Center hole drilling mould for realizing coaxiality of two end faces of bar on vertical drilling machine

Abstract

The utility model relates to the technical field of machining auxiliary tools, in particular to a central hole drilling mould for realizing coaxiality of two end faces of a bar on a vertical driller, which comprises a base, a plurality of upright posts are fixed on the upper surface of the base, and mounting seats are mounted at the upper ends of the upright posts through height adjusting components; the whole machining procedure can be completed through one-time clamping of the three-jaw self-centering chuck, the clamping frequency is reduced, and therefore the defect that the position of a bar is slightly moved due to clamping is overcome, and due to the arrangement of the three-jaw self-centering chuck, the machining efficiency is improved. And meanwhile, due to the fact that the rotating base and the mounting base are connected and limited through the positioning rod, personnel can turn over the bar more conveniently and more conveniently, and time is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining auxiliary tools, in particular to a drilling center hole fixture for realizing the coaxiality of both ends of a bar on a vertical drilling machine. Background Art

[0002] When performing machining, various tools for fixing or clamping workpieces are often required. For example, when drilling a center hole in a bar, when the traditional tool for clamping the bar is turned over, that is, when drilling the other end of the bar, it is necessary to first loosen the fixture, then manually turn over the bar by the operator, and finally clamp the bar through the fixture. This makes the above fixture not convenient to use, but multiple clamping is also likely to cause a large deviation in the coaxiality of the two center holes after the bar is finally processed, thus affecting the machining accuracy of the bar. Therefore, in order to solve the above technical problems, we propose a drilling center hole fixture for realizing the coaxiality of both ends of a bar on a vertical drilling machine. Content of the Utility Model

[0003] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a drilling center hole fixture for realizing the coaxiality of both ends of a bar on a vertical drilling machine.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A drilling center hole fixture for realizing the coaxiality of both ends of a bar on a vertical drilling machine, comprising a base, on the upper surface of the base, a plurality of columns are fixed, the upper ends of the columns are installed with a mounting seat through a height adjustment component, the middle part of the side of the mounting seat away from the column is installed with a rotating seat through a rotating shaft, one side of the rotating seat is provided with a mounting opening and a three-jaw self-centering chuck is installed through the mounting opening, one side of the mounting seat is provided with a positioning hole and a positioning rod is inserted through the positioning hole, and through holes are provided on both sides of the rotating seat corresponding to the positioning hole and the positioning rod for cooperation.

[0006] Preferably, the height adjustment component includes a plurality of screws and a clamping plate, both ends of the clamping plate are connected with the mounting seat through screws, and a receiving groove for receiving the column is provided between the outer ring surface of the mounting seat and the clamping plate.

[0007] Preferably, a plurality of arc-shaped limiting grooves are provided on the side of the mounting seat away from the column, and clamping protrusions are provided on the outer wall of the rotating seat corresponding to the limiting grooves for cooperation.

[0008] Preferably, the positioning hole on the mounting seat is in an inclined state and its low end is the end away from the rotating seat, and a pressure relief port is provided at the low end of the positioning hole.

[0009] Preferably, both the outer ring surface of the positioning rod and the inner wall of the positioning hole are smooth surfaces, and the end of the positioning rod inserted into the positioning hole is spherical.

[0010] Preferably, annular magnetic attraction sheets are correspondingly arranged on both sides of the rotating seat through the holes, and annular adsorption sheets are correspondingly arranged on the end of the positioning rod for the annular magnetic attraction sheets.

[0011] Preferably, a debris receiving port is arranged on the upper surface of the base, the end of the column is fixed in the debris receiving port, and a sealing plate is arranged at one end of the debris receiving port.

[0012] A drilling center hole fixture for realizing coaxiality of both ends of a bar on a vertical drilling machine proposed by the utility model has the beneficial effects as follows:

[0013] 1: In the utility model, the middle part of the bar is clamped by a three-jaw self-centering chuck. When the bar needs to be turned over, the operator directly pulls out the positioning rod and turns over the rotating seat until the upper and lower sides of the rotating seat are reversed. At this time, the center hole of the remaining end of the bar can be processed by an external machine tool. And in this process, since the bar can complete the whole processing procedure through one-time clamping by the three-jaw self-centering chuck, the number of clamping times is reduced, thus avoiding the defect of slight movement of the bar position caused by clamping. And the setting of the three-jaw self-centering chuck further improves the convenience of clamping the bar and the coaxiality of the center hole after the bar is processed. At the same time, since the rotating seat and the mounting seat are connected and limited by the positioning rod, it is more convenient and time-saving for the operator to turn over the bar.

[0014] 2: In the utility model, the setting of the limiting groove and the clamping protrusion enables the mounting seat and the rotating seat to be not only rotationally limited by the rotating shaft, but also limited by the cooperation between the clamping protrusion and the limiting groove, that is, the rotating seat can only rotate under the limitation of the arc-shaped limiting groove and the rotating shaft, thus avoiding the phenomenon that the rotating seat shakes up and down during the bar processing, resulting in incorrect processing accuracy of the center hole of the bar; the downwardly inclined positioning hole makes the positioning rod more stable after being inserted into the positioning hole and not easily separated from the positioning hole automatically. And the setting of the pressure relief port enables the gas inside the positioning hole to be discharged or entered conveniently when the smooth surface of the positioning hole cooperates with the positioning rod, so as not to affect the insertion and extraction of the positioning rod. Since the end of the positioning rod is spherical, it is more convenient and smooth for the operator to insert the end of the positioning rod into the positioning hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of a drilling center hole fixture for realizing coaxiality of both ends of a bar on a vertical drilling machine proposed by the utility model;

[0016] Figure 2 is a bottom view of the rotating seat of a drilling center hole fixture for realizing coaxiality of both ends of a bar on a vertical drilling machine proposed by the utility model;

[0017] Figure 3 Schematic diagram of turning over the rotating seat of a drilling center hole fixture for making the two end faces of a bar coaxial on a vertical drilling machine proposed by the present utility model;

[0018] Figure 4 Schematic diagram of disassembling the rotating seat and the mounting seat of a drilling center hole fixture for making the two end faces of a bar coaxial on a vertical drilling machine proposed by the present utility model.

[0019] In the figure: 1, base; 2, column; 3, mounting seat; 4, rotating shaft; 5, rotating seat; 6, positioning hole; 7, positioning rod; 8, clamping plate; 9, limiting groove; 10, clamping projection; 11, annular magnetic sheet; 12, sealing plate. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0021] Embodiment 1

[0022] Referring to Figures 1-4 , a drilling center hole fixture for making the two end faces of a bar coaxial on a vertical drilling machine includes a base 1. A plurality of columns 2 are fixed on the upper surface of the base 1. The upper ends of the columns 2 are installed with a mounting seat 3 through a height adjusting component. The middle part of one side of the mounting seat 3 far away from the column 2 is installed with a rotating seat 5 through a rotating shaft 4. The contact surfaces of the mounting seat 3 and the rotating seat 5 are both arc-shaped and fit with each other; a mounting port is provided on one side of the rotating seat 5 and a three-jaw self-centering chuck is installed through the mounting port. A positioning hole 6 is provided on one side of the mounting seat 3 and a positioning rod 7 is inserted through the positioning hole 6. Corresponding to the positioning hole 6 and the positioning rod 7 on both sides of the rotating seat 5, through holes are provided for cooperation.

[0023] Embodiment 2

[0024] Referring to Figures 1-4 , in the case that other parts are the same as those in Embodiment 1, the difference between this embodiment and Embodiment 1 lies in:

[0025] The height adjustment assembly includes a number of screws and a clamping plate 8. Both ends of the clamping plate 8 are connected to the mounting base 3 by screws. There is a receiving groove for accommodating the column 2 between the outer ring surface of the mounting base 3 and the clamping plate 8. The setting of the height adjustment assembly enables personnel to adjust the height of the mounting base 3 up and down according to specific usage requirements. That is, by controlling the tightness between the clamping plate 8 and the mounting base 3 with screws, the mounting base 3 can move up and down along the column 2 or be fixed. On one side of the mounting base 3 away from the column 2, there are a number of arc-shaped limiting grooves 9. The outer wall of the rotating seat 5 is provided with mating clamping protrusions 10 corresponding to the limiting grooves 9. The setting of the limiting grooves 9 and the clamping protrusions 10 enables not only simple rotational limitation between the mounting base 3 and the rotating seat 5 through the rotating shaft 4, but also limitation through the cooperation between the clamping protrusions 10 and the limiting grooves. That is, under the limitation of the arc-shaped limiting grooves 9 and the rotating shaft 4, the rotating seat 5 can only rotate, thus avoiding the phenomenon that the rotating seat 5 shakes up and down during bar processing, resulting in incorrect machining accuracy of the center hole of the bar. The positioning hole 6 on the mounting base 3 is in an inclined state and its low end is the end away from the rotating seat 5. There is a pressure relief port at the low-end end of the positioning hole 6. The inclined downward positioning hole 6 makes the positioning rod 7 more stable after being inserted into the positioning hole 6 and not easily automatically separated from the positioning hole 6. The setting of the pressure relief port enables the gas inside the positioning hole 6 to be conveniently discharged or entered when the smooth surface of the positioning hole 6 cooperates with the positioning rod 7, so as not to affect the insertion and extraction of the positioning rod 7.

[0026] Both the outer ring surface of the positioning rod 7 and the inner wall of the positioning hole 6 are smooth surfaces. One end of the positioning rod 7 inserted into the positioning hole 6 is spherical. Due to the spherical end of the positioning rod 7, it is more convenient and smooth for personnel to insert the end of the positioning rod 7 into the positioning hole 6. Corresponding to the through holes on both sides of the rotating seat 5, there are mating annular magnetic attraction sheets 11. The end of the positioning rod 7 is provided with a mating annular adsorption sheet corresponding to the annular magnetic attraction sheets 11. The setting of the annular magnetic attraction sheets 11 has a certain fixing effect on the positioning rod 7. That is, during the processing of the bar by the external machine tool, the acting forces such as vibration generated during the processing are not easy to drive the positioning rod 7 to fall off from the positioning hole 6, thus ensuring the stability between the rotating seat 5 and the mounting base 3. There is a debris receiving port on the upper surface of the base 1. The end of the column 2 is fixed in the debris receiving port. One end of the debris receiving port is provided with a sealing plate 12. The setting of the debris receiving port facilitates the collection of debris generated during bar processing, thus facilitating subsequent cleaning.

[0027] Principle of use and advantages: During the use of the utility model, the base 1 is installed on the workbench of an external machine tool through an external electromagnetic chuck or bolts. Subsequently, when end machining of the bar stock is required, such as when drilling a center hole on the end face, the operator directly clamps the middle part of the bar stock through a three-jaw self-centering chuck. Then, the external machine tool can machine the center hole at the upper end of the bar stock. Further, when the bar stock needs to be turned over, the operator directly pulls out the positioning rod 7 and flips the rotating seat 5 until the upper and lower sides of the rotating seat 5 are reversed. At this time, the original lower end of the bar stock becomes the upper end, that is, the external machine tool can then machine the center hole at the remaining end of the bar stock. And during this process, since the bar stock can complete the entire machining process with a single clamping by the three-jaw self-centering chuck, the number of clamping operations is reduced, thereby avoiding the defect of slight movement of the bar stock position caused by clamping. Moreover, the setting of the three-jaw self-centering chuck further improves the convenience of clamping the bar stock and the coaxiality of the bar stock. At the same time, since the rotating seat 5 and the mounting seat 3 are connected and limited by the positioning rod 7, it is more convenient and time-saving for the operator to turn over the bar stock.

[0028] It should be further noted that the setting of the height adjustment component enables the operator to control the tightness between the clamping plate 8 and the mounting seat 3 through screws, so that the mounting seat 3 can move up and down along the column 2 or be fixed; the setting of the limiting groove 9 and the clamping protrusion 10 enables the mounting seat 3 and the rotating seat 5 to be not only rotationally limited by the rotating shaft 4 alone, but also limited by the cooperation between the clamping protrusion 10 and the limiting groove. That is, under the limitation of the arc-shaped limiting groove 9 and the rotating shaft 4, the rotating seat 5 can only rotate, thus avoiding the phenomenon that the rotating seat 5 shakes up and down during the machining of the bar stock, resulting in incorrect machining accuracy of the center hole of the bar stock; the downwardly inclined positioning hole 6 makes the positioning rod 7 more stable after being inserted into the positioning hole 6 and not easily automatically separated from the positioning hole 6. The setting of the pressure relief port enables the gas inside the positioning hole 6 to be conveniently discharged or entered when the smooth surface of the positioning hole 6 cooperates with the positioning rod 7, so as not to affect the insertion and extraction of the positioning rod 7. Since the end of the positioning rod 7 is spherical, it is more convenient and smooth for the operator to insert the end of the positioning rod 7 into the positioning hole 6; the setting of the annular magnetic sheet 11 has a certain fixing effect on the positioning rod 7, that is, during the machining of the bar stock by the external machine tool, the vibration and other acting forces generated during the machining process are not easy to drive the positioning rod 7 to fall off from the positioning hole 6, thus ensuring the stability between the rotating seat 5 and the mounting seat 3; the setting of the debris receiving port facilitates the collection of the debris generated during the machining of the bar stock, thus facilitating subsequent cleaning.

[0029] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A center hole drilling jig for achieving coaxial drilling of both end faces of a bar on a vertical drilling machine, comprising a base (1), characterized in that: A plurality of columns (2) are fixed on the upper surface of the base (1); a mounting seat (3) is mounted on the upper end of the column (2) via a height adjustment assembly; a rotating seat (5) is mounted on the middle of the mounting seat (3) away from the column (2) via a rotating shaft (4); a mounting opening is provided on one side of the rotating seat (5) and a three-jaw self-centering chuck is mounted through the mounting opening; a positioning hole (6) is provided on one side of the mounting seat (3) and a positioning rod (7) is inserted through the positioning hole (6); and matching through holes are provided on both sides of the rotating seat (5) corresponding to the positioning hole (6) and the positioning rod (7).

2. A center hole drilling jig for achieving coaxial drilling of both end faces of a bar on a vertical drilling machine according to claim 1, characterized in that: The height adjustment assembly comprises a plurality of screws and a clamping plate (8), the two ends of the clamping plate (8) are connected to the mounting seat (3) by means of screws, and a receiving groove for receiving the column (2) is provided between the outer ring surface of the mounting seat (3) and the clamping plate (8).

3. A center hole drilling jig for achieving coaxial drilling of both end faces of a bar on a vertical drilling machine according to claim 1, characterized in that: A plurality of arc-shaped limiting grooves (9) are provided on a side of the mounting seat (3) away from the column (2), and matching clamping protrusions (10) are provided on the outer wall of the rotating seat (5) corresponding to the limiting grooves (9).

4. A center hole drilling jig for achieving coaxial drilling of both end faces of a bar on a vertical drilling machine according to claim 1, characterized in that: The positioning hole (6) on the mounting seat (3) is in an inclined state and its lower end is an end away from the rotating seat (5), and a pressure relief port is provided at the lower end of the positioning hole (6).

5. The jig for drilling a center hole on a vertical drilling machine to achieve coaxiality between the two end faces of a bar according to claim 1, characterized in that: The outer ring surface of the positioning rod (7) and the inner wall of the positioning hole (6) are both smooth surfaces, and the end of the positioning rod (7) inserted into the positioning hole (6) is in the shape of a ball head.

6. A center hole drilling jig for achieving coaxial drilling of both end faces of a bar on a vertical drilling machine according to claim 1, characterized in that: The holes corresponding to the holes on both sides of the rotating seat (5) are provided with matching annular magnetic sheets (11), and the end of the positioning rod (7) is provided with matching annular adsorption sheets corresponding to the annular magnetic sheets (11).

7. The jig for drilling a center hole on a vertical drilling machine to achieve coaxiality between the two end faces of a bar according to claim 1, characterized in that: The upper surface of the base (1) is provided with a debris receiving opening, the end of the column (2) is fixed in the debris receiving opening, and a sealing plate (12) is provided at one end of the debris receiving opening.

Images