CN201446412U - A new type of jig for drilling holes on arc surface - Google Patents

Abstract

A new type of fixture for arc surface drilling, which consists of a base, a support base, a drilling template, a pressing device, an adjusting screw, an alignment center, a fixed drill sleeve, a quick-change drill sleeve, and a hinge shaft assembly. Used in combination, the machining of the holes on the arc surface of the workpiece can be completed.

Description

A new type of jig for drilling holes on arc surface

technical field

The utility model belongs to the technical field of mechanical processing, manufacturing technology and equipment, and in particular relates to a novel circular arc surface drilling fixture.

Background technique

Generally speaking, the machining process of the hole on the arc surface is more complicated, especially the step hole drilling process on the arc surface is a more difficult process. Because it is necessary to accurately process stepped holes on the arc surface, it is necessary to consider not only how to easily clamp and reduce clamping deformation, but also consider the problems of inaccurate positioning and easy breakage of the drill bit when drilling on the curved surface. Convenient to meet the needs of mass production. According to conventional scribing processing or numerical control processing, the processing efficiency and quality are not ideal.

Contents of the invention

The technical problem solved by the utility model is to provide a new type of fixture for arc surface drilling, which consists of a base, a support seat, a drilling template, a pressing device, an adjusting screw, an alignment center, a fixed drill bushing, and a quick-change drill bushing. The combined use of the components and the hinge shaft assembly can complete the machining of the holes on the arc surface of the workpiece.

The technical solution adopted by the utility model: a new type of fixture for arc surface drilling, including a base, a hinge shaft support is fixed on one side of the base, a joint bolt support is fixed on the other side, and the adjustment seat supports are respectively It is connected with the hinge shaft support and the swing bolt support and fixed on the base. The adjustment seat support is provided with an adjustment screw for auxiliary support of the workpiece through floating adjustment; the front end of the base is fixed with a centering center. The back end is fixed with a top tightening device support with a top tightening screw; the base is equipped with a support screw and a V-shaped iron of equal height that uses the side to axially position the workpiece; the drilling template One end of the drill template is a cylinder and is connected to the hinge shaft support through the hinge shaft assembly. The other end of the drilling template is provided with a positioning stop and is matched with the step stop on the swing bolt support, and then pressed with the swing bolt positioning nut. Then use the pin assembly to connect; the left and right ends of the drilling template are equipped with fixed drill bushings and quick-change drill bushings that are set inside and fixed on the drilling template with drill sleeve screws. tighten the device.

There are two drilling templates and they are fixedly connected together through steel pipes.

There are six V-shaped irons, the opposite faces of which are chamfered, and are provided with reinforcing plates.

There are two hinge shaft supports, swing bolt supports and adjustment seat supports.

The pressing device is composed of a handle rod, a pressing screw, a pressure plate seat fixed on the top of the pressing screw, an adjusting jack screw and a pressing block.

The pressing block is made of copper material.

A sleeve is arranged in the hole on the centering center support.

Four eyebolts and four U-shaped grooves are arranged at the four corners of the upper end surface of the base.

The utility model has the advantages compared with the prior art:

1. The clamping and alignment processes are all completed in one clamping, which saves the drilling process;

2. On the premise of improving the processing quality, the cost of equipment will not be increased;

3. It can effectively protect the tool from damage, improve the service life of the tool and reduce the cost;

4. Compared with the original processing method, the processing efficiency has been greatly improved, and the processing quality is very stable;

5. For the operator, the operation method is greatly simplified, convenient and safe;

6. The structure is novel and unique, which provides ideas and practical experience for the design, development and manufacture of similar fixtures in the future.

Description of drawings

Fig. 1 is a front view of the structure of the utility model;

Fig. 2 is a left view of the structure of the utility model;

Fig. 3 is A-A sectional view of Fig. 1;

Fig. 4 is the B-B sectional view of Fig. 1;

Fig. 5 is the C-C sectional view of Fig. 1;

Fig. 6 is the front view of the base of the utility model;

Fig. 7 is the A direction view of Fig. 6;

Fig. 8 is the front view of the drill formwork structure of the utility model;

Fig. 9 is a sectional view of A-A of Fig. 8;

Fig. 10 is the A direction view of Fig. 8;

Fig. 11 is a schematic diagram of the pressing device of the present invention.

Detailed ways

The structure and working principle of the present utility model will be described in detail below in conjunction with the accompanying drawings.

A new type of clamp for arc surface drilling, including a base 20, two hinge shaft supports 19 are fixed on one side of the base 20, two swing bolt supports 22 are fixed on the other side, and an adjustment seat support 21 It is respectively connected with the hinge shaft support 19 and the swing bolt support 22 and fixed on the base 20. The adjustment seat support 21 is provided with an adjustment screw 2 for auxiliary support of the workpiece through floating adjustment; There is a centering top support 23 for aligning the top 13 on it, a sleeve 18 is arranged in the hole on the centering top support 23, and a top tightening device support with a top tightening screw 15 is fixed on the rear end 24. On the base 20, there are two supporting screws 14 and equal-height V-shaped irons 16 for axial positioning of the workpiece 17 by the side. 33; two drilling templates 7 are fixedly connected together by steel pipes, one end of the drilling template 7 is a cylinder and connected to the hinge shaft support 19 through the hinge shaft assembly 12, and the other end of the drilling template 7 is provided with a positioning notch 32 and cooperate with the step notch 28 on the swing bolt support 22, then use the swing bolt 8 positioning nut 9 to compress and then connect with the pin shaft assembly 11; the left and right ends of the drilling template 7 are provided with fixed drill sleeve 5 and the quick-change drill bushing 4 that is enclosed within it and is fixed on the drill template 7 with the drill bushing screw 3, and the middle of the drill template 7 is provided with a hold-down device 6, and the hold-down device consists of a handle rod 26, a hold-down screw rod 27 1. The pressure plate seat 29 fixed on the top of the compression screw 27, the adjustment top screw 28 and the compression block 30 are composed of the compression block 38, which is made of copper material, which effectively protects the surface of the workpiece 17 and prevents it from being damaged during the compression process. The workpiece 17 is deformed; four eyebolts 10 and four U-shaped grooves are arranged at the four corners of the upper end surface of the base 20 .

The working process of the utility model: firstly, the nut 9 is loosened, and the joint bolt 8 is rotated to the right along the rotating shaft, so that the two drilling templates 7 can freely rotate around the hinge shaft 12; the drilling template 7 is rotated along the hinge shaft 12 , place the workpiece 17 on the 4 identical V-shaped irons 16 in the clamp body, and adjust the left and right direction of the workpiece by using the 4 adjustment bolts 2 on both sides of the clamp body, so that the arc drawn on the end surface of the workpiece is perpendicular to the center line The aligning top 13 facing the end face of the clamp body, the workpiece 17 is always tangent to the V-shaped iron 16 during the left and right adjustment process. This operation can ensure that the symmetrical center line of the arc is perpendicular to the bottom surface of the clamp body, that is, the work table, and at the same time It coincides with the left and right two sets of V-shaped iron 16-point midlines. Since the drill sleeve holes on the two drilling templates 7 and the V-shaped iron 16-point midlines are manufactured, the size between the two is strictly guaranteed, so it is also very strict. The size of the hole and the circular arc are symmetrically divided. Secondly, the workpiece 17 is tightened axially with the tightening screw 15, so that the end face of the large outer circle step at one end of the workpiece 17 is cut tightly to align the V-shaped iron 16 on the side of the top 13. The end face, because the size between the drill sleeve hole on the two drilling templates 7 and the inner end face of the V-shaped iron 16 is strictly guaranteed, so the size of the hole and the end face of the workpiece 17 is also strictly guaranteed. At the same time Because the size of the end face of the large outer circle step at both ends is different from that of the small outer circle end face, if you want to put the workpiece 17 in the opposite direction, it will not be placed between the two V-shaped irons 16. Through the above operations, the workpiece 17 can be completely positioned At the exact processing position, adjust the support screw 14 to make it contact with the outer arc surface of the workpiece 17 to play an auxiliary support role. Unscrew the two drilling templates 7 along the hinge shaft 12 so that the right end of the positioning stop 22 is in line with the movable Cooperate with the notches on the joint bolt support 22, because the notches on the hinge shaft 12 at the left end and the joint bolt 8 at the right end limit the six degrees of freedom of the drilling template 7 respectively, so they can be positioned accurately. The drilling bushing hole on the drilling template 7 and the seam on the hinge shaft 12 at the left end and the hinge bolt 8 at the right end are processed to ensure a very accurate positional relationship, and the hinge shaft 12 and the hinge shaft 12 at the right end are strictly guaranteed during manufacture. The size between the seam on the fixing seat of the joint bolt 8 and the four identical V-shaped irons 16, so the hole distance and the size of the hole and the end face can be accurately guaranteed. Finally, use the joint bolt 8 to connect the two drilling templates 7 Compress, and then use two compression devices 6 to compress the workpiece 17, use a drill to drill the small hole corresponding to the quick-change drill sleeve 4, remove the quick-change drill sleeve 4, and drill the stepped hole corresponding to the fixed drill sleeve 5. Loosen the nut 9, rotate the joint bolt 8, unscrew the drilling template 7, take out the workpiece 17, and complete the machining of the upper hole of the workpiece 17.

Claims (7)

1. boring anchor clamps of novel arc surface, comprise base (20), it is characterized in that: the side at base (20) is fixed with hinge axis bearing (19), opposite side is fixed with eyelet bolt bearing (22), adjust seat bearing (21) and be connected to a fixed on base (20) with hinge axis bearing (19) and eyelet bolt bearing (22) respectively, adjust seat bearing (21) and be provided with by the unsteady adjustment screw rod (2) that workpiece is carried out supplemental support of adjusting; Front end at base (20) is fixed with the top bearing of centering (23) which is provided with centering top (13), and the rear end is fixed with the holding device bearing (24) which is provided with fastening screw (15); On base (20), be provided with supporting screw (14) and utilize the side workpiece (17) to be carried out the contour v block (16) of axial location; One end of bushing plate (7) is cylinder and is connected on the hinge axis bearing (19) by hinge axis assembly (12) that the other end of bushing plate (7) is provided with positioning spigot (32) and uses bearing pin assembly (11) to be connected again with back the compressing with eyelet bolt (8) setscrew nut (9) of stage seam (28) cooperation on the eyelet bolt bearing (22); The two ends, the left and right sides of bushing plate (7) are equipped with fixing drill bushing (5) and are placed in it and are fixed in quick change drill bushing (4) on the bushing plate (7) with drill bushing screw (3), and the centre of bushing plate (7) is provided with hold down gag (6).

2. the boring anchor clamps of a kind of novel arc surface according to claim 1 is characterized in that: described bushing plate (7) is two and is fixed together by steel pipe.

3. the boring anchor clamps of a kind of novel arc surface according to claim 1 and 2, it is characterized in that: described v block (16) is six, its opposite face top rake, and be provided with stiffener (33).

4. the boring anchor clamps of a kind of novel arc surface according to claim 1 and 2 is characterized in that: described hinge axis bearing (19), eyelet bolt bearing (22) and an adjustment seat bearing (21) are two.

5. the boring anchor clamps of a kind of novel arc surface according to claim 1 and 2 is characterized in that: described hold down gag (6) by the horizontal handlebar (26) that is inserted in clamping screw (27) upper end, be fixed on the platen seat (29) of clamping screw (27) bottom and the compact heap (30) that is arranged on the adjustment jackscrew (28) of platen seat (29) both sides and is arranged on platen seat (29) downside constitutes

6. the boring anchor clamps of a kind of novel arc surface according to claim 1 and 2 is characterized in that: be provided with sleeve (18) in the hole on the top bearing of described centering (23)

7. the boring anchor clamps of a kind of novel arc surface according to claim 1 and 2 is characterized in that: the Si Jiaochu of described base (20) upper surface is provided with four lifting bolts (10) and four U type grooves.

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