cylinder body 100, the eight triangular steel frames 500 are respectively welded and fixed on the upper end face, and the eight triangular steel frames 500 are uniformly arranged on the upper end face at intervals. Thus, the eight triangular steel frames 500 are utilized to play a role in stabilizing and reinforcing, so that the integral connection strength between the bottom plate 200 and the cylinder 100 is ensured.
In this embodiment, the bottom of the cartridge 100 has a bottom wall disposed downwardly; in step 3), before the bottom of the cylinder 100 is welded and fixed to the upper end surface, an arc groove 102 is cut and formed on the upper end surface according to the size of the bottom opening 101, the bottom wall is abutted against the bottom of the arc groove 102 to form an arc butt joint section, and after the arc butt joint section is formed, inner side welding and outer side welding are performed along the extending direction of the butt joint section, so that the bottom plate 200 is fixedly connected with the cylinder 100. Like this, through utilizing arc wall 102 to play the effect of a location butt joint, convenient welding between barrel 100 and the bottom plate 200 has simultaneously adopted inside and outside double weld, outer lane welding round promptly, and welding round in the barrel cavity lateral wall has improved welding strength, has guaranteed the joint strength between barrel 100 and the bottom plate 200.
In this embodiment, barrel 312 has an inner end 3101 adjacent the center of base plate 200 and an outer end 3100 facing away from the center of base plate 200, the cross-section of barrel 312 converging gradually along the direction of outer end 3100 toward inner end 3101;
the hob barrel 312 is provided with a central hole, the central hole penetrates through the central shaft of the hob barrel 312, and the middle part of the hob shaft 311 penetrates through the central hole; a plurality of arc-shaped tracks 320 are arranged in the hob barrel 312, the arc-shaped tracks 320 extend along the circumferential arc of the hob barrel 312, the arc-shaped tracks 320 are arranged at intervals along the axial direction of the hob barrel 312, and the arc-shaped tracks 320 are arranged in an isolated manner from the central shaft;
the arc-shaped track 320 is internally provided with a counterweight 321 rolling along the arc-shaped track 320, when the hob barrel 312 moves along the hob grinding track ring, the hob barrel 312 rotates clockwise around the hob shaft 311, and when the counterweight 321 moves to a set height, the counterweight 321 moves downwards along the arc-shaped track 320 under the action of gravity and impacts on the arc-shaped track 320 from top to bottom.
The hob barrel 312 can roll along the center of the hob shaft 311, and an arc-shaped track 320 is arranged in the hob barrel 312, when the counterweight 321 moves to a set height, the counterweight 321 can strike on the arc-shaped track 320 under the action of gravity, so that the hob barrel 312 is driven to mill the hole bottom downwards.
In this embodiment, along the clockwise direction, the arc-shaped rail 320 includes a front side end and a rear side end, the rear side end is connected with a limiting spring 322, the inner end of the limiting spring 322 is connected to the rear side end, and the outer end of the limiting spring 322 extends toward the extending direction of the arc-shaped rail 320.
When the hob barrel 312 starts to rotate from a static state, the counterweight 321 impacts and butts against the limiting spring 322 from top to bottom under the action of gravity, and the limiting spring 322 is stressed to deform; when the weight 321 moves to a set height, the weight 321 impacts the front side end of the arc-shaped rail 320 from top to bottom under the action of elasticity and gravity; with continued rotation of the rotating drum, the weight 321 is returned from the front side end to be pressed against the limit spring 322. The limiting spring 322 can be used for limiting the weight 321 to directly strike on the rear side end, and after the weight 321 moves to a set height, the weight 321 can strike on the rear side end under the action of the elastic force of the limiting spring 322 and the gravity of the weight 321, so that the hob barrel 312 is driven to mill the hole bottom downwards.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The manufacturing method of the hob drill bit suitable for trimming the bottom rock surface of the large-diameter rock-socketed pile hole is characterized by comprising the following steps:
1) Providing a cylindrical rotary drilling barrel, and cutting picks and gear wheels at the bottom of the rotary drilling barrel to form a barrel body with an opening at the bottom;
2) Providing a bottom plate, wherein the bottom plate is provided with a lower end face arranged downwards and an upper end face arranged upwards, a plurality of hob brackets and roller bits are arranged on the lower end face, and the hob brackets and the roller bits are arranged on the lower end face at intervals; the hob bracket comprises a base plate, wherein mounting frames which extend downwards are respectively arranged at two ends of the base plate, and the two mounting frames are arranged at intervals to form a mounting area;
a gear-inserted hob is arranged in the installation area, the gear-inserted hob comprises a strip-shaped hob shaft and a cylindrical hob barrel, two ends of the hob shaft are fixedly connected with a mounting frame through bolts respectively, the hob barrel which rolls around the hob shaft is sleeved in the middle of the hob shaft, a plurality of pointed milling heads are embedded on the outer surface of the hob barrel, and the milling heads are uniformly arranged on the hob barrel at intervals;
and horizontally rotating the bottom plate, wherein the moving track of the hob barrel forms a hob grinding track ring, the moving track of the roller bit forms a roller grinding track ring, and the plurality of hob grinding track rings and the plurality of roller grinding track rings completely cover the lower end face.
3) And the bottom of the cylinder body is welded and fixed on the upper end face, the bottom plate is covered on the bottom opening, and the bottom plate is fixedly connected with the cylinder body to form the hob bit.
2. The method for manufacturing the hob bit suitable for finishing the bottom rock face of the large-diameter embedded pile hole according to claim 1, wherein in the step 2), the bottom plate is cut to form a plurality of pressure relief holes, the pressure relief holes penetrate through the bottom plate from top to bottom, and the pressure relief holes, the hob bracket and the hob bit are arranged at intervals.
3. The method for manufacturing the hob bit suitable for finishing the bottom rock face of the large-diameter rock-socketed pile hole according to claim 1, wherein the cylinder body is provided with a circular cylinder wall, the cylinder wall is enclosed to form a cylinder cavity, the cylinder cavity is provided with the bottom opening, and the outer surface of the cylinder wall is welded with vertical ribs or circular ribs.
4. The method for manufacturing the hob drill bit suitable for finishing the bottom rock face of the large-diameter rock-socketed pile hole according to claim 1, wherein the bottom of the mounting frame is provided with two mounting heads which extend outwards, a fixed area is formed between the two mounting heads in a spaced arrangement mode, and the end part of the hob shaft penetrates through the fixed area to form a penetrating section;
the penetrating section is provided with a penetrating hole, the mounting head is provided with a mounting hole, the mounting hole and the penetrating hole are aligned to form an anchoring channel, and in the step 2), a bolt is penetrated in the anchoring channel to fixedly connect the penetrating section with the mounting head.
5. The method for manufacturing a hob bit suitable for finishing a bottom rock face of a large-diameter rock-fill pile hole according to claim 1, wherein in said step 3), said hob bit is arranged at the center and at both sides of a lower end face; the roller milling track ring covers the middle area and the peripheral area of the lower end face, and the roller milling track ring covers between the middle area and the peripheral area.
6. The method for manufacturing the hob bit suitable for finishing the bottom rock face of the large-diameter embedded pile hole according to claim 1, wherein in the step 3), a triangular steel frame is welded on the upper end face, the triangular steel frame comprises a horizontal section arranged horizontally and a longitudinal section arranged longitudinally, the horizontal section is welded and fixed on the upper end face, and the longitudinal section is welded and fixed on the inner side wall of the cylinder body.
7. The method for manufacturing the hob bit suitable for finishing the bottom rock face of the large-diameter embedded pile hole according to claim 6, wherein eight triangular steel frames are provided, and are welded and fixed on the upper end face respectively before the longitudinal sections are welded and fixed on the inner side wall of the barrel body, and the eight triangular steel frames are uniformly arranged on the upper end face at intervals.
8. The method of manufacturing a hob bit suitable for finishing a bottom rock face of a large diameter rock-fill pile hole according to claim 7, wherein the bottom of said barrel has a bottom wall disposed downwardly; in the step 3), before the bottom of the cylinder is welded and fixed on the upper end face, an arc-shaped groove is formed on the upper end face by cutting according to the size of the bottom opening, the bottom wall is abutted on the bottom of the arc-shaped groove, and after an arc-shaped butt joint section is formed, inner side welding and outer side welding are performed along the extending direction of the butt joint section, so that the bottom plate is fixedly connected with the cylinder.
9. A method of manufacturing a hob bit suitable for use in the modification of the bottom rock face of a large diameter rock-fill pile hole according to any one of claims 1 to 8, wherein the hob barrel has an inner end adjacent the centre of the bottom plate and an outer end facing away from the centre of the bottom plate, the cross section of the hob barrel tapering in the direction of the outer end towards the inner end;
the hob barrel is provided with a central hole, the central hole penetrates through the central shaft of the hob barrel, and the middle part of the hob shaft penetrates through the central hole; a plurality of arc-shaped tracks are arranged in the hob barrel, the arc-shaped tracks extend along the circumferential arc of the hob barrel, the arc-shaped tracks are arranged at intervals along the axial direction of the hob barrel, and the arc-shaped tracks are arranged in an isolated manner with the central shaft;
the automatic rolling device is characterized in that a counterweight rolling along the arc-shaped track is arranged in the arc-shaped track, when the hob barrel moves along the hob grinding track ring, the hob barrel rotates clockwise around the hob shaft, and when the counterweight moves to a set height, the counterweight moves downwards along the arc-shaped track under the action of gravity and is impacted on the arc-shaped track from top to bottom.
10. The method for manufacturing the hob drill bit suitable for finishing the bottom rock surface of the large-diameter rock-socketed pile hole according to claim 9, wherein the arc-shaped track comprises a front side end and a rear side end along the clockwise direction, the rear side end is connected with a limit spring, the inner end of the limit spring is connected to the rear side end, and the outer end of the limit spring extends towards the extending direction of the arc-shaped track;
when the hob barrel starts to rotate from a static state, the weight piece impacts and butts against the limiting spring from top to bottom under the action of gravity, and the limiting spring is stressed to deform; when the weight piece moves to a set height, the weight piece impacts the front side end of the arc-shaped track from top to bottom under the action of elasticity and gravity; and along with the continuous rotation of the rotating cylinder, the weight piece is reset from the front side end to be pressed against the limiting spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310415721.8A CN116378571A (en) | 2023-04-12 | 2023-04-12 | Manufacturing method of hob bit suitable for trimming bottom rock face of large-diameter rock-socketed pile hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310415721.8A CN116378571A (en) | 2023-04-12 | 2023-04-12 | Manufacturing method of hob bit suitable for trimming bottom rock face of large-diameter rock-socketed pile hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116378571A true CN116378571A (en) | 2023-07-04 |
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ID=86967438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310415721.8A Pending CN116378571A (en) | 2023-04-12 | 2023-04-12 | Manufacturing method of hob bit suitable for trimming bottom rock face of large-diameter rock-socketed pile hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116378571A (en) |
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2023
- 2023-04-12 CN CN202310415721.8A patent/CN116378571A/en active Pending
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