CN218487281U - Drill body semi-finished body - Google Patents
Drill body semi-finished body Download PDFInfo
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- CN218487281U CN218487281U CN202222396809.3U CN202222396809U CN218487281U CN 218487281 U CN218487281 U CN 218487281U CN 202222396809 U CN202222396809 U CN 202222396809U CN 218487281 U CN218487281 U CN 218487281U
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Abstract
The disclosure relates to the technical field of drilling tools, in particular to a drill body semi-finished body. The drill body semi-finished body comprises: the first connecting part, the second connecting part and the middle part of the drill body; the middle part of the drill body is used for connecting the first connecting part and the second connecting part, the diameter of the first connecting part and the diameter of the second connecting part are both smaller than the diameter of the middle part of the drill body, and the joint of the middle part of the drill body and the first connecting part is in smooth transition through a reinforced slope surface structure; the end part of the first connecting part is provided with a first counter bore. Through this bores body semi-finished body structural design, can rationally distribute the deformation ratio, reduce the deflection of boring body semi-finished body, reduce the internal stress of boring body semi-finished body in the course of working, improve the life of mould, reduce the material waste of manufacturing the boring body semi-finished body.
Description
Technical Field
The disclosure relates to the technical field of drilling tools, in particular to a drill body semi-finished body.
Background
The traditional drill chuck drill body semi-finished body is machined by adopting a lathe cutting process, a drill body raw material with certain turning allowance is often required to be used, a large amount of waste materials and scraps can be generated during turning, time and labor are wasted, the time cost and the labor cost are high, and the raw material waste is serious. The drill body semi-finished body of the drill chuck often has the problems that the strength of raw materials of the drill body is not enough and the drill body deforms outside a set position when being processed and improved, so that the drill body structure with the set shape can be formed only by processing for many times, the efficiency of the whole drill body processing process is very low, and the rejection rate is obviously high.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the present disclosure provides a drill body.
The present disclosure provides a drill body semi-finished body comprising: the first connecting part, the second connecting part and the middle part of the drill body;
the first connecting part is arranged towards the clamping jaw;
the second connecting part is arranged towards the electric drill;
the middle part of the drill body is used for connecting the first connecting part and the second connecting part, the diameter of the first connecting part and the diameter of the second connecting part are both smaller than the diameter of the middle part of the drill body, and the joint of the middle part of the drill body and the first connecting part is in smooth transition through a reinforced slope surface structure;
the end part of the first connecting part is provided with a first counter bore.
Optionally, the joint between the middle part of the drill body and the second connecting part is in smooth transition through the reinforced slope surface structure.
Optionally, a second counter bore is formed at an end of the second connecting portion.
Optionally, the reinforced slope surface structure is a conical surface or an arc surface.
Optionally, an extrusion step is arranged on the reinforced slope surface structure.
Optionally, the ratio of the diameter D2 of the middle part of the drill body to the diameter D1 of the first connection part is D, i.e. D = D2/D1; the value of D is greater than or equal to 1.3 and less than or equal to 1.5.
Optionally, the extension length of the outer edge of the middle part of the drill body along the axis is L; the value of L is greater than or equal to 1.5mm and less than or equal to 5.7mm.
Optionally, the drill body semi-finished body is formed by cold heading.
Optionally, the drill body semi-finished body is made of low carbon steel.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
the utility model provides a bore body sets up through the junction at first connecting portion and bore body middle part and strengthens domatic structure and seted up first counter bore at the tip of first connecting portion, can the rational distribution deformation ratio, reduces the deflection of boring the body semi-finished body, reduces the internal stress of boring the body semi-finished body in the course of working, improves the life of mould, reduces the material waste of manufacturing the body semi-finished body.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the embodiments or technical solutions in the prior art description will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a drill body intermediate according to an embodiment of the present disclosure.
Fig. 2 is another schematic structural diagram of a drill body intermediate according to an embodiment of the present disclosure.
Wherein, 1, a first connecting part; 2. a second connecting portion; 3. the middle part of the drill body; 41. a first counterbore; 42. a second counterbore; 5. reinforcing the slope surface structure; 6. and (5) extruding the step.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
The traditional drill chuck drill body is machined by adopting a lathe cutting process, a drill body raw material with a certain turning allowance is often required to be used, a large amount of waste materials and scraps can be generated during turning, time and labor are wasted, the time cost and the labor cost are high, and the raw material waste is serious. The drill body of the drill chuck is often not enough in raw material strength when being processed and improved, and is deformed outside a set position, so that the drill body structure with the set shape can be formed only by processing for many times, the efficiency of the whole machining process of the drill body is very low, and the problem of obviously high rejection rate is also caused.
Based on this, this embodiment provides a bore body semi-finished body, through set up at the junction at first connecting portion and bore body middle part and strengthen domatic structure and seted up first counter bore at the tip of first connecting portion, can rationally distribute the deformation ratio, reduce the deflection of boring body semi-finished body, reduce the internal stress of boring body semi-finished body in the course of working, improve the life of mould, reduce the material waste of manufacturing the boring body semi-finished body. This is illustrated in detail by the following specific examples:
referring to fig. 1 and 2, the present embodiment provides a drill body intermediate including: a first connecting part 1, a second connecting part 2 and a drill body middle part 3; the first connecting part 1 is a drill body semi-finished body close to three clamping jaw closing parts of a drill chuck; the second connecting part 2 is a part of the drill body semi-finished body close to the part connected with the electric drill; the position where the diameter of the semi-finished drill body is the largest is arranged in the middle 3 of the drill body, a nut, a gasket and a bearing are arranged close to the middle 3 of the drill body, the middle 3 of the drill body is used for connecting a first connecting part 1 and a second connecting part 2, the diameter of the first connecting part 1 and the diameter of the second connecting part 2 are both smaller than the diameter of the middle 3 of the drill body, and the connecting part of the middle 3 of the drill body and the first connecting part 1 is in smooth transition through a reinforced slope structure 5; the end of the first connecting part 1 is provided with a first counter bore 41.
The connection part of the first connection part 1 and the drill body middle part 3 is provided with the reinforced slope surface structure 5 and the first counter bore 41, so that the deformation ratio can be reasonably distributed, the deformation of the drill body semi-finished body is reduced, the internal stress of the drill body semi-finished body in the machining process is reduced, the service life of a mold is prolonged, a pre-installation station for a drill bit is formed, and the material usage amount of the drill body semi-finished body is reduced.
In some embodiments, the junction of the drill body middle part 3 and the second connecting part 2 is smoothly transited through a reinforcing slope surface structure 5; set up like this and to make the tissue density that bores body middle part 3 bigger for the holding area of clamping jaw at clamping jaw hole rear portion is bigger, utilizes the enhancement domatic structure 5 of here to provide stronger axial support for parts such as screw or bearing in the body semi-manufactured body axis direction of boring, makes drill chuck centre gripping more stable, improves drill chuck product property ability, simultaneously, sets up through the junction at second connecting portion 2 and bore body middle part 3 and strengthens domatic structure 5 and can reduce the material cut volume. Furthermore, both sides through boring body middle part 3 all set up and strengthen domatic structure 5, can reduce the stress in the extrusion drilling body mould, improve mould life.
Continuing to refer to fig. 1, the end of the second connecting part 2 is provided with a second counter bore 42, rough machining of the connecting part of the drill body semi-finished body and the electric drill is achieved through the arrangement of the second counter bore 42, material machining amount is reduced, stress in an extrusion drill body die is reduced through the front and back design of the first counter bore 41 and the second counter bore 42, and the service life of the die is prolonged.
In some embodiments, the reinforcing ramp structure 5 is a conical or arcuate surface; the front side of the middle part 3 of the drill body is provided with a conical or arc-shaped surface, so that the conical structure of the middle part 3 of the drill body is matched with the conical surface of the nut, and the material waste during the fine machining of the semi-finished drill body in the later period is further reduced.
Continuing to refer to fig. 1, an extrusion step 6 is arranged on the reinforced slope structure 5 at the joint of the first connecting part 1 and the middle part 3 of the drill body; the extrusion step 6 is of a circular ring stepped structure and is used for placing a drill chuck steel pad or a bearing, and the material cutting amount can be reduced by arranging the extrusion step 6.
TABLE 1
With continued reference to fig. 1, 2 and table 1, the ratio of the diameter D2 of the middle portion 3 of the drill body to the diameter D1 of the first connection portion 1 is set to D, i.e. D = D2/D1; defining a D value greater than or equal to 1.3 and less than or equal to 1.5; when the value of D is reduced from 1.6 to 1.5, the rejection rate is obviously reduced, in order to enable the axis of the clamping jaw hole to fall inside the middle part 3 of the drill body, the value of D is more than or equal to 1.3, the value of D is required to fall in the interval of 1.3 to 1.5, the low rejection rate can be ensured, the axis of the clamping jaw can fall inside the position with the maximum diameter of the drill body semi-finished body at the position with the maximum diameter of the drill body semi-finished body, and the stability of the clamping jaw in reciprocating motion is improved; it should be understood that the value of D may take on 1.3, 1.4 or 1.5.
TABLE 2
With continued reference to fig. 1, 2 and table 2, the outer edge of the central portion 3 of the drill body extends along its axis for a length L; defining a value of L greater than or equal to 1.5mm and less than or equal to 5.7mm; when the value of L is increased from 1mm to 1.5mm, the rejection rate is obviously reduced, and no matter the value of D is 1.3, 1.4 or 1.5, the ratio of the crack products of the semi-finished drill body to the total waste products is obviously reduced, so that the actual production requirement can be completely met; in order to meet the actual use requirement of the semi-finished drill body, the value of L is more than or equal to 1.5mm and less than or equal to 5.7mm, the rejection rate can be ensured to meet the requirement, and the material consumption of the semi-finished drill body can be reduced.
With continued reference to fig. 1 and 2, the drill body blank is formed by cold heading; the first connecting part 1, the second connecting part 2 and the drill body middle part 3 can be understood as the drill body semi-finished body is a cold heading formed part through cold heading forming, so that only machining allowance required by finish machining is reserved on the outer surface of the drill body semi-finished body, the material usage amount of the drill body semi-finished body is greatly reduced, and it can be understood that when the first counter bore 41 and/or the second counter bore 42 are formed through cold heading forming, the whole first connecting part 1 and/or the whole second connecting part 2 can be outwards expanded, that is, the diameter of the drill body semi-finished body can be further reduced, the purpose of predicting the diameter is achieved by utilizing the expansion amount of the formed first counter bore 41 and/or the formed second counter bore 42, the material usage amount of the drill body semi-finished body can be further reduced, the cost is saved, meanwhile, a large amount of waste materials cannot be generated, and the forming process is simple and environment-friendly.
In some embodiments, the material of the drill body intermediate is a low carbon steel; the drill body semi-finished body using the low-carbon steel as the raw material can obviously reduce the cracking phenomenon and the material friction in deformation when the drill body semi-finished body is extruded, and meets the use requirement of the drill body.
The specific implementation manner and the implementation principle are the same as those of the above-described embodiment, and can bring about the same or similar technical effects, and are not described in detail herein, and reference may be made to the description of the above-described drill body embodiment.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A drill body semi-body, comprising: the drill body comprises a first connecting part (1), a second connecting part (2) and a drill body middle part (3);
the middle part (3) of the drill body is used for connecting the first connecting part (1) and the second connecting part (2), the diameter of the first connecting part (1) and the diameter of the second connecting part (2) are both smaller than the diameter of the middle part (3) of the drill body, and the connecting part of the middle part (3) of the drill body and the first connecting part (1) is in smooth transition through a reinforced slope surface structure (5);
the end part of the first connecting part (1) is provided with a first counter bore (41).
2. Drill body semi-finished body according to claim 1, characterised in that the connection of the drill body middle part (3) and the second connection part (2) is smoothly transited by the reinforcement ramp structure (5).
3. Drill body semi-finished body according to claim 1, characterised in that the end of the second connection part (2) is provided with a second counter bore (42).
4. Drill body semi-body according to claim 1, characterised in that the reinforcing ramp structure (5) is a conical or curved surface.
5. Drill body half-body according to claim 1, characterized in that the reinforcing ramp structure (5) is provided with an extrusion step (6).
6. Drill body semi-finished body according to any one of claims 1 to 5, characterised in that the ratio of the diameter D2 of the drill body middle part (3) to the diameter D1 of the first connection part (1) is D, i.e. D = D2/D1; the value of D is greater than or equal to 1.3 and less than or equal to 1.5.
7. Drill body semi-body according to claim 6, characterised in that the outer edge of the drill body middle (3) extends along its axis for a length L; the value of L is greater than or equal to 1.5mm and less than or equal to 5.7mm.
8. The drill body blank according to claim 7, wherein the drill body blank is formed by cold heading.
9. Drill body semi-body according to claim 8, characterized in that the material of the drill body semi-body is mild steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222396809.3U CN218487281U (en) | 2022-09-08 | 2022-09-08 | Drill body semi-finished body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222396809.3U CN218487281U (en) | 2022-09-08 | 2022-09-08 | Drill body semi-finished body |
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| Publication Number | Publication Date |
|---|---|
| CN218487281U true CN218487281U (en) | 2023-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222396809.3U Active CN218487281U (en) | 2022-09-08 | 2022-09-08 | Drill body semi-finished body |
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| CN (1) | CN218487281U (en) |
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- 2022-09-08 CN CN202222396809.3U patent/CN218487281U/en active Active
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