Positioning and drilling device for thin-wall sleeve part

Abstract

The utility model belongs to the technical field of machining tools, and discloses a thin-wall sleeve part positioning and drilling device which comprises a drill jig base, a pressing plate and a fastening bolt. Due to the fact that the number of the first machining round holes of the thin-wall sleeve part is an even number larger than 2, the number of the side faces of the drill jig base is an even number larger than 2, each side face of the regular polygon prism is provided with a side face parallel to each other, each side face is provided with a first guide hole, and the first guide holes correspond to the first machining round holes to be machined. Due to the fact that the thin-wall sleeve piece to be machined is fixed in the drill jig base, the first guide hole and the second guide hole can guide the drill bit, and the phenomena that the thin-wall sleeve piece is difficult to position when a cylinder part is drilled, and the outer surface of the thin-wall sleeve piece is prone to being scratched are avoided. According to the thin-wall sleeve part positioning device, manual scribing and manual positioning are omitted, so that the machining procedure is simplified, and the drilling efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of machining tooling technology, and in particular to a positioning and drilling device for thin-walled sleeve parts. Background Technology

[0002] In the traditional fitter industry, drilling thin-walled parts has always been a challenge. Due to their thin walls, they are prone to deformation during drilling, and clamping is difficult, making it hard to determine the positioning reference. This is especially true when machining evenly distributed holes, where the relative dimensions are hard to guarantee.

[0003] For example, such as Figure 1 As shown, a thin-walled sleeve with a wall thickness of only 1 mm includes a cylindrical part and an end face extending into the cylinder from one end of the cylindrical part. The end face has a circular hole at its center. The cylindrical part has 6 circular holes evenly distributed circumferentially, and the end face has 6 circular holes evenly distributed circumferentially around the central circular hole. The two sets of circular holes are vertically intersecting. Not only are there many sizes and high precision requirements, but the two sets of holes also have relative position requirements.

[0004] The traditional process first involves manually marking all 12 round holes by a fitter, then drilling the six evenly distributed round holes on the end face, and finally clamping the end face in a vise to complete the machining of the six round holes in the cylindrical section. This method not only makes the workpiece extremely prone to deformation, causing the drill bit to slip when drilling the round holes in the cylindrical section and easily damaging the end face when drilling the round holes in the end face, but also makes the operation difficult due to the reliance on the marked positions, making it hard to guarantee dimensional and positional accuracy, resulting in a very high workpiece scrap rate. In addition, after machining each hole, the position needs to be manually adjusted and re-clamped, making the process cumbersome and the processing efficiency extremely low.

[0005] Therefore, in order to address the above problems, it is urgent to design a positioning drilling fixture for thin-walled sleeve-type parts to achieve precise positioning and stable processing during the drilling process, solve the problem of deformation during thin-walled drilling, reduce the influence of human factors, and improve processing accuracy and production efficiency. Utility Model Content

[0006] This application provides a positioning and drilling device for thin-walled sleeves, which can solve the technical problems in the prior art such as material deformation and drill bit slippage when drilling thin-walled sleeves. The technical solution is as follows:

[0007] A positioning drilling device for a thin-walled sleeve, the thin-walled sleeve comprising a cylindrical portion and an end portion extending into the cylinder from one end of the cylindrical portion, the cylindrical portion having a plurality of first machined circular holes, and the end portion having a plurality of second machined circular holes, wherein the number of the first machined circular holes is an even number greater than 2, and the positioning drilling device for the thin-walled sleeve comprises:

[0008] A drill jig base includes a regular polyprism, the number of which is equal to the number of the first machined circular holes. One bottom surface of the regular polyprism has a receiving cavity for accommodating the thin-walled sleeve. The bottom of the receiving cavity has a threaded hole. Each side surface of the regular polyprism has a first guide hole at its center, and the multiple first guide holes on the multiple sides correspond one-to-one with the multiple first machined circular holes. The bottom of the receiving cavity has a second guide hole that corresponds one-to-one with the multiple second circular holes on the end face.

[0009] The pressure plate has a first through hole located at the center of the pressure plate, or a U-shaped groove extending from the edge of the pressure plate to the center of the pressure plate;

[0010] A fastening bolt passes through the pressure plate from the first through hole or the U-shaped groove and is screwed into the threaded hole of the drill jig base. The fastening bolt is used to fix the pressure plate and the drill jig base.

[0011] Optionally, the bottom of the receiving cavity has an annular groove for receiving the end face.

[0012] Optionally, the depth of the receiving cavity is greater than the height of the thin-walled sleeve, and the pressure plate has a first circular boss on the side facing the receiving cavity. The first circular boss can be inserted into the receiving cavity, and the diameter of the first circular boss is greater than the inner diameter of the cylindrical portion and smaller than the inner diameter of the receiving cavity.

[0013] Optionally, a second circular boss is also provided on the first circular boss, the second circular boss having the same central axis as the first circular boss, and the diameter of the second circular boss being smaller than the inner diameter of the cylindrical part.

[0014] Optionally, a guide sleeve is provided inside the first guide hole.

[0015] Optionally, the guide sleeve includes a sleeve and an outer flange disposed at one end of the sleeve, wherein the inner diameter of the sleeve is larger than the diameter of the drill bit used to process the first machined circular hole.

[0016] Optionally, the guide sleeve is made of GCr15 steel.

[0017] Optionally, the diameter of the second guide hole is larger than the diameter of the drill bit used to machine the second machined circular hole.

[0018] The beneficial effects of the technical solutions provided in this application include at least the following:

[0019] A positioning and drilling device for thin-walled sleeve components includes a drill jig, a pressure plate, and fastening bolts. Since the number of first machined circular holes in the thin-walled sleeve component is an even number greater than 2, the number of sides of the drill jig is also an even number greater than 2. That is, the drill jig can be a regular square prism, a regular hexagonal prism, etc. Thus, each side of the regular polygonal prism has a parallel side. A first guide hole is provided on each side, and the first guide hole corresponds to the first machined circular hole to be machined. When machining the first machined circular hole, one side of the drill jig, which holds the thin-walled sleeve component, is placed flat on the drilling machine, with the parallel side facing upwards. The first guide hole on this side is aligned with the drill bit and drilled to accurately machine the first machined circular hole. When machining the second machined circular hole, the pressure plate on the drill jig is oriented towards the worktable and fixed on the worktable. Then, the drill bit is aligned with the second machined circular hole on the machining end face of the second guide hole. Since the thin-walled sleeve to be processed is fixed in the drill jig, the first guide hole and the second guide hole can guide the drill bit, thereby avoiding the phenomenon that the thin-walled sleeve is difficult to position when drilling the cylindrical part, and is prone to scratching the outer surface of the thin-walled sleeve. The thin-walled sleeve positioning device of this application eliminates manual scribing and manual positioning, thus simplifying the processing steps and improving drilling efficiency.

[0020] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional schematic diagram of the thin-walled sleeve component provided in the embodiments of this application;

[0023] Figure 2 This is an exploded view of the thin-walled sleeve positioning drilling device provided in the embodiments of this application;

[0024] Figure 3 yes Figure 2 A schematic diagram of the combined state of the positioning and drilling device for thin-walled sleeve components;

[0025] Figure 4 This is a three-dimensional schematic diagram of the drill jig provided in the embodiments of this application;

[0026] Figure 5 This is a three-dimensional cross-sectional view of the pressure plate provided in the embodiment of this application.

[0027] Explanation of reference numerals in the attached figures

[0028] 1-Thin-walled sleeve; 101-Cylindrical part; 1011-First machined circular hole; 102-End face; 1021-Second machined circular hole; 2-Drill jig base; 201-Regular polygonal prism; 202-Threaded hole; 203-First guide hole; 204-Second guide hole; 205-Annular groove; 3-Pressure plate; 301-U-shaped groove; 302-First circular boss; 303-Second circular boss; 4-Fasting bolt; 5-Guide sleeve. Detailed Implementation

[0029] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0030] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the relative positions of the corresponding components in the direction of gravity when they are in use, and "inner" and "outer" refer to their relative positions to the contours of the corresponding components themselves. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements.

[0031] refer to Figure 1 The thin-walled sleeve 1 includes a cylindrical portion 101 and an end portion 102 located at one end of the cylindrical portion 101 and extending into the cylinder. The cylindrical portion 101 has a plurality of first machined circular holes 1011, and the end portion 102 has a plurality of second machined circular holes 1021. The number of the first machined circular holes 1011 is an even number greater than 2.

[0032] According to the embodiments of this application, refer to Figures 2 to 5 As shown, a positioning drilling device for a thin-walled sleeve 1 is provided, comprising: a drill jig 2, a pressure plate 3, and fastening bolts 4.

[0033] Among them, reference Figure 4 As shown, the drill jig base 2 includes a regular polyprism 201. The number of sides of the regular polyprism 201 is equal to the number of the first machined circular holes 1011. One bottom surface of the regular polyprism 201 has a receiving cavity for accommodating the thin-walled sleeve 1. The bottom of the receiving cavity has a threaded hole 202. Each side of the regular polyprism 201 has a first guide hole 203 in the middle. The multiple first guide holes 203 on multiple sides correspond one-to-one with the multiple first machined circular holes 1011. The bottom of the receiving cavity has a second guide hole 204 that corresponds one-to-one with the multiple second circular holes on the end face 102.

[0034] refer to Figure 2 and Figure 5 As shown, the pressure plate 3 has a first through hole located at the center of the pressure plate 3, or a U-shaped groove 301 extending from the edge of the pressure plate 3 to the center of the pressure plate 3.

[0035] The fastening bolt 4 passes through the pressure plate 3 from the first through hole or the U-shaped groove 301 and is screwed into the threaded hole 202 of the drill jig 2. The fastening bolt 4 is used to fix the pressure plate 3 and the drill jig 2.

[0036] In the above embodiment, when it is necessary to process the thin-walled sleeve 1, the thin-walled sleeve 1 with the unprocessed first processing round hole 1011 and the second processing round hole 1021 is first placed into the receiving cavity of the drill jig 2, so that the end face 102 of the thin-walled sleeve 1 contacts the bottom of the receiving cavity. The pressure plate 3 is then fastened onto the drill jig 2 with the thin-walled sleeve 1, and the locking bolt is inserted through the U-shaped groove 301 of the pressure plate 3 and screwed into the threaded hole 202 of the drill jig 2. Since the number of the first processing round holes 1011 of the thin-walled sleeve 1 is an even number greater than 2, the number of sides of the drill jig 2 is also an even number greater than 2. That is, the drill jig 2 can be a regular square prism, a regular hexagonal prism, etc. In this way, each side of the regular polygonal prism 201 has a side that is parallel to each other. A first guide hole 203 is provided on each side, and the first guide hole 203 corresponds to the first processing round hole 1011 to be processed. When machining the first machining hole 1011, one side of the drill jig 2, which holds the thin-walled sleeve 1, is placed flat on the drilling machine, with the parallel side facing upwards. The first guide hole 203 on this side is aligned with the drill bit and drilled to produce the first machining hole 1011. When machining the second machining hole 1021, the pressure plate 3 on the drill jig 2 is oriented towards the worktable and fixed on the worktable. Then, the drill bit is aligned with the second guide hole 204 to machine the second machining hole 1021 on the end face 102. Since the thin-walled sleeve 1 to be machined is fixed in the drill jig 2, the first guide hole 203 and the second guide hole 204 can guide the drill bit, thereby avoiding the problem of difficulty in positioning the thin-walled sleeve 1 when drilling the cylindrical part 101, which could easily scratch the outer surface of the thin-walled sleeve 1. The thin-walled sleeve positioning device of this application eliminates the need for manual scribing and manual positioning, thus simplifying the machining process and improving drilling efficiency.

[0037] According to the embodiments of this application, refer to Figure 4 As shown, the bottom of the receiving cavity has an annular groove 205 for accommodating the end face 102. With this design, the end face 102 of the thin-walled sleeve 1 can be inserted into the annular groove 205, which further improves the positioning accuracy and stability of the thin-walled sleeve 1 in the drill jig 2, thereby helping to improve the accuracy of machining the first machining hole 1011 and the second machining hole 1021.

[0038] According to the embodiments of this application, refer to Figure 5 As shown, the depth of the receiving cavity is greater than the height of the thin-walled sleeve 1. The pressure plate 3 has a first circular boss 302 on the side facing the receiving cavity. The first circular boss 302 can be inserted into the receiving cavity, and the diameter of the first circular boss 302 is greater than the inner diameter of the cylindrical portion 101 and smaller than the inner diameter of the receiving cavity. In the above embodiment, since the first circular boss 302 abuts against one end of the thin-walled sleeve 1, the pressure plate 3 can apply an axial clamping force to the thin-walled sleeve 1, thereby improving the reliability of fixing the thin-walled sleeve 1.

[0039] According to the embodiments of this application, refer to Figure 5 As shown, further, to further improve the clamping reliability of the thin-walled sleeve 1, a second circular boss 303 is also provided on the first circular boss 302. The second circular boss 303 has the same central axis as the first circular boss 302, and the diameter of the second circular boss 303 is smaller than the inner diameter of the cylindrical portion 101. The second circular boss 303 can contact the end face 102 of the thin-walled sleeve 1, or it can have a gap with the end face 102. By designing the second circular boss 303, inward deformation of the cylindrical portion 101 can be prevented when machining the first machined circular hole 1011, and inward deformation of the end face 102 can also be prevented when machining the second machined circular hole 1021.

[0040] According to the embodiments of this application, refer to Figure 2 As shown, after the drill jig 2 has been used for a period of time, the first guide hole 203 will be worn, resulting in an enlarged hole diameter. In order to improve the service life of the drill jig 2, a guide sleeve 5 can be provided in the first guide hole 203.

[0041] The guide sleeve 5 includes a sleeve and an outer flange disposed at one end of the sleeve. The inner diameter of the sleeve is larger than the diameter of the drill bit used to process the first machining hole 1011.

[0042] The guide sleeve 5 can be made of GCr15 steel, a high-carbon chromium bearing steel with a low alloy content and wide application. After quenching and low-temperature tempering, it has high hardness, uniform microstructure, good wear resistance, and high contact fatigue resistance. Its high hardness and rigidity allow it to withstand the strength required for machining, and it is relatively resistant to wear. Choosing GCr15 steel for the guide sleeve 5 can improve the service life of the positioning drilling device for the thin-walled sleeve 1.

[0043] According to the embodiments of this application, refer to Figure 2 As shown, the diameter of the second guide hole 204 is larger than the diameter of the drill bit used to process the second machining hole 1021.

[0044] The implementation principle of this application is explained below with reference to specific embodiments and processing methods. The thin-walled sleeve 1 has six first machined circular holes 1011, and the processing method is as follows:

[0045] 1. Place the thin-walled sleeve 1 to be processed with its opening facing upwards in the annular groove 205 of the drill jig base, so that it completely fits the inner cavity surface of the annular groove 205;

[0046] 2. Place the pressure plate 3 on the receiving cavity of the drill jig 2, and tighten the fastening bolt 4 by passing it through the U-shaped groove 301 through the pressure plate 3 and screwing it into the threaded hole 202 of the drill jig 2.

[0047] 3. Insert the six guide sleeves 5 into the first guide hole 203 of the drill jig base in sequence, and install them securely;

[0048] 4. Place the drilling fixture flat on the drilling machine worktable with the bottom surface facing up. At this time, the head of the set bolt should face the worktable (a pad can be used). Adjust the position so that the drilling guide hole at the bottom of the drilling jig base is aligned with the drill bit. Then, complete the machining of the multiple second machining round holes 1021 on the end face of the thin-walled sleeve 1 in sequence.

[0049] 5. Position the side of the regular hexagonal prism corresponding to the first machined circular hole 1011 of the thin-walled sleeve 1 to be machined horizontally upward, so that the guide sleeve 5 is directly opposite the drill bit, and then use flat-nose pliers to fix and clamp it.

[0050] 6. Start the drilling machine and complete the machining of the first machining hole 1011 on the thin-walled sleeve 1 along the inner hole of the guide sleeve 5; similarly, loosen the flat-jaw vise, adjust the position of the drilling device, and complete the machining of the remaining 5 first machining holes 1011 in sequence.

[0051] 7. After the first machined round hole 1011 and the second machined round hole 1021 of the thin-walled sleeve part 1 are both machined, loosen the fastening bolt 4, remove the pressure plate 3, and take out the completed thin-walled sleeve part 1.

[0052] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0053] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0054] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A thin-walled sleeve part positioning and drilling device, the thin-walled sleeve part (1) comprising a cylindrical portion (101) and an end face portion (102) extending inwardly from one end of the cylindrical portion (101), the cylindrical portion (101) having a plurality of first machined circular holes (1011), and the end face portion (102) having a plurality of second machined circular holes (1021), wherein, The number of the first machining round holes (1011) is an even number greater than 2, and the thin-walled sleeve part positioning and drilling device comprises: a drill jig base (2) comprising a regular polygonal prism (201), the number of sides of the regular polygonal prism (201) is equal to the number of the first machining round holes (1011), one bottom surface of the regular polygonal prism (201) has a receiving cavity for accommodating the thin-walled sleeve part (1), the cavity bottom of the receiving cavity has a threaded hole (202), the middle part of each side of the regular polygonal prism (201) has a first guide hole (203), the first guide holes (203) of the plurality of sides one-to-one correspond to the first machining round holes (1011); the cavity bottom of the receiving cavity has a second guide hole (204) corresponding to the second round holes of the end face part (102) one-to-one; a pressing plate (3) having a first through hole located at the center of the pressing plate (3), or a U-shaped groove (301) extending from the edge of the pressing plate (3) to the center of the pressing plate (3); and a fastening bolt (4) passing through the pressing plate (3) from the first through hole or the U-shaped groove (301) and being screwed into the threaded hole (202) of the drill jig base (2), the fastening bolt (4) being used for fixing the pressing plate (3) and the drill jig base (2).

2. A thin-walled sleeve part positioning and drilling apparatus according to claim 1, characterized in that, The bottom of the receiving cavity has an annular groove (205) for accommodating the end face part (102).

3. The thin-walled sleeve part positioning and drilling apparatus according to claim 1, characterized in that, The depth of the receiving cavity is greater than the height of the thin-walled sleeve part (1), one side of the pressing plate (3) facing the receiving cavity has a first circular boss (302), the first circular boss (302) can be inserted into the receiving cavity, and the diameter of the first circular boss (302) is greater than the inner diameter of the cylindrical part (101) and less than the inner diameter of the receiving cavity.

4. A thin-walled sleeve part positioning and drilling apparatus according to claim 3, characterized in that A second circular boss (303) is further arranged on the first circular boss (302), the second circular boss (303) has the same central axis as the first circular boss (302), and the diameter of the second circular boss (303) is less than the inner diameter of the cylindrical part (101).

5. The thin-walled sleeve part positioning and drilling apparatus according to claim 1, characterized in that, A guide sleeve (5) is arranged in the first guide hole (203).

6. A thin-walled sleeve part positioning and drilling apparatus according to claim 5, characterized in that The guide sleeve (5) comprises a sleeve and an outer flange arranged at one end of the sleeve, and the inner diameter of the sleeve is greater than the diameter of a drill bit used for machining the first machining round holes (1011).

7. A thin-walled sleeve member positioning and drilling apparatus according to claim 5 or 6, characterised in that, The guide sleeve (5) is made of GCr15 steel.

8. The thin-walled sleeve part positioning and drilling apparatus according to claim 1, characterized in that, The diameter of the second guide hole (204) is greater than the diameter of a drill bit used for machining the second machining round holes (1021).

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