CN202324044U - Hydraulic breaking hammer drill rod structure - Google Patents
Hydraulic breaking hammer drill rod structure Download PDFInfo
- Publication number
- CN202324044U CN202324044U CN201120526728XU CN201120526728U CN202324044U CN 202324044 U CN202324044 U CN 202324044U CN 201120526728X U CN201120526728X U CN 201120526728XU CN 201120526728 U CN201120526728 U CN 201120526728U CN 202324044 U CN202324044 U CN 202324044U
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- drill
- bit
- drill bit
- drill steel
- thread
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Abstract
The utility model discloses a hydraulic breaking hammer drill rod structure and an inlaying method of an alloy drill bit thereof. A thread center hole is arranged at a head working end of a drill rod body of the structure disclosed by the utility model, a sunk flat section is arranged at the middle end of the drill rod body, and the tail end surface of the drill rod body is a drill tail impact surface; and the drill bit is made from an alloy material, the head part of the drill bit is a drill bit working blade, the middle part of the drill bit is a thread screw rod, and the tail end surface of the drill bit is a drill bit impact surface. According to the utility model, the drill rod body is fixed by the flat section of the drill rod body, and the plane of the alloy drill bit working blade is used as a rotation stress surface; by applying a tightening torque, the thread screw rod of the alloy drill bit is screwed into the thread center hole of the drill rod body; the thread center hole and the thread screw rod form a thread pair; and the drill bit is inlaid into the drill rod body so that a proper pre-tightening force is generated between the drill rod body and the alloy drill bit. The hydraulic breaking hammer drill rod structure disclosed by the utility model has the characteristics of simple structure, high efficiency and durability, and is convenient to process and mount.
Description
Technical field
The utility model belongs to technical field of engineering machinery, is specifically related to the method for embedding of a kind of hydraulic crushing hammar drill rod structure and alloy drill bit thereof.
Background technology
[0002] hydraulic crushing hammar drill rod is in order to hard objects such as fractured rock, concrete; The strike end that requires drill steel to bear piston has good toughness; Indeformable when bearing the impact of piston, do not burst apart; The drill steel body does not rupture, and bore bit (drill steel working end) has high strength, tough and tensile and wear-resisting requirement.Therefore, the bore bit of drill steel, bit shank and mid portion require different to hardness, intensity, abrasion resistance and anti-bending strength.Present homemade drill steel mainly is two big types; The one, overall structure drill steel a large amount of uses at present, that adopt same ordinary carbon steel or structural alloy steel (like No. 45 steel); Its performance mainly guarantees by heat treatment; Because segmentation adopts the different heat treatment difficult technique to realize, can not guarantee the toughness of bit shank and hardness, the abrasion resistance of bore bit simultaneously, so generally have only 7～10 days the application life of operate as normal.Another kind of is the alloy drill steel of fabricated structure, and the drill steel body adopts common iron, and bore bit adopts and is embedded in the hard alloy drill on the drill steel body; Because carbide alloy has hardness height, characteristics that abrasion resistance is good; Like this, both guarantee intensity and toughness when bit shank partly bears piston slap power, satisfied the requirement of bore bit part high rigidity, high strength, high-wearing feature again; Therefore, can improve 3～6 times its application life.
In the mosaic procedure of alloy drill bit, method commonly used at present is method for brazing and temperature difference plunging, and wherein method for brazing is that alloy drill bit is inserted in the centre bore of drill steel body working end, adopts soldering to be fixed; Temperature difference plunging is with drill steel body heating, makes its centre bore expanded by heating, and the sub-cooled alloy drill bit is pressed in the centre bore of this volume expansion of drill steel then simultaneously, the cooling back both because interference fit and relative fixed.Because hydraulic breaking hammer realizes that through piston high frequency bump bit shank the bore bit high frequency clashes into broken thing; And impact is huge; Therefore, the weld seam position of adopting soldering processes to inlay alloy drill bit is damaged when transmitting the big impact of high frequency easily, and bore bit occurs loosening even drops out; To inlay the method for alloy drill bit be to fix by the magnitude of interference and adopt the temperature difference to be pressed into technology, and when transmitting the big impact of high frequency, two fitting faces transmit the pulse heavy duty by the frictional force of interference generation, very easily fatigue failure occurs and become flexible.
After drill steel body and the loosening phenomenon of bore bit generation; During hydraulic breaking hammer piston slap bit shank; Because between drill steel body and the bore bit loosening gap is arranged, impact can not directly be delivered to broken thing through bore bit, the drill steel body just can strike bore bit after need passing through the idle stroke of becoming flexible the gap; Produce the secondary impact phenomenon; Consume the part impact, the elastic-plastic deformation of drill steel body and bore bit connecting portion absorbs ballistic work during simultaneously owing to secondary impact, makes the effective rate of utilization of its impact energy reduce by 8 ~ 25%.
Summary of the invention
The purpose of the utility model is to the above-mentioned defective that exists in the prior art, provides a kind of simple in structure, highly efficient durable, drill steel body and bore bit connecting portion to remain certain prestressed hydraulic crushing hammar drill rod structure.
The purpose of the utility model is to realize through following technical scheme: this hydraulic crushing hammar drill rod structure comprises drill steel body and bore bit; The head working end of drill steel body is processed with a threaded central aperture, and the top and bottom of its middle-end are processed with the flat part of a depression respectively, and its breech face is the bit shank striking face; Bore bit adopts Hardmetal materials to process, and its conical nose is processed with the bore bit work edge of planar shaped, and the center is a thread screw, and its breech face is the bore bit striking face; The threaded central aperture of said drill steel body and the thread screw of bore bit are formed screw thread pair, and bore bit is embedded in the drill steel body, and drill steel body threaded central aperture bottom surface closely contacts with the bore bit striking face.
More particularly, the threaded central aperture of said drill steel body is the trapezoidal thread hole, and the thread screw of bore bit is a trapezoid thread screw.The trapezoidal thread that drill steel threaded central aperture and alloy drill bit thread screw are formed is secondary, when its thread helix lift angle can guarantee to transmit the big impact of high frequency, and the reliably self-locking of screw thread pair ability.
In the utility model; The impact that piston imposes on drill steel bit shank striking face can directly be delivered to broken thing through bore bit; Reduce or eliminate the loss in the impact energy transmission; And the self-lock ability of its screw thread pair can reliably prevent alloy drill bit becoming flexible when transmitting the big impact of high frequency, thereby keeps the bottom surface of drill steel threaded central aperture and the compressive pre-stress of alloy drill bit striking face contact position.Therefore, the utlity model has simple in structure, convenient processing and installation, durable and efficient characteristics.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the partial structurtes enlarged drawing of mosaic site among Fig. 1.
Fig. 3 is an alloy drill bit structural representation among Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.
Referring to Fig. 1, present embodiment comprises drill steel body 1 and bore bit 2.The head working end of drill steel body 1 is processed with threaded central aperture 13, and threaded central aperture 13 is the trapezoidal thread hole, and the middle-end top and bottom of drill steel body 1 are the flat parts 12 of depression, and the breech face of drill steel body 1 is a bit shank striking face 11.Referring to Fig. 3, bore bit 2 adopts Hardmetal materials to process, and its head is processed with the bore bit work edge 23 of planar shaped, and the center is a thread screw 22, and thread screw 22 is a trapezoid thread screw, and bore bit 2 breech faces are bore bit striking face 21.Visible by Fig. 1; The threaded central aperture 13 of drill steel body 1 is formed screw thread pair with the thread screw of bore bit 2 22; Bore bit 2 is embedded in the drill steel body 1, and referring to Fig. 2, the threaded central aperture bottom surface 14 of drill steel body 1 closely contacts with the bore bit striking face 21 of bore bit 2 breech faces.Bit shank striking face 11 is accepted the bump of quartering hammer piston; Drill steel flat part 12 closes with the flat keying of quartering hammer drill steel 1 is installed and fixed; Bore bit striking face 21 bears the impact of bottom surface 14 transmission of drill steel threaded central aperture 13, and bore bit work edge 23 directly acts on broken thing.When the screw thread pair that threaded central aperture 13 and thread screw 22 are formed, its thread helix lift angle can guarantee to transmit the big impact of high frequency, the reliably self-locking of screw thread pair ability.
The alloy drill bit 2 of present embodiment is to be embedded on the drill steel body 1 through the trapezoidal thread pair that threaded central aperture 13 and alloy drill bit thread screw 22 are formed.Method for embedding is; Utilize drill steel flat part 12 that drill steel body 1 is fixing, the plane that utilizes bore bit work edge 23 applies screw-down torque as the rotation stress surface; Alloy drill bit thread screw 22 is screwed in drill steel threaded central aperture 13; And produce suitable pretightning force, make hole wall and the trapezoidal thread generation elastic deformation of drill steel threaded central aperture 13 and produce tensile stress, thereby produce compressive pre-stress with alloy drill bit striking face 21 contact positions in the bottom surface 14 of drill steel threaded central aperture 13; When its compressive pre-stress satisfy to transmit the big impact of high frequency, the contact site reduced or eliminated elastic-plastic deformation.Like this; The impact that piston imposes on drill steel bit shank striking face 11 just can directly be delivered to broken thing through alloy drill bit 2; Reduce or eliminate the loss in the impact energy transmission; And the self-lock ability of its screw thread pair can reliably prevent alloy drill bit 2 becoming flexible when transmitting the big impact of high frequency, thereby keeps the compressive pre-stress of bottom surface 14 with alloy drill bit striking face 21 contact positions of drill steel threaded central aperture 13.
Claims (2)
1. hydraulic crushing hammar drill rod structure, it is characterized in that: it comprises drill steel body and bore bit; The head working end of drill steel body is processed with a threaded central aperture, and the top and bottom of its middle-end are processed with the flat part of a depression respectively, and its breech face is the bit shank striking face; Bore bit adopts Hardmetal materials to process, and its conical nose is processed with the bore bit work edge of planar shaped, and the center is a thread screw, and its breech face is the bore bit striking face; The threaded central aperture of said drill steel body and the thread screw of bore bit are formed screw thread pair, and bore bit is embedded in the drill steel body, and drill steel body threaded central aperture bottom surface closely contacts with the bore bit striking face.
2. hydraulic crushing hammar drill rod structure according to claim 1 is characterized in that: the threaded central aperture of said drill steel body is the trapezoidal thread hole, and the thread screw of bore bit is a trapezoid thread screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120526728XU CN202324044U (en) | 2011-12-15 | 2011-12-15 | Hydraulic breaking hammer drill rod structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120526728XU CN202324044U (en) | 2011-12-15 | 2011-12-15 | Hydraulic breaking hammer drill rod structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202324044U true CN202324044U (en) | 2012-07-11 |
Family
ID=46436027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120526728XU Withdrawn - After Issue CN202324044U (en) | 2011-12-15 | 2011-12-15 | Hydraulic breaking hammer drill rod structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202324044U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493515A (en) * | 2011-12-15 | 2012-06-13 | 湖南科技大学 | Structure of hydraulic breaker drill rod, and method for embedding alloy drill bit of hydraulic breaker drill rod |
| CN105756114A (en) * | 2016-04-28 | 2016-07-13 | 宝得粉末注射成形（常熟）有限公司 | Steel chisel for hydraulic breaker |
-
2011
- 2011-12-15 CN CN201120526728XU patent/CN202324044U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493515A (en) * | 2011-12-15 | 2012-06-13 | 湖南科技大学 | Structure of hydraulic breaker drill rod, and method for embedding alloy drill bit of hydraulic breaker drill rod |
| CN102493515B (en) * | 2011-12-15 | 2014-09-03 | 湖南科技大学 | Structure of hydraulic breaker drill rod, and method for embedding alloy drill bit of hydraulic breaker drill rod |
| CN105756114A (en) * | 2016-04-28 | 2016-07-13 | 宝得粉末注射成形（常熟）有限公司 | Steel chisel for hydraulic breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120711 Effective date of abandoning: 20140903 |
|
| RGAV | Abandon patent right to avoid regrant |