Internal thread machining device

Abstract

The embodiment of the application discloses a female thread processing device, which comprises a fastening connecting plate, a first connecting hole is formed in the middle of the fastening connecting plate and is used for being arranged in a mounting groove of a workbench; a base plate, a second connecting hole is formed in the base plate, when the second connecting hole corresponds to the first connecting hole, the base plate and the fastening connecting plate are connected through a connecting piece; the base plate is provided with a plurality of positioning holes, the plurality of positioning holes are arranged according to bosses of a part to be processed, and after adjacent two positioning holes are arranged with a positioning piece, the two positioning holes jointly clamp one boss of the part to be processed; a positioning seat is arranged in a space surrounded by the plurality of positioning holes, and a convex part that is matched with a sealing groove of the part to be processed is arranged at the top of the positioning seat; and a tap is used for processing the female thread of the part to be processed. The processing efficiency and forming quality of the part are improved.

Description

Technical Field

[0001] This invention relates to the field of machining, and more particularly to an internal thread machining apparatus. Background Technology

[0002] The base of a certain product requires a fitter to machine an M12×1 internal thread in its center. The requirement is that the tap must not scratch the sealing chamfer below the relief groove on the bottom of the part during threading. Because the base is circular with three bosses, clamping and alignment are cumbersome. Furthermore, due to the process requirement that the tap must not scratch the sealing chamfer below the relief groove, manual machining is the only option. Repeatedly measuring the tap's machining length during tapping results in low efficiency and significant tap wear. This part severely impacts the overall machining efficiency and quality of the workshop.

[0003] There is currently no effective solution to the problem of difficulty in machining internal threads in existing technologies. Summary of the Invention

[0004] To solve the above problems, the present invention provides an internal thread processing device. After positioning the part, a positioning seat is installed in the inner hole at the bottom of the part to prevent the lead screw from scratching the chamfer of the sealing groove, thereby solving the problems of difficult part positioning and difficult tapping in the prior art.

[0005] To achieve the above objectives, the present invention provides an internal thread processing device, comprising: an internal thread processing device, characterized in that it includes: a fastening connecting plate, wherein a first connecting hole is formed in the middle of the fastening connecting plate for mounting in a worktable; a base plate, wherein a second connecting hole is formed, and when the second connecting hole corresponds to the first connecting hole, the base plate is connected to the fastening connecting plate by a connector; the base plate has a plurality of positioning holes, wherein the plurality of positioning holes are arranged according to the boss of the part to be processed, and two adjacent positioning holes are fitted with positioning components to jointly clamp one boss of the part to be processed; a positioning seat, wherein the positioning seat is disposed in the space enclosed by the plurality of positioning holes, and a protrusion on the top is adapted to the sealing groove of the part to be processed; and a tap for processing the internal thread of the part to be processed.

[0006] Alternatively, there may be two fastening connecting plates, which are located in different mounting slots on the workbench.

[0007] Alternatively, the substrate may have two second connection holes, which are located near opposite sides of the substrate.

[0008] Optionally, both the first connecting hole and the second connecting hole are threaded holes; the connecting element is a fastening screw.

[0009] Further optionally, the positioning seat includes a main body and a protrusion on the top of the main body; the diameter of the main body is smaller than the minimum process-set diameter of the bottom inner hole of the part to be processed; the height of the main body is smaller than the minimum process-set diameter of the bottom inner hole of the part to be processed; the total height of the main body and the protrusion is greater than the maximum process-set value of the sum of the depth of the bottom inner hole of the part to be processed and the depth of the sealing groove.

[0010] Optionally, the parallelism between the top and bottom surfaces of the main body is less than 0.01 mm.

[0011] Alternatively, the positioning element is a pin, which protrudes from the substrate when inserted into the positioning hole.

[0012] Alternatively, the diameter of the pin may be the same as the diameter of the boss on the part to be processed.

[0013] Alternatively, the positioning holes are provided in six pairs, with each pair of positioning holes corresponding to one of the bosses of each part to be processed.

[0014] Alternatively, the tap is fixed to the lathe drill chuck and machined from the top of the workpiece.

[0015] The above technical solution has the following beneficial effects: by fastening the detachable connection between the connecting plate and the base plate, and installing the positioning component on the base plate, the clamping and positioning of the part is completed; by inserting the positioning seat in the middle into the bottom inner hole of the part to be processed, the sealing chamfer is avoided during tap processing, the shortcomings of manual processing are eliminated, and the efficiency and forming quality of part processing are improved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 It is a sectional view of a part provided in the prior art;

[0018] Figure 2 This is an enlarged structural schematic diagram of a part provided in the prior art;

[0019] Figure 3 This is a top view of a part provided in the prior art;

[0020] Figure 4This is a schematic diagram of the internal thread processing device provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the fastening connection plate provided in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the substrate structure provided in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the positioning seat provided in an embodiment of the present invention.

[0024] Reference numerals: 1-Drill chuck; 2-Tap; 3-Workpiece to be machined; 301-Bottom inner hole; 302-Internal threaded hole; 303-Relief groove; 304-Sealing groove; 305-Boss; 4-Positioning seat; 401-Main body; 402-Protrusion; 5-Positioning component; 6-Connecting component; 7-Base plate; 701-Second connecting hole; 702-Positioning hole; 8-Fastening connecting plate; 801-First connecting hole; 9-Worktable. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figure 1 As shown, the middle part of the part includes an upper internal threaded hole 302 and a lower bottom internal hole 301, and a sealing groove 304 is provided between the internal threaded hole and the bottom internal hole. Figure 2 yes Figure 1 An enlarged view of part I, as shown Figure 2 As shown, the bottom of the internal threaded hole is provided with a relief groove 303, and the lower side of the relief groove 303 is provided with a sealing chamfer. During machining, the internal threaded hole needs to be threaded, and the tap must not scratch the sealing chamfer on the side of the sealing groove 304 below the relief groove 303. Therefore, it can only be machined manually, which is time-consuming and labor-intensive, severely affecting machining efficiency and causing significant tap wear. Furthermore, as... Figure 3 As shown, the outer side of the part is also provided with multiple bosses 305. There are three bosses 305 in this schematic part. The middle part of the part is circular and the bosses are also circular, which makes it difficult to clamp and align, and also affects the processing efficiency.

[0027] To address the difficulty in machining internal threads of parts in existing technologies, embodiments of the present invention provide an internal thread machining apparatus. Figure 4 This is a schematic diagram of the internal thread processing device provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the device includes: a fastening connecting plate 8, with a first connecting hole 801 in the middle for mounting in the workbench 9; a base plate 7, with a second connecting hole 701, which, when corresponding to the first connecting hole 801, connects the base plate 7 to the fastening connecting plate 8 via a connector 6; the base plate 7 has multiple positioning holes 702, which are arranged according to the boss of the workpiece 3 to be processed, and two adjacent positioning holes 702, after mounting a positioning component 5, jointly mount one boss of the workpiece 3 to be processed; a positioning seat 4, which is located in the space enclosed by the multiple positioning holes 702, and has a protrusion on the top that matches the sealing groove of the workpiece 3 to be processed; and a tap 2 for machining the internal thread of the workpiece 3 to be processed.

[0028] Figure 5 This is a structural schematic diagram of the fastening connection plate provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the fastening connecting plate 8 is rectangular in shape, and its thickness and width are smaller than the corresponding dimensions of the T-slot of the worktable 9. Therefore, the fastening connecting plate 8 can be installed in the T-slot of the worktable 9. A first connecting hole 801 is provided in the middle of the fastening connecting plate 8. When the fastening connecting plate 8 is installed in the T-slot of the worktable 9, the first connecting hole 801 corresponds to the opening of the T-slot.

[0029] There can be multiple fastening connection plates 8, and the appropriate number of fastening connection plates 8 can be selected according to different models of parts.

[0030] Figure 6 This is a schematic diagram of the substrate structure provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the substrate 7 is rectangular in shape, and its surface has a second connecting hole 701. The second connecting hole 701 is correspondingly arranged with the fastening connecting plate 8. When the second connecting hole 701 moves to correspond with the first connecting hole 801, the substrate 7 can be fixed on the worktable 9 by screwing in the connector 6. In addition, the surface of the substrate 7 also has a plurality of positioning holes 702. When positioning parts, a positioning member 5 is first installed in each positioning hole 702. The positioning member 5 protrudes from the surface of the substrate 7. The space between the positioning members 5 in two adjacent positioning holes 702 is used to clamp one of the bosses of the part 3 to be processed. Depending on the different parts with different numbers and positions of bosses, a corresponding number and position of positioning holes 702 are opened.

[0031] Figure 7 This is a schematic diagram of the positioning seat provided in an embodiment of the present invention, as shown below. Figure 7As shown, the top of the positioning seat 4 has a protrusion 402 that matches the sealing groove of the workpiece 3 to be processed. The positioning seat 4 is located in the space surrounded by multiple positioning holes 702. When the main body of the positioning seat 4 is inserted into the bottom inner hole of the workpiece 3 to be processed, the protrusion 402 is inserted into the sealing groove of the workpiece 3 to protect the sealing chamfer. At this time, tap 2 can be used to tap from the top without damaging the sealing chamfer.

[0032] like Figure 4 As shown, the method of using this device is as follows:

[0033] 1. Secure the base plate 7 and the fastening plate 8 to the working platform using the connector 6.

[0034] 2. Install the positioning components 5 into the multiple positioning holes 702 of the substrate 7 respectively.

[0035] 3. Insert the positioning seat 4 into the space enclosed by multiple positioning components 5 to complete the positioning.

[0036] 4. Insert the bottom inner hole of the sword to be processed into the positioning seat 4, and each external boss is clamped and positioned by two adjacent positioning parts 5.

[0037] 5. The internal thread of the workpiece 3 is completed by controlling the tap 2 through the drilling machine.

[0038] As an optional implementation, there are two fastening connecting plates 8, which are disposed in different mounting slots of the workbench 9.

[0039] like Figure 4 As shown, there are two fastening connection plates 8, which are located in different T-slots of the worktable 9.

[0040] As an optional implementation, the substrate 7 has two second connection holes 701, which are respectively located near opposite sides of the substrate 7.

[0041] like Figure 6 As shown, two second connection holes 701 are formed on the substrate 7. The two second connection holes 701 are arranged opposite each other and are located on both sides close to the substrate 7. The distance between the centers of the two second connection holes 701 is the same as the distance between the centers of the first connection holes 801 of the two fastening connection plates 8.

[0042] As an optional implementation, both the first connecting hole 801 and the second connecting hole 701 are threaded holes; the connector 6 is a fastening screw.

[0043] To improve the loading and unloading speed, both the first connecting hole 801 and the second connecting hole 701 in this embodiment are screw holes, and the detachable connection between the base plate 7 and the fastening connecting plate 8 is completed by fastening screws.

[0044] As an optional implementation, the positioning seat 4 includes a main body 401 and a protrusion 402 on the top of the main body 401; the diameter of the main body 401 is smaller than the minimum process-set diameter of the bottom inner hole of the part to be processed 3; the height of the main body 401 is smaller than the minimum process-set diameter of the bottom inner hole of the part to be processed 3; the total height of the main body 401 and the protrusion 402 is greater than the maximum process-set value of the sum of the depth of the bottom inner hole of the part to be processed 3 and the depth of the sealing groove, but it cannot affect the thread processing of the internal thread groove.

[0045] like Figure 4 As shown, the main body 401 of the positioning seat 4 needs to be inserted into the bottom inner hole of the workpiece 3 to be processed, while the protrusion 402 needs to fill the sealing groove of the workpiece. Therefore, the diameter of the main body 401 needs to be smaller than the minimum process-set diameter of the bottom inner hole of the workpiece 3 to be processed. The height of the main body 401 is smaller than the minimum process-set diameter of the bottom inner hole of the workpiece 3 to be processed. The total height of the main body 401 and the protrusion 402 is greater than the maximum process-set value of the sum of the depth of the bottom inner hole of the workpiece 3 to be processed and the depth of the sealing groove.

[0046] As an optional implementation, the parallelism between the top and bottom surfaces of the main body 401 is less than 0.01 mm.

[0047] To improve assembly accuracy, the upper and lower surfaces of the main body 401 need to be precision machined by grinding to ensure that the parallelism of the upper and lower surfaces is less than 0.01mm.

[0048] As an optional implementation, the positioning element 5 is a pin, which protrudes from the base plate 7 when it is inserted into the positioning hole 702.

[0049] The positioning element 5 is a pin. The length of the pin should be greater than the depth of the positioning hole 702. This allows the pin to protrude from the top surface of the substrate 7 when it is in place, thereby clamping the boss of the part 3 to be processed.

[0050] As an optional implementation, the diameter of the pin is the same as the diameter of the boss on the part 3 to be processed.

[0051] As an optional implementation, the positioning holes 702 are provided in six pairs, with each pair of positioning holes 702 corresponding to one of the bosses of each of the parts to be processed 3.

[0052] like Figure 6As shown, there are six positioning holes 702, with each pair of positioning holes 702 forming a group. The three groups of positioning holes 702 are arranged in a triangular pattern, and the two positioning holes 702 in each group are used to clamp one of the bosses of the workpiece 3 to be processed.

[0053] As an alternative implementation, the tap 2 is fixed to the lathe drill chuck 1 and is machined from the top of the workpiece 3.

[0054] like Figure 4 As shown, one end of the tap 2 is mounted on the lathe via a chuck, allowing thread machining to begin from the top of the workpiece 3, thus avoiding various problems that occur during manual machining.

[0055] The above technical solution has the following beneficial effects: by fastening the detachable connection between the connecting plate and the base plate, and installing the positioning component on the base plate, the clamping and positioning of the part is completed; by inserting the positioning seat in the middle into the bottom inner hole of the part to be processed, the sealing chamfer is avoided during tap processing, the shortcomings of manual processing are eliminated, and the efficiency and forming quality of part processing are improved.

[0056] The above-described specific embodiments of the invention further illustrate the purpose, technical solution, and beneficial effects of the invention. It should be understood that the above content is only for specific embodiments of the invention and is not intended to limit the scope of protection of the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. An internal thread machining device, characterized in that, include: A fastening connecting plate, wherein a first connecting hole is provided in the middle of the fastening connecting plate for mounting the workbench in the mounting slot; The substrate has a second connecting hole. When the second connecting hole corresponds to the first connecting hole, the substrate is connected to the fastening connecting plate through a connector. The substrate has multiple positioning holes. The multiple positioning holes are set according to the boss of the part to be processed. After two adjacent positioning holes are equipped with positioning components, they jointly clamp one boss of the part to be processed. A positioning seat is disposed in the space enclosed by the plurality of positioning holes, and has a protrusion on its top that is adapted to the sealing groove of the part to be processed; the positioning seat includes a main body and a protrusion on the top of the main body; the diameter of the main body is smaller than the minimum process-defined diameter of the bottom inner hole of the part to be processed; the total height of the main body and the protrusion is greater than the maximum process-defined value of the sum of the depth of the bottom inner hole of the part to be processed and the depth of the sealing groove; wherein, the part to be processed includes an internal threaded hole and a bottom inner hole, and the sealing groove is disposed between the internal threaded hole and the bottom inner hole; A tap is used to machine the internal threads of the part to be machined.

2. The internal thread processing device according to claim 1, characterized in that: There are two fastening connection plates, which are located in different mounting slots on the workbench.

3. The internal thread processing device according to claim 2, characterized in that: The substrate has two second connection holes, which are located near opposite sides of the substrate.

4. The internal thread processing device according to claim 3, characterized in that: Both the first connecting hole and the second connecting hole are threaded holes; The connecting component is a fastening screw.

5. The internal thread processing device according to claim 1, characterized in that: The parallelism between the top and bottom surfaces of the main body is less than 0.01 mm.

6. The internal thread processing device according to claim 1, characterized in that: The positioning element is a pin, and when the pin is inserted into the positioning hole, its top protrudes from the substrate.

7. The internal thread processing device according to claim 6, characterized in that: The diameter of the pin is the same as the diameter of the boss on the part to be processed.

8. The internal thread processing device according to claim 1, characterized in that: The positioning holes are provided in six parts, and each pair of positioning holes is provided in a group corresponding to one of the bosses of each part to be processed.

9. The internal thread processing device according to claim 1, characterized in that: The tap is fixed to the lathe drill chuck and is used for machining from the top of the part to be machined.

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