CN217044724U

CN217044724U - Cambered surface drilling frock

Info

Publication number: CN217044724U
Application number: CN202220503373.0U
Authority: CN
Inventors: 卢亚威; 王建雨; 黄勇; 吕婷婷; 焦俊龙
Original assignee: Weihai Zhonghe Electromechanical Technology Co ltd
Current assignee: Weihai Zhonghe Electromechanical Technology Co ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-07-26
Anticipated expiration: 2032-03-10

Abstract

The utility model relates to a machinery processing technology field specifically is a cambered surface drilling frock, including pedestal, dabber, the locating pin passes on the dabber pinhole that the pedestal pinhole inserted the dabber rigid coupling on the pedestal, and the work piece of drilling is treated with the fixed interior cambered surface butt of treating the work piece of drilling to the dabber, and the drill bit passes locating hole one on the pedestal and locating hole two can realize once running through drilling. Compare with current unilateral through drilling's technical scheme, utilize the utility model discloses back drilling precision is higher, and the difficult deviation of hole size is difficult for causing frequently disconnected drill bit phenomenon, practices thrift the cutter cost. Compare with the technical scheme of twice drilling of present lower floor, utilize the utility model discloses back efficiency is higher, and the precision is higher.

Description

Cambered surface drilling frock

Technical Field

The utility model relates to the technical field of machining, specifically a cambered surface drilling frock.

Background

The workpiece 100 to be drilled as shown in fig. 1 has an intrados surface 101, and a first hole 103 and a second hole 102 as shown in fig. 2 need to be drilled in the workpiece 100, and the first hole 103 and the second hole 102 penetrate through the upper end surface and the lower end surface of the workpiece 100, but only a small part is cut on the intrados surface 101.

Under the condition of no tool guide, if the lower end face is drilled from the upper end face, after the drill bit enters the inner arc face 101, the problems of hole deviation, drill bit fracture and the like are easily caused under the action of the radial force on the tip of the drill bit, wherein the radial force is only applied to one side of the drill bit. If the upper end face and the lower end face are adopted for drilling respectively, the positioning is easy to be inaccurate, the hole size deviation of the upper end face and the lower end face is not concentric, and the efficiency is slow.

SUMMERY OF THE UTILITY MODEL

For overcoming one of prior art's defect or defect, the utility model discloses a cambered surface drilling frock, the technical scheme who takes is:

an arc surface drilling tool comprises

The seat body is integrally C-shaped and comprises an upper plate, a lower plate and a stand column fixedly connected with the upper plate and the lower plate, a mandrel hole with the axial direction being in the left-right direction is formed in the stand column, seat body pin holes, positioning holes I and positioning holes II with the axial direction being in the up-down direction are formed in the upper plate and the lower plate, and the pin holes are communicated with the mandrel hole; when the inner arc surface of the workpiece is concentric with the mandrel hole and the left end surface of the workpiece is abutted against the inner side surface of the upright post, a hole I and a hole II to be drilled on the workpiece are concentric with the positioning hole I and the positioning hole II;

the mandrel comprises a large arc surface and a small arc surface, the large arc surface can be in clearance fit or transition fit with an inner arc surface of a workpiece and a mandrel hole of the base body respectively, a mandrel pin hole is formed along the radial direction, a first guide semicircular hole and a second guide semicircular hole which are axially parallel to the mandrel pin hole are formed in the small arc surface, and when the mandrel pin hole and the base body pin hole are concentric and the left end surface of the workpiece is abutted against the inner side surface of the upright post, the first hole and the second hole to be drilled in the workpiece are concentric with the first guide semicircular hole and the second guide semicircular hole;

and the positioning pin penetrates through the pin hole of the base body and is inserted into the pin hole of the mandrel.

Furthermore, more than 1 limiting hole is formed in the upper plate and the lower plate, the axial direction of the limiting holes is the vertical direction, and after the limiting holes are inserted into the limiting post gaps, the circumferential cambered surfaces of the limiting posts abut against the workpiece.

Furthermore, the limiting column is in a conical shape with a thick upper part and a thin lower part.

Furthermore, a first drill bushing and a second drill bushing are sleeved in the first positioning hole and the second positioning hole respectively, and the inner diameters of the first drill bushing and the second drill bushing are equal to the inner diameters of the first hole and the second hole respectively.

Further, the length of the mandrel positioned outside the upright post is less than or equal to that of the inner arc surface of the workpiece.

Furthermore, a workpiece avoiding groove is formed in the inner corner where the upright column and the lower plate are connected.

Compare with current unilateral through drilling's technical scheme, utilize the utility model discloses back drilling precision is higher, and the difficult deviation of hole size is difficult for causing frequently disconnected drill bit phenomenon, practices thrift the cutter cost. Compare with the technical scheme of twice drilling of present lower floor, utilize the utility model discloses back efficiency is higher, and the precision is higher.

Drawings

FIG. 1 is a schematic view showing the structure of a workpiece to be drilled in examples 1-2.

FIG. 2 is a schematic view showing the structure of a workpiece after completion of drilling in examples 1-2.

Fig. 3 is a schematic structural view of the housing in accordance with embodiment 1-2.

FIG. 4 is a schematic view of the structure of the mandrel of examples 1-2.

Fig. 5 is a front view of fig. 4.

Fig. 6 is an enlarged left side view of fig. 5.

FIG. 7 is a schematic view of a workpiece to be drilled after being mounted on the cambered surface drilling tool in the embodiment 1-2.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Embodiment 1, a cambered surface drilling tool as shown in fig. 1-7 comprises

The seat body 1 is integrally C-shaped and comprises an upper plate 11, a lower plate 12 and an upright post 13 fixedly connected with the upper plate and the lower plate, wherein a mandrel hole 14 with the axial direction being the left-right direction is formed in the upright post, a seat body pin hole 15, a positioning hole I16 and a positioning hole II 17 with the axial direction being the up-down direction are formed in the upper plate 11 and the lower plate 12, and the pin hole 15 is communicated with the mandrel hole 14; when the intrados 101 of the workpiece 100 is concentric with the mandrel hole 14 and the left end face of the workpiece 100 is abutted against the inner side face of the upright 13, the first hole 103 and the second hole 102 to be drilled on the workpiece are concentric with the first positioning hole 16 and the second positioning hole 17;

the mandrel 2 comprises a large arc surface 21 and a small arc surface 22, the large arc surface 21 can be in clearance fit or transition fit with the inner arc surface 101 of the workpiece 100 and the mandrel hole 14 of the base body 1 respectively, a mandrel pin hole 23 is formed along the radial direction, a first guide semicircular hole 24 and a second guide semicircular hole 25 which are axially parallel to the mandrel pin hole 23 are formed in the small arc surface 22, and when the mandrel pin hole 23 is concentric with the base body pin hole 15 and the left end surface of the workpiece 100 is abutted to the inner side surface of the upright column 13, a first hole 103 and a second hole 102 to be drilled in the workpiece are concentric with the first guide semicircular hole 24 and the second guide semicircular hole 25;

and the positioning pin 3 passes through the base body pin hole 15 and is inserted into the mandrel pin hole 23.

During operation, one end of the mandrel 2 with the mandrel pin hole 23 is inserted into the mandrel hole 14, and then the positioning pin 3 penetrates through the base body pin hole 15 and is inserted into the mandrel pin hole 23, so that the mandrel is prevented from rotating. Then, a workpiece 100 to be drilled is placed in the base body 1 as shown in fig. 1, the mandrel 2 of the workpiece is abutted to the inner arc surface 101 of the workpiece, and because the inner arc surface 101 of the workpiece 100 to be drilled is a major arc surface, when the mandrel 2 is inserted into the semi-closed cavity of the inner arc surface 101 of the workpiece, the workpiece 100 to be drilled is basically locked in position and cannot be twisted, so that the tool can be placed on a bench drill together with the workpiece 100 to be drilled, two corresponding drill bits are clamped, and drilling operation can be performed. Due to the guiding effect of the first drill sleeve 5 and the second drill sleeve 6, when the drill bit enters the inner arc surface 101, the first guide semicircular hole 24 and the second guide semicircular hole 25 guide the drill bit, the tip of the drill bit is not subjected to radial force of one side any more, and the problems of hole deviation, drill bit fracture and the like are avoided. One through drilling can be realized.

In embodiment 2, in order to further improve the drilling accuracy and avoid the workpiece 100 from having a slight twist due to a play formed by the clearance fit between the major arc surface 21 of the mandrel 2 and the inner arc surface 101 of the workpiece 100, on the basis of

embodiment

2, 2 limiting holes 18 are formed in the upper plate 11 and the lower plate 12, and the axial direction of each limiting hole is the vertical direction; 2

spacing post

4, 2 spacing post 4 all are the taper shape of going up thick thin down, and after 2 spacing holes 18 were inserted in the clearance respectively, the circumference cambered surface of 2 spacing posts 4 butt work piece 100 respectively.

The first drill bushing 5 and the second drill bushing 6 are sleeved in the first positioning hole 16 and the second positioning hole 17 respectively, and the inner diameters of the first drill bushing 5 and the second drill bushing 6 are equal to the inner diameters of the first hole 103 and the second hole 102 respectively. The length of the mandrel 2 outside the column 13 is less than or equal to the length of the intrados 101 of the workpiece 100. The inside corner where the upright post 13 and the lower plate 12 are connected is provided with a workpiece avoiding groove 19.

During operation, one end of the mandrel 2 with the mandrel pin hole 23 is inserted into the mandrel hole 14, and then the positioning pin 3 penetrates through the seat body pin hole 15 and is inserted into the mandrel pin hole 23, so that the mandrel is prevented from rotating. Then, a workpiece 100 to be drilled as shown in fig. 1 is placed in the seat body 1, the mandrel 2 of the workpiece is abutted to the inner arc surface 101 of the workpiece, then the 2 limiting columns 4 are respectively inserted into the 2 limiting holes 18, and as the limiting columns 4 are in a conical shape with a thick upper part and a thin lower part, the circumferential arc surfaces of the limiting columns 4 gradually abut against the workpiece 100 along with the increase of the downward insertion depth, so that the workpiece 100 is limited from being twisted. Finally, the tool and the workpiece 100 to be drilled are placed on a bench drill together, and two corresponding drill bits are clamped, so that the drilling operation can be carried out. Due to the guiding effect of the first drill sleeve 5 and the second drill sleeve 6, when the drill bit enters the inner arc surface 101, the first guide semicircular hole 24 and the second guide semicircular hole 25 guide the drill bit, the tip of the drill bit is not subjected to radial force of one side any more, and the problems of hole deviation, drill bit fracture and the like are avoided. One through drilling can be realized. Compare with current unilateral through drilling's technical scheme, utilize the utility model discloses back drilling precision is higher, and the difficult deviation of hole size is difficult for causing frequently disconnected drill bit phenomenon, practices thrift the cutter cost. Compare with the technical scheme of twice drilling of present lower floor, utilize the utility model discloses back efficiency is higher, and the precision is higher.

Claims

1. The utility model provides an cambered surface drilling frock which characterized in that: comprises that

The seat body (1) is integrally C-shaped and comprises an upper plate (11), a lower plate (12) and an upright post (13) fixedly connected with the upper plate and the lower plate, a mandrel hole (14) with the axial direction being in the left-right direction is formed in the upright post, a seat body pin hole (15), a positioning hole I (16) and a positioning hole II (17) with the axial direction being in the up-down direction are formed in the upper plate (11) and the lower plate (12), and the pin hole (15) is communicated with the mandrel hole (14); when the inner arc surface (101) of the workpiece (100) is concentric with the mandrel hole (14) and the left end surface of the workpiece (100) is abutted against the inner side surface of the upright post (13), a first hole (103) and a second hole (102) to be drilled on the workpiece are concentric with a first positioning hole (16) and a second positioning hole (17);

the mandrel (2) comprises a large arc surface (21) and a small arc surface (22), wherein the large arc surface (21) can be in clearance fit or transition fit with an inner arc surface (101) of a workpiece (100) and a mandrel hole (14) of the base body (1) respectively, a mandrel pin hole (23) is formed in the radial direction, a first guide semicircular hole (24) and a second guide semicircular hole (25) which are axially parallel to the mandrel pin hole (23) are formed in the small arc surface (22), and when the mandrel pin hole (23) and the base body pin hole (15) are concentric and the left end face of the workpiece (100) is abutted to the inner side face of the upright column (13), a first hole (103) and a second hole (102) to be drilled in the workpiece are concentric with the first guide semicircular hole (24) and the second guide semicircular hole (25);

and the positioning pin (3) penetrates through the pin hole (15) of the base body and is inserted into the pin hole (23) of the mandrel.

2. The cambered surface drilling frock of claim 1, characterized in that: more than 1 limiting hole (18) which is vertical to the axial direction is formed in the upper plate (11) and the lower plate (12), and after the limiting column (4) is inserted into the limiting hole (18) in a clearance mode, the circumferential cambered surface of the limiting column (4) is abutted to the workpiece (100).

3. The cambered surface drilling tool according to claim 2, characterized in that: the limiting column (4) is in a conical shape with a thick upper part and a thin lower part.

4. The arc surface drilling tool according to claim 1, characterized in that: a first drill bushing (5) and a second drill bushing (6) are respectively sleeved in the first positioning hole (16) and the second positioning hole (17), and the inner diameters of the first drill bushing (5) and the second drill bushing (6) are respectively equal to the inner diameters of the first hole (103) and the second hole (102).

5. The arc surface drilling tool according to claim 1, characterized in that: the length of the mandrel (2) positioned outside the upright post (13) is less than or equal to that of the intrados (101) of the workpiece (100).

6. The cambered surface drilling frock of claim 1, characterized in that: the internal corner where the upright post (13) and the lower plate (12) are connected is provided with a workpiece avoiding groove (19).