CN218964102U

CN218964102U - Clamping frock that filler strip drilling was used

Info

Publication number: CN218964102U
Application number: CN202223409728.9U
Authority: CN
Inventors: 李凌; 沈照裕; 虞世君; 朱明辉; 陈�峰
Original assignee: Zhenhai Petrochemical Construction And Installation Engineering Co ltd
Current assignee: Zhenhai Petrochemical Construction And Installation Engineering Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-05-05
Anticipated expiration: 2032-12-19

Abstract

Clamping frock that filler strip drilling was used, including base, supporter and holder, its characterized in that: the support body is designed into a strip-shaped structure, a boss for placing a filler strip to be drilled is arranged on at least one side surface of the support body along the length direction of the support body, and the distance between the top surface of the boss and the top surface of the support body is not less than twice the height of the filler strip; the clamping piece comprises a pressing strip hinged on the base and capable of overturning along the width direction of the support body and a bracket capable of overturning along the length direction of the support body, the pressing strip is located at the side of the support body and opposite to the boss, a cam located at the outer side of the pressing strip is hinged on the bracket, the cam can prop against the outer side face of the pressing strip after rotating, so that the pressing strip can clamp the backing strip on the boss, a positioning groove extending transversely along the support body is further formed in the support body, and the positioning pin can be simultaneously inserted into the positioning groove and the arc-shaped groove of the backing strip. By adopting the utility model, the matching precision of the through holes on the two filler strips can be ensured.

Description

Clamping frock that filler strip drilling was used

Technical Field

The utility model relates to the technical field of clamping tools for drilling, in particular to a clamping tool for drilling a filler strip.

Background

The winding tube type heat exchanger is a novel efficient heat exchanger and mainly comprises heat exchange tubes spirally wound on a central tube from inside to outside, and the heat exchange tubes in each layer are positioned through filler strips. The structure of the packing strip is also diversified at present, such as the structure disclosed in the document of Chinese patent grant publication No. CN214842720U filed by the applicant, the packing strip comprises a packing strip body, a plurality of bulges are convexly arranged on the upper surface of the packing strip body along the length direction at intervals, an arc-shaped groove matched with the heat exchange tube of the winding tube type heat exchanger is formed between two adjacent bulges, and a through hole is formed on the bottom wall of the arc-shaped groove. I.e. the body of the filler strip needs to be drilled so that two radially adjacent filler strips are fixed together by fasteners.

In the wound tube heat exchanger, the spiral directions of the adjacent heat exchange tubes are opposite, so that the arc-shaped grooves on the two adjacent radial backing strips matched with the heat exchange tubes respectively show a left-handed structure and a right-handed structure in the width direction of the backing strips, the through holes on the two adjacent backing strips are matched in pairs, and the drilling precision requirement is relatively high.

At present, the through holes on the filler strip are manually marked, then the rocker arm drill on the bench vice is used for drilling holes, and only one through hole can be drilled at a time. The length of the filler strips is long, so that the filler strips are required to be clamped repeatedly, the drilling efficiency is low, the machining precision is difficult to ensure, and the radial adjacent through holes on the two filler strips cannot be aligned when the subsequent pipe winding operation is performed, so that the production efficiency is finally affected.

If the existing numerical control drilling machine is used for drilling, the clamping tool provided with the clamping tool cannot clamp and align the filler strip. The existing drilling tools for other bar-shaped workpieces, such as the structure disclosed in the document with the Chinese patent grant publication number of CN212735056U, cannot be suitable for clamping the special-shaped filler strip. Further improvements are still needed.

Disclosure of Invention

Aiming at the current state of the art, the utility model provides a clamping tool for drilling filler strips so as to ensure the matching precision of through holes of two filler strips.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a clamping frock that filler strip drilling was used, includes the base, installs the supporter that is used for placing the filler strip of waiting to drill on the base and is used for the holder of the filler strip of centre gripping waiting to drill, its characterized in that: the support body is designed into a strip-shaped structure, a boss for placing a filler strip to be drilled is arranged on at least one side surface of the support body along the length direction of the support body, and the distance between the top surface of the boss and the top surface of the support body is not less than twice the height of the filler strip; the clamping piece comprises a pressing strip hinged to the base and capable of overturning along the width direction of the support body, and a bracket hinged to the base and capable of overturning along the length direction of the support body, wherein the pressing strip is located at the side of the support body and opposite to the boss, a cam located at the outer side of the pressing strip is hinged to the bracket, the cam can abut against the outer side face of the pressing strip after rotating, so that the pressing strip can clamp the backing strip on the boss, a positioning groove extending along the transverse direction of the support body is formed in the support body, and a positioning pin can be inserted into the positioning groove and the arc-shaped groove of the backing strip at the same time.

In order to improve the drilling efficiency, preferably, the two sides of the supporting body are provided with the convex strips, and the number of the pressing strips is two correspondingly. Therefore, two groups of backing strips can be clamped at a time, and if two drilling holes on the drilling machine are matched, the processing of four backing strips can be completed at a time.

In the above improvement, preferably, the bracket is designed into a U shape, the cam is located on one side wall of the bracket, the other side wall of the bracket is connected with a thimble in a threaded manner, and the end of the thimble can be abutted against the outer side surface of the holding strip on the corresponding side. In the use, rotate the cam earlier and compress tightly initially, then fine setting is carried out through rotatory thimble to the rethread for the pressure of both sides holds the strip and is pressed from both sides the laminating of filler strip better.

In the above aspects, the top surface of the support body may be provided with a clamping screw hole, and a clamping bolt for propping against the filler strip to be drilled is connected in the clamping screw hole, so that vibration of the filler strip in the drilling process and upward movement along with the drill bit after the drilling is completed can be effectively prevented by using the clamping bolt.

In each of the above embodiments, the support body has a long groove extending in a longitudinal direction of the support body on a side surface below the boss, and the long groove preferably has a V-shaped cross section. Thus, the contact area between the clamping strip and the clamping strip can be reduced, and the processing is also convenient.

In each of the above schemes, a baffle plate for restricting the filler strip to be drilled on the boss is fixed on the side surface of the support body, so as to avoid the filler strip on the boss from falling.

In each scheme, two positioning pins are respectively distributed at intervals along the length direction of the support body, so that the positioning accuracy is further improved.

To facilitate application of force to the cam, the cam is located on an end of a handle.

Compared with the prior art, the support body is provided with the boss for placing the backing strips, and the distance between the top surface of the boss and the top surface of the support body is not smaller than twice the height of the backing strips, so that when the backing strips are clamped, two backing strips respectively provided with left-handed and right-handed arc grooves can be spliced and placed on the boss, the arc grooves on the two backing strips are spliced into complete spiral holes, then the pressing strip is pressed against the backing strips to be drilled by virtue of the cams on the support, then the positioning pins are stretched into the arc grooves, so that the two backing strips to be drilled are kept at the same relative position, and then the drill bit on the drilling equipment can drill the two backing strips from top to bottom.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present utility model (clamping a backing strip to be drilled);

FIG. 2 is a schematic perspective view of the other direction of FIG. 1;

FIG. 3 is a schematic perspective view of the device of FIG. 1 in another direction (with one side of the clamping bar and two locating pins removed);

FIG. 4 is an exploded perspective view of the orientation of FIG. 3;

fig. 5 is a perspective view of the clamping member of fig. 1 in a relaxed state.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present utility model, it should be understood that the terms "long", "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer", "wide", "high", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present utility model may be arranged in different directions, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to directions opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

The clamping tool for drilling the filler strip comprises a base 1, a supporting body 2, a clamping piece and a positioning pin 3, wherein the base 1 is used for being fixed on a working table of drilling equipment, and the drilling equipment can adopt an existing numerical control drilling machine so as to improve drilling efficiency. In combination with the numerically-controlled drilling machine, the base 1 is preferably composed of two bottom plates 11, the two bottom plates 11 are symmetrically distributed below two end portions of the supporting body 2, two mounting holes 12 are formed in each bottom plate 11, and the two bottom plates are mounted at proper positions of the workbench surface through bolts and the like.

The support body 2 is mounted on the base 1 for placing the filler strip a to be drilled, in this embodiment, the support body 2 is designed into a strip-shaped structure, two ends of the support body 2 are respectively provided with an upper through hole 21 and a lower through hole 21 corresponding to the mounting hole 12 on the bottom plate 11, and the bolts are connected into the screw holes on the working table after passing through the through holes 21 and the mounting holes 12, so that the assembly is more convenient. In order to mount the filler strip a to be drilled, a boss 22 on which the filler strip a to be drilled is placed is provided on at least one side surface of the support body 2 in the length direction thereof, and a distance between the top surface of the boss 22 and the top surface of the support body 2 is not less than twice the height of the filler strip a; in order to place more spacer bars to be drilled as much as possible on the same support body 2, in this embodiment, the bosses 22 are designed on both sides of the support body 2.

The clamping piece is used for clamping a backing strip to be drilled on a boss 22, and comprises pressing strips 4, a bracket 5 and a cam 6, wherein the pressing strips 4 are positioned at the side of a support body 2 and are opposite to the boss 22, and as two bosses 22 are arranged, two pressing strips 4 are respectively positioned at two sides of the support body 2, connecting columns 41 are arranged on the bottom surfaces of two ends of each pressing strip 4, and each connecting column 41 is hinged on a corresponding bottom plate 11 through a first pin shaft 7a, so that each pressing strip 4 can turn over along the width direction of the support body 2. The two brackets 5 are hinged on the corresponding bottom plate 11 through second pin shafts 7b, so that each bracket 5 can turn over along the length direction of the support body 2. Because there are two pressing strips 4, in this embodiment, the support 5 is preferably designed into a U shape, so that the support 2 and the pressing strips 4 on both sides are located in the support 5, the cam 6 is hinged on one side wall of the support 5 through the third pin shaft 7c and located at the outer side of the corresponding pressing strip 4, and the other side wall of the support 5 is provided with a thimble 8 in threaded connection, and the end of the thimble 8 can abut against the outer side surface of the pressing strip 4 on the corresponding side to enable the pressing strip 4 to clamp the gasket strip a on the boss 22. In consideration of the ease of biasing force when rotating the cam 6, the cam 6 is located at one end of the handle 61 in the drawing, and therefore, the cam 6 can be rotated about the third pin 7c by pulling the other end of the handle 61.

Meanwhile, the support body 2 is also provided with positioning grooves 23 extending transversely along the support body 3, the positioning pins 3 can be inserted into the arc-shaped grooves A1 of the filler strips A after passing through the positioning grooves 23, two positioning pins are respectively distributed at intervals along the length direction of the support body 2 in the figure for positioning more reliably, and the cross section of the positioning pins 3 is square so as to be clamped with the arc-shaped grooves A1 of the upper and lower filler strips simultaneously. Of course, the cross section of the positioning pin 3 can also be designed in a circular configuration. In this case, the holding strip 4 may be provided with the escape groove 42, but the top surface of the holding strip may be designed to be lower than the positioning groove.

After the spacer a to be drilled is placed on the boss 22 on the support body 2, in order to prevent the placed spacer a from falling off the boss without pressing the holding strip 4, further, the baffle plates 9 are respectively detached and connected on two side surfaces of the support body 2, specifically, the baffle plates 9 can be fixed in screw holes on the side surfaces of the support body 2 by bolts so as to be used for restraining the spacer a to be drilled. Meanwhile, in order to prevent the side surface of the support body 2 from interfering with the pressing of the pressing strip 4 when the pressing strip 4 is pressed, the side surface of the support body 2 below the boss is provided with a long groove 24 extending along the length direction of the support body, and the section of the long groove 24 is V-shaped so as to reduce the contact area with the pressing strip 4. Meanwhile, after the drilling is finished, the filler strip is prevented from moving upwards along with the drill bit, a clamping screw hole 25 is further formed in the top surface of the support body, and a clamping bolt 10 used for propping against the filler strip A to be drilled is connected in the clamping screw hole 25.

When the clamping tool is used, two backing strips with left-handed and right-handed arc grooves are spliced, so that the arc grooves on the two backing strips are spliced into a complete spiral hole and then are placed on a boss, and as the bosses are arranged on two sides of the supporting body, the clamping tool can clamp two groups of backing strips (namely four backing strips) at the same time; then, the two locating pins extend into the corresponding arc-shaped grooves (namely spiral holes at the moment) through the locating grooves on the respective supporting bodies respectively, so that the two backing strips to be drilled are kept at the same relative positions, and the purpose of matching holes at the same positions is achieved; then the bracket is rotated again to enable the bracket to stand vertically (as shown in figure 1); then, a handle on the bracket is rotated to enable the cam to push the pressing strip to rotate towards the support body side, so that the pressing strip presses two cushion strips on the corresponding side; then the thimble on the other side of the bracket is rotated, the thimble on the two brackets is utilized to enable the clamping strips on the other side to turn over to the supporting body, and the two backing strips on the corresponding side boss are compressed, at the moment, the thimble is rotated to enable the pressing strips to be more attached to the backing strips on the corresponding side. Finally, the clamping bolt on the top surface of the support body is rotated, and the head of the clamping bolt is pressed on the top surface of the pad strip above, so that the risks that the pad strip bounces up and down and possibly moves upwards along with the drill bit in the drilling process are prevented.

And then the numerical control drilling machine sequentially drills two pairs of filler strips on the clamping tool according to a set fixing program. Obviously, because two filler strips are drilled from top to bottom at the same time in each drilling, the hole matching precision between the two filler strips can be effectively ensured. After the processing is finished, the clamping bolt is unscrewed, the handle is reversely rotated, then the support is tilted to a state shown in fig. 5, at the moment, after the clamping strips at the two sides are free of the restraint of the cam and the thimble, the clamping strips are turned towards the direction away from the supporting body (namely towards the outer side), and then the paired backing strips can be taken out. Obviously, by adopting the fixture, the clamping is easy, the assembly and disassembly speed is high, and the fixture can be suitable for clamping filler strips with different specifications.

Claims

1. The utility model provides a clamping frock that filler strip drilling was used, includes base (1), installs support body (2) that are used for placing the filler strip of waiting to drill on the base and the holder that is used for the filler strip of centre gripping waiting to drill, its characterized in that: the support body (2) is designed into a strip-shaped structure, a boss (22) for placing a filler strip to be drilled is arranged on at least one side surface of the support body (2) along the length direction of the support body, and the distance between the top surface of the boss (22) and the top surface of the support body (2) is not less than twice the height of the filler strip; the clamping piece comprises a pressing strip (4) hinged to the base and capable of overturning along the width direction of the supporting body and a support (5) hinged to the base and capable of overturning along the length direction of the supporting body, the pressing strip (4) is located at the side of the supporting body (2) and opposite to the boss (22), a cam (6) located at the outer side of the pressing strip (4) is hinged to the support (5), the cam can abut against the outer side face of the pressing strip (4) after rotating, so that the pressing strip (4) can clamp the cushion strip on the boss (22), a positioning groove (23) extending along the transverse direction of the supporting body is formed in the supporting body (2), and the positioning pin (3) can be simultaneously inserted into the positioning groove (23) and the arc-shaped groove of the cushion strip.

2. The clamping tool for filler strip drilling of claim 1, wherein: the two sides of the supporting body (2) are provided with the bosses (22), and two corresponding pressing strips (4) are arranged.

3. The clamping tool for filler strip drilling according to claim 2, wherein: the support (5) is designed into a U shape, the cam (6) is positioned on one side wall of the support, the other side wall of the support is connected with a thimble (8) in a threaded manner, and the end part of the thimble can be abutted against the outer side surface of the holding strip (4) on the corresponding side.

4. The clamping tooling for drilling the filler strip according to claim 1, 2 or 3, wherein: the top surface of the support body (2) is provided with a clamping screw hole (25), and a clamping bolt (10) which is used for propping against a filler strip to be drilled is connected in the clamping screw hole (25).

5. The clamping tooling for drilling the filler strip according to claim 1, 2 or 3, wherein: the side surface of the support body (2) below the boss is provided with a long groove (24) extending along the length direction of the support body.

6. The clamping tooling for drilling the filler strip according to claim 1, 2 or 3, wherein: and a baffle (9) for restraining the filler strip to be drilled on the boss is also fixed on the side surface of the support body (2).

7. The clamping tooling for drilling the filler strip according to claim 1, 2 or 3, wherein: the number of the positioning pins (3) is two, and the positioning pins are distributed at intervals along the length direction of the supporting body (2).

8. The clamping tooling for drilling the filler strip according to claim 1, 2 or 3, wherein: the cam (6) is located on an end of a handle (61).