Drill bit

Abstract

The utility model provides a drill bit and belongs to the technical field of drill bits. The drill bit comprises a cutter body and a lantern ring; the cutter body is provided with a cutter handle and a cutter head which are coaxially connected; a connecting part connected with a drill gun is arranged at one end, far away from the cutter head, of the cutter handle; the lantern ring is arranged on the cutter handle in a sleeving mode and connected with the cutter handle to define a first step, and the drill gun is limited through the first step. According to the drill bit, the cutter head and the cutter handle are integrally formed and machined to form the cutter body, the overall strength of the cutter body can be guaranteed, the precision of the cutter body can be guaranteed, the lantern ring is fixedly connected with the cutter body, the overall precision of a cutter can be improved, the overall strength of the drill bit can be guaranteed, and the service life of the drill bit is prolonged. The production process steps of the drill bit are simplified, the production efficiency of the drill bit is improved, and the production cost of the drill bit can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a drill bit. Background Art

[0002] The existing drill bits have complex welding solutions and long processing cycles. The high welding temperature affects the tool performance. The welded tools cannot be CVD coated due to the presence of flux. In addition, automatic feed drills generally require internal cooling tools. This type of tool has a special structure and a large diameter change, which makes it difficult to select the material for the internal cooling hole. The overall strength and precision of the tool using an integral heat shrink shank are poor. Utility Model Content

[0003] In view of this, the purpose of the utility model is to overcome the deficiencies in the prior art and provide a drill bit.

[0004] The utility model provides the following technical solution: a drill bit, comprising:

[0005] The cutter body comprises a coaxially connected cutter handle and a cutter head, wherein one end of the cutter handle away from the cutter head is provided with a connecting portion for connecting with a drill gun;

[0006] The collar is sleeved on the knife handle and connected with the knife handle to define a first step, so as to limit the drilling gun through the first step.

[0007] In some embodiments, a second step is defined between the tool handle and the tool head;

[0008] Along the axial direction of the blade body, one side of the collar abuts against the second step so that the collar is limited by the second step.

[0009] In some embodiments, the connection method between the collar and the blade body includes at least one of welding, bonding, heat shrink connection and riveting.

[0010] In some embodiments, the connecting portion includes at least one of a threaded column, a snap-in groove, and a threaded hole.

[0011] In some embodiments, a plurality of limiting portions are provided on the outer circumference of the collar, and the plurality of limiting portions are arranged at equal intervals.

[0012] In some embodiments, there are two limiting portions, and the two limiting portions are arranged on two opposite sides of the ring.

[0013] In some embodiments, the limiting portion includes at least one of a limiting step, a limiting hole, a limiting protrusion and a limiting slot.

[0014] In some embodiments, the axis of the collar coincides with the axis of the blade body.

[0015] In some embodiments, a first annular groove is provided at one end of the knife handle facing the knife head, so that the knife handle and the knife head are separated by the first annular groove;

[0016] And / or a second annular groove is provided between the knife handle and the connecting portion, so that the knife handle and the connecting portion are separated by the second annular groove.

[0017] In some embodiments, a plurality of spaced spiral grooves are provided on the circumference of the cutter head, and the edges of the spiral grooves are connected to the outer wall of the cutter head to form a cutting edge.

[0018] The embodiments of the utility model have the following advantages: the drill bit provided by the utility model forms a cutter body by integrally connecting the cutter head and the cutter handle, which not only ensures the overall strength of the cutter body, but also improves the precision of the cutter body; and the sleeve is fixedly connected to the cutter body, which not only improves the overall precision of the tool, but also ensures the overall strength of the drill bit, simplifies the production process steps of the drill bit, not only improves the production efficiency of the drill bit, but also effectively reduces the production cost of the drill bit.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A structural schematic diagram showing a first embodiment of a drill bit provided by some embodiments of the present utility model from one viewing angle;

[0022] Figure 2 A structural schematic diagram showing another perspective of a first implementation manner of a drill bit provided by some embodiments of the utility model;

[0023] Figure 3 A schematic structural diagram of a cutter body in a drill bit provided by some embodiments of the utility model from one perspective is shown;

[0024] Figure 4 A structural schematic diagram of a drill bit collar provided by some embodiments of the utility model from one perspective is shown;

[0025] Figure 5 A schematic structural diagram of a collar in a drill bit provided by some embodiments of the utility model from another perspective is shown;

[0026] Figure 6 Shows Figure 5 Cross-sectional view of the middle AA section;

[0027] Figure 7 A structural schematic diagram from one perspective of a second implementation manner of a drill bit provided in some embodiments of the utility model is shown.

[0028] Description of main component symbols:

[0029] 100-blade body; 110-blade handle; 111-connecting part; 120-blade head; 121-spiral groove; 122-blade band; 200-second step; 300-ring; 310-limiting part; 400-first annular groove; 500-second annular groove; 600-first step. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the template herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0035] like Figures 1 to 3 As shown, some embodiments of the utility model provide a drill bit, which is mainly used for drilling holes in workpieces, improves the overall strength and drilling accuracy of the drill bit during the working process, simplifies the production process steps of the drill bit, reduces the production cost of the drill bit, and improves the stability and drilling quality of the drill bit during use.

[0036] The drill bit includes a cutter body 100 and a collar 300 .

[0037] The cutter body 100 comprises a cutter handle 110 and a cutter head 120 which are coaxially connected. An end of the cutter handle 110 away from the cutter head 120 is provided with a connecting portion 111 for connecting with a drill gun.

[0038] It should be noted that the connection between the handle 110 and the blade head 120 includes any one of welding, bonding, integral molding, and hot pressing.

[0039] Preferably, in this embodiment, the tool handle 110 and the tool head 120 are integrally formed to form the tool body 100, which can not only ensure the overall strength of the tool body 100, but also reduce the connection processing technology between the tool handle 110 and the tool head 120, simplify the production process steps of the tool body 100, and effectively improve the production efficiency of the tool body 100.

[0040] In addition, it is also possible to avoid the outer diameter of the ring 300 affecting the material selection of the cutter body 100, thereby achieving separate material selection for the ring 300 and the cutter body 100, which not only reduces the material selection cost, but also reduces the waste of cutting materials during the processing of the cutter body 100, thereby reducing production costs.

[0041] It should be noted that, by providing the connection portion 111 on the handle 110 , the cutter body 100 can be connected to the drill gun via the connection portion 111 .

[0042] In addition, the collar 300 is sleeved on the knife handle 110 , and the collar 300 is connected to the knife body 100 .

[0043] It should be noted that the connection method between the collar 300 and the blade body 100 includes at least one of welding, bonding, heat shrink connection and riveting.

[0044] It is understandable that the inner wall of the collar 300 fits against the outer wall of the handle 110 to enhance the tightness of the connection between the collar 300 and the handle 110 .

[0045] Specifically, in this embodiment, the collar 300 is connected to the shank 110 to define a first step 600, so that the drill gun is limited by the first step 600, so that during the process of connecting the drill bit and the drill gun, the first step 600 can provide a limiting effect on the drill gun, thereby avoiding position deviation between the connecting part 111 of the drill gun and the drill bit, and ensuring the accuracy of the connection between the drill gun and the drill bit.

[0046] It should be noted that, in this embodiment, the specific installation position of the collar 300 on the blade body 100 can be determined by measurement according to actual needs.

[0047] like Figure 3 As shown, in some embodiments of the utility model, a second step 200 is defined between the tool handle 110 and the tool head 120, and along the axial direction of the tool body 100, one side of the collar 300 abuts against the second step 200, so as to limit the collar 300 through the second step 200 to ensure the production quality of the drill bit.

[0048] Exemplarily, if the outer diameter of the tool handle 110 is smaller than the outer diameter of the tool head 120, at this time, the side of the ring 300 facing the tool head 120 abuts against the second step 200, so as to limit the ring 300 through the second step 200, thereby ensuring the accuracy of the installation position of the ring 300 on the tool handle 110.

[0049] Exemplarily, if the outer diameter of the tool handle 110 is larger than the outer diameter of the tool head 120, at this time, the side of the ring 300 facing the tool handle 110 abuts against the second step 200, so as to limit the ring 300 through the second step 200, thereby ensuring the accuracy of the installation position of the ring 300 on the tool head 120.

[0050] Optionally, the collar 300 is connected to the second step 200 to further enhance the stability of the connection between the collar 300 and the blade body 100 .

[0051] In addition, in some embodiments of the present invention, the collar 300 is connected to the blade body 100 by heat shrinking to ensure the structural integrity of the blade body 100 while improving the stability of the connection between the collar 300 and the blade body 100.

[0052] It is worth noting that, in this embodiment, the axis of the collar 300 coincides with the axis of the cutter body 100 to ensure the production quality of the drill bit.

[0053] It can be understood that the drill bit provided by the present invention forms a cutter body 100 by integrally molding the cutter head 120 and the cutter handle 110, which not only ensures the overall strength of the cutter body 100, but also improves the precision of the cutter body 100, and the collar 300 is connected to the cutter body 100 by heat shrinking, which not only improves the stability of the connection between the collar 300 and the cutter body 100, but also ensures the overall strength of the drill bit, simplifies the production process steps of the drill bit, not only improves the production efficiency of the drill bit, but also effectively reduces the production cost of the drill bit.

[0054] It should be noted that by integrally forming the knife handle 110 and the knife head 120, not only the overall strength of the knife body 100 can be improved, but also the selection of materials for the knife handle 110 and the knife head 120 separately is avoided, thereby avoiding the adaptation problem of different materials of the knife head 120 and the knife handle 110.

[0055] That is to say, the drill bit provided by the present invention can select corresponding materials according to the drilling strength and requirements of the cutter head 120, so as to avoid being limited by the maximum diameter of the drill bit.

[0056] In addition, in this embodiment, the material of the collar 300 is steel, which can not only reduce the processing cost but also ensure the strength of the drill bit.

[0057] Among them, heat shrink refers to heat shrink interference connection, first heat the ring to expand, then assemble, and shrink the size after cooling, and use the interference fit between parts to achieve connection. This connection has a simple structure and good centering accuracy. It can withstand torque, axial force or a combination of the two loads, and has a high load-bearing capacity. It can also work reliably under impact and vibration loads.

[0058] Specifically, by heating the collar 300, after the collar 300 reaches a preset temperature, the inner diameter of the collar 300 increases. When the inner diameter of the collar 300 is larger than the outer diameter of the cutter head 120 or the cutter handle 110, the heated collar 300 is sleeved on the cutter head 120 or the cutter handle 110, and after the collar 300 is cooled, the heat shrink assembly between the collar 300 and the cutter body 100 is completed. This not only satisfies the positioning and installation of the collar 300 and the cutter body 100, but also does not affect the accuracy of the cutter body 100 during the heat shrink assembly process, thereby ensuring the processing accuracy of the drill bit.

[0059] It can be understood that the drill bit provided by the present invention not only has a simple manufacturing process and reduces the material cost and processing and manufacturing cost in the drill bit production process, but also can effectively improve the strength and precision of the drill bit.

[0060] like Figures 4 to 6 As shown, in some embodiments of the present invention, a limiting portion 310 is provided on the outer periphery of the collar 300 .

[0061] Specifically, by providing a limiting portion 310 on the outer periphery of the collar 300 , the output end of the installation or removal tool can be matched with the limiting portion 310 to form a limiting connection structure, so as to facilitate the installation or removal of the drill bit.

[0062] It should be noted that the limiting portion 310 includes at least one of a limiting step, a limiting hole, a limiting protrusion and a limiting slot.

[0063] Preferably, in this embodiment, the limiting portion 310 is a limiting step.

[0064] In this embodiment, a plurality of limiting portions 310 are disposed on the outer circumference of the collar 300 , and the plurality of limiting portions 310 are arranged at equal intervals.

[0065] It is understandable that the number of the limiting parts 310 can be two or more than two arbitrary numerical values, which can be specifically set according to actual conditions.

[0066] like Figure 5 and Figure 6 As shown, in some embodiments of the present invention, there are two limiting portions 310 , which are respectively disposed on two opposite sides of the collar 300 , and the two limiting portions 310 are centrally symmetrical about the axis of the collar 300 .

[0067] By providing two limiting portions 310 , the tool to be installed or removed can be clamped on the two limiting portions 310 , so as to improve the stability of clamping the drill bit.

[0068] like Figure 3As shown, in some embodiments of the present invention, a first annular groove 400 is provided at one end of the tool handle 110 facing the tool head 120, so that the tool handle 110 and the tool head 120 are separated by the first annular groove 400, and / or a second annular groove 500 is provided between the tool handle 110 and the connecting portion 111, so that the tool handle 110 and the connecting portion 111 are separated by the second annular groove 500.

[0069] It should be noted that the first annular groove 400 and the second annular groove 500 are both tool withdrawal grooves, so that during the processing of the tool handle 110 or the tool head 120, the first annular groove 400 and the second annular groove 500 can play a tool withdrawal role to ensure the processing accuracy and efficiency of the tool body 100.

[0070] In some embodiments of the present invention, the connecting portion 111 includes at least one of a threaded column, a clamping groove, and a threaded hole.

[0071] Preferably, in this embodiment, the connection portion 111 is a threaded column, so that the drill gun can be threadedly connected to the connection portion 111, thereby threading the drill bit to the drill gun to improve the installation or disassembly efficiency between the drill bit and the drill gun.

[0072] like Figure 1 and Figure 7 As shown, in some embodiments of the utility model, a plurality of spaced spiral grooves 121 are provided on the circumference of the cutter head 120, and the edges of the spiral grooves 121 are connected to the side walls of the cutter head 120 to form a cutting band 122, so that the cutting band 122 can be used to retract and limit the waste chips generated by the drill bit during the cutting process.

[0073] It should be noted that the spiral groove 121 has a concave surface, so that a blade band 122 with an inwardly concave tailing structure is formed by connecting the concave surface with the side wall of the cutter head 120. In this way, the blade band 122 can promote the chips to curl inward and converge, so as to limit and guide the waste chips. At the same time, it can also prevent the blade band 122 from scratching the hole wall of the workpiece, thereby further improving the processing quality of the workpiece.

[0074] Furthermore, in some embodiments of the present invention, a concave surface is provided on the inner wall of the spiral groove 121 to further increase the accommodation space of the spiral groove 121, thereby improving the chip removal capacity of the spiral groove 121, improving the fluency of the drill bit in the process of processing the workpiece, and avoiding the situation where waste chips clog the drill bit.

[0075] In some embodiments, the concave surfaces are in two groups, and the two groups of concave surfaces are respectively arranged on two opposite sides of the spiral groove 121. It can be understood that by arranging the concave surfaces in two groups, the accommodation space of the spiral groove 121 is further increased, thereby improving the ability of the spiral groove 121 to accommodate waste chips.

[0076] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0077] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0078] The above-mentioned embodiments only express several implementation methods of the present invention. The descriptions thereof are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention.

[0079] It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A drill bit, characterized in that: include: The cutter body comprises a coaxially connected cutter handle and a cutter head, wherein one end of the cutter handle away from the cutter head is provided with a connecting portion for connecting with a drill gun; The collar is sleeved on the knife handle and connected with the knife handle to define a first step, so as to limit the drilling gun through the first step.

2. The drill bit according to claim 1, characterized in that A second step is defined between the knife handle and the knife head; Along the axial direction of the blade body, one side of the collar abuts against the second step, so that the collar is limited by the second step.

3. The drill bit according to claim 1, characterized in that The connection method between the sleeve ring and the blade body includes at least one of welding, bonding, heat shrink connection and riveting.

4. The drill bit according to claim 1, characterized in that The connecting portion includes at least one of a threaded column, a clamping groove and a threaded hole.

5. The drill bit according to any one of claims 1 to 4, characterized in that A plurality of limiting portions are arranged on the outer circumference of the collar, and the plurality of limiting portions are arranged at equal intervals.

6. The drill bit according to claim 5, characterized in that There are two limiting portions, and the two limiting portions are arranged on two opposite sides of the collar.

7. The drill bit according to claim 5, characterized in that The limiting portion includes at least one of a limiting step, a limiting hole, a limiting protrusion and a limiting slot.

8. The drill bit according to claim 5, characterized in that The axis of the collar coincides with the axis of the blade body.

9. The drill bit according to claim 1, characterized in that A first annular groove is provided at one end of the knife handle facing the knife head, so that the knife handle and the knife head are separated by the first annular groove; And / or a second annular groove is provided between the knife handle and the connecting portion, so that the knife handle and the connecting portion are separated by the second annular groove.

10. The drill bit according to claim 1, characterized in that A plurality of spaced spiral grooves are arranged on the circumference of the cutter head, and the edges of the spiral grooves are connected to the outer wall of the cutter head to form a cutting edge.

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