Self-positioning reaming device

Abstract

The utility model discloses a self-positioning chambering device which comprises a positioning tool, a base, a supporting seat, a clamp and a chambering drill bit. The positioning tool comprises a pair type supporting block, a floating positioning pin and a positioning bushing. The positioning bushing is used in cooperation with the floating positioning pin to position the part to be reamed and then used in cooperation with the reaming drill bit to position the reaming drill bit, the purpose that a machined hole and an original hole are concentric is achieved, and the influence of poor overall consistency of the part caused by springback deviation of the part and the like is avoided; during processing, the reamer bit can be fixed on a radial drill or a bench drill for use, or can be mounted on a handheld tool for use, and the operation is flexible; the device can be used for reaming stamping parts of different materials and thicknesses, is also suitable for assembly parts of double-layer plate materials, and is suitable for positioning holes with high requirements for position degree and hole diameter precision.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping sheet metal parts processing, in particular to a self-positioning hole expanding device. Background Art

[0002] When the stamping parts are produced, if the hole diameter needs to be enlarged, conventional tools can be used for manual hole enlargement, such as using tools such as hole expanders, pagoda drills, and grinding heads for grinding and enlarging. The technical problems are low efficiency and poor precision.

[0003] In order to solve the defects of manual hole expansion, technicians in this field proposed to use laser cutting equipment for cutting, which requires the production of special brackets for positioning and placement. Therefore, the accuracy of the hole after laser cutting depends on the repeatability of the positioning tooling, and the production cost of high-precision positioning brackets is high. In addition, the edge roughness of the laser-cut hole is poor, and the quality is difficult to meet the requirements, especially for thick plates and parts with high precision requirements. Summary of the invention

[0004] To solve the above technical problems, the utility model provides a self-positioning reaming device. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0005] The utility model adopts the following technical solutions:

[0006] A self-positioning reaming device is provided, comprising: a reaming drill bit, a positioning tool, and the positioning tool comprises: a supporting block, a floating positioning pin and a positioning sleeve;

[0007] The top of the supporting block is provided with a bearing table for placing the part to be expanded, the bearing table is provided with an avoidance groove, the positioning sleeve is arranged in the avoidance groove, and the positioning sleeve is provided with a positioning hole, and the expansion drill bit is provided with a drill side positioning pin adapted to the positioning hole;

[0008] The floating locating pin comprises: a part aperture matching column and a locating side locating pin matched with the locating hole, and the locating side locating pin is arranged on the part aperture matching column.

[0009] Furthermore, the avoidance groove is an upper-open cylindrical groove; the positioning sleeve is a cylindrical pipe sleeve, and the positioning hole is a cylindrical groove located at the center of the positioning sleeve; the drill side positioning pin and the positioning side positioning pin are both cylindrical structures.

[0010] Furthermore, the aperture of the positioning hole is 6 mm, and the outer diameters of the drill side positioning pin and the positioning side positioning pin are both 6 mm.

[0011] Furthermore, the self-positioning reaming device further includes: a base; at least one positioning tool is arranged on the upper surface of the base, and the auxiliary support block is connected to the base by screws and pins.

[0012] Furthermore, the self-positioning reaming device further includes: a support seat and a clamp disposed on the support seat; the support seat is disposed on the upper surface of the base and is located on the side of the auxiliary support block.

[0013] Furthermore, a waste discharge hole is provided in the avoidance groove.

[0014] Furthermore, the reaming drill bit comprises: a shank and a cutting portion; the cutting portion is provided with a circumferential cutting edge and a bottom cutting edge.

[0015] Beneficial effects brought by the utility model:

[0016] 1. The present application uses a positioning sleeve to first be used in conjunction with a floating positioning pin to position the part to be enlarged, and then is used in conjunction with a reaming drill to position the reaming drill, so as to achieve the purpose of making the processed hole concentric with the original hole, without being affected by the poor overall consistency of the part caused by the springback deviation of the part itself;

[0017] 2. During processing, the reaming drill bit can be fixed on a radial drill or bench drill, or installed on a handheld tool for flexible operation;

[0018] 3. This application can meet the needs of expanding holes in stamping parts of different materials and thicknesses, even for assembly parts of double-layer sheets, and is suitable for positioning holes with high requirements for position and aperture accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a self-positioning hole-expanding device of the utility model;

[0021] Figure 2 It is a schematic diagram of the positions of the auxiliary support block, the positioning sleeve and the floating positioning pin of the utility model when they are used in combination;

[0022] Figure 3 It is a schematic diagram of the positions of the auxiliary support block, the positioning sleeve and the reaming drill pin of the utility model when they are used in combination;

[0023] Figure 4 It is a structural schematic diagram of the auxiliary support block of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the utility model reaming drill bit. DETAILED DESCRIPTION

[0025] The following is a detailed description of the embodiments of the utility model in conjunction with the accompanying drawings. It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-5 As shown, in some illustrative embodiments, a self-positioning reaming device is provided, comprising: a positioning tool, a base 1, a support seat 2, a clamp 3 and a reaming drill bit 4.

[0027] The positioning tooling comprises: a supporting block 5 , a floating positioning pin 6 and a positioning sleeve 7 .

[0028] At least one positioning fixture is disposed on the upper surface of the base 1. Multiple positioning fixtures can realize the expansion operation of multiple parts 8 at the same time, and each positioning fixture can be designed to have different heights to adapt to the use of parts 8 of different sizes. The supporting block 5 is connected to the base 1 by screws and pins, the screws are used for fixing, and the pins are used for positioning.

[0029] The support seat 2 is arranged on the upper surface of the base 1 and on the side of the auxiliary support block 5, and one positioning fixture corresponds to one support seat 2. A clamp 3 is arranged on the top of the support seat 2, and the clamp 3 is used to fix the part 8 so that the part 8 will not shift after the positioning is completed.

[0030] The top of the supporting block 5 is provided with a bearing table 501 for placing the part to be expanded, and the bearing table 501 is provided with an avoidance groove 502, which is an upper-open cylindrical column groove, and a waste discharge hole 503 is provided at the bottom of the avoidance groove 502. The avoidance groove 502 is used to avoid the expansion drill 4 and temporarily store some waste chips, and the waste discharge hole 503 provided at the bottom of the avoidance groove 502 is used to discharge the chips at the bottom.

[0031] The positioning sleeve 7 is arranged in the avoidance groove 502, the inner diameter of the avoidance groove 502 is the same as the outer diameter of the positioning sleeve 7, and the positioning sleeve 7 is provided with a positioning hole 701. Specifically, the positioning sleeve 7 is a cylindrical sleeve structure, and the positioning hole 701 is a cylindrical column groove located at the center of the positioning sleeve 7, that is, the axis of the positioning hole 701 coincides with the axis of the positioning sleeve 7.

[0032] The floating locating pin 6 includes: a part aperture matching column 601 and a positioning side locating pin 602, wherein the positioning side locating pin 602 is arranged at the bottom of the part aperture matching column 601, and the two are an integrally formed structure. The part aperture matching column 601 is used to match with the original hole on the part, and the positioning side locating pin 602 is adapted to the positioning hole 701 to achieve the positioning of the part 8, that is, the center of the original hole of the part is consistent with the center of the hole of the avoidance groove 502 through the floating locating pin 6.

[0033] The reaming drill bit 4 is provided with a drill bit side positioning pin 44 that matches the positioning hole 701, that is, the drill bit side positioning pin 44 makes the drilling route of the reaming drill bit 4 consistent with the hole center of the avoidance groove 502, so that the reaming position formed after the reaming drill bit 4 drills the hole is consistent with the center of the original hole position. In this article, matching means that the drill bit side positioning pin 44 and the positioning side positioning pin 602 are both cylindrical structures, the aperture of the positioning hole 401 is 6mm, and the outer diameters of the drill bit side positioning pin 44 and the positioning side positioning pin 602 are both 6mm, that is, both can be embedded in the positioning hole 401.

[0034] The reamer drill 4 includes: a shank 41 and a cutting part; the cutting part is provided with a circumferential cutting edge 42 and a bottom cutting edge 43. The reamer drill 4 is made of high-speed steel and processed in one piece. The surface of the shank 41 is knurled to prevent slipping during clamping. The bottom cutting edge 43 is used to cut away the material of the processed hole, and the circumferential cutting edge 42 ensures the roughness quality of the processed hole. The drill side positioning pin 4 is inserted into the positioning hole 701 during processing to ensure that the center of the processed hole is concentric with the positioning sleeve 7.

[0035] When the part 8 is placed on the supporting block 5, the positioning side positioning pin 602 at the bottom of the floating positioning pin 6 cooperates with the positioning hole 701 at the center of the positioning sleeve 7, and the accurate position of the part is determined by inserting the positioning hole 701. The clamp 3 is used to press the placed part to prevent shaking. When the part 8 is accurately placed and clamped, the floating positioning pin 6 is pulled out, and then the reaming drill bit 4 is installed on a radial drilling machine or a bench drill to expand the hole of the part.

[0036] The present application realizes concentricity with the original hole position through positioning tooling and the improved hole enlarging drill bit 4, ensures the position and diameter quality of the hole, and achieves the purpose of enlarging the hole diameter on the stamped sheet metal part, that is, the positioning sleeve 7 and the floating positioning pin 6 are used in combination to achieve the center of the enlarged hole position consistent with the original hole position, with an error of 0.1mm. The improved hole enlarging drill bit 4 can be installed on a radial drill or a bench drill for processing, with good cutting surface quality and low processing and manufacturing cost.

[0037] This application designs a set of positioning tooling and a matching reaming drill bit 4 for holes with high requirements on diameter and position, which replaces the mold to achieve hole diameter expansion, and uses a floating positioning pin 6 to position and ensure concentricity with the original hole position. At the same time, the improved reaming drill bit 4 ensures the processing quality of the hole, can be operated by one person, and has high practical value.

[0038] In actual operation:

[0039] Step 1: Place the part to be processed on the bearing table 501, insert the floating positioning pin 6 into the hole to be expanded to position the part 8. The specific operation is to move the part position to ensure that the floating positioning pin 6 can pass through the hole to be expanded, and insert the positioning side positioning pin 602 into the positioning hole 701 in the center of the positioning sleeve. At this time, the outer diameter of the floating positioning pin 6 matches the hole diameter of the part before expanding, ensuring that the hole and the positioning sleeve 7 are concentric;

[0040] Step 2: After positioning, clamp the part with the clamp 3, and then remove the floating positioning pin 6;

[0041] Step 3: Use a radial drill equipped with a reaming drill bit 4 to perform drilling operations;

[0042] Step 4: After the processing is completed, open the clamp 3, take out the part and clean up the debris, and prepare to process the next part.

[0043] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A self-positioning reaming device, comprising: The reaming drill bit is characterized in that it also includes: a positioning tool, and the positioning tool includes: a supporting block, a floating positioning pin and a positioning sleeve; The top of the supporting block is provided with a bearing table for placing the part to be expanded, the bearing table is provided with an avoidance groove, the positioning sleeve is arranged in the avoidance groove, and the positioning sleeve is provided with a positioning hole, and the expansion drill bit is provided with a drill side positioning pin adapted to the positioning hole; The floating locating pin comprises: a part aperture matching column and a locating side locating pin matched with the locating hole, and the locating side locating pin is arranged on the part aperture matching column.

2. A self-positioning reaming device according to claim 1, characterized in that: The avoidance groove is a cylindrical groove with an upper opening; the positioning sleeve is a cylindrical pipe sleeve, and the positioning hole is a cylindrical groove located at the center of the positioning sleeve; the drill side positioning pin and the positioning side positioning pin are both cylindrical structures.

3. A self-positioning reaming device according to claim 2, characterized in that: The aperture of the positioning hole is 6 mm, and the outer diameters of the drill side positioning pin and the positioning side positioning pin are both 6 mm.

4. A self-positioning hole-expanding device according to claim 3, characterized in that: Also includes: Base; at least one positioning fixture is arranged on the upper surface of the base, and the supporting block is connected to the base by screws and pins.

5. A self-positioning hole-expanding device according to claim 4, characterized in that: It also includes: a support seat and a clamp arranged on the support seat; the support seat is arranged on the upper surface of the base and is located on the side of the auxiliary support block.

6. A self-positioning reaming device according to claim 5, characterized in that: A waste discharge hole is arranged in the avoidance groove.

7. A self-positioning hole-expanding device according to claim 6, characterized in that: The reaming drill bit comprises a shank and a cutting portion; the cutting portion is provided with a circumferential cutting edge and a bottom cutting edge.

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