Device and method for machining boss on inner side of sighting frame

Abstract

The invention provides a machining device and method for a boss on the inner side of a sighting frame, and belongs to the technical field of sighting frame machining. The machining device comprises a cutter bar and a cutter body device, the cutter bar is of a cylinder structure, and the size of the axis of the cutter bar is 0.02-0.03 mm smaller than the size of the inner diameter of a machining inner hole of a boss on the inner side of the sighting frame to be machined. The tool body device comprises a tool rest table and two tool bits, the tool rest table is of a boss structure, and a mounting hole with the same size as the tool bar is formed in the center of the tool rest table; one end of the cutter bar is connected with the milling machine spindle, the other end of the cutter bar is arranged in the mounting hole, a fixing hole is formed in the side wall of the mounting hole, and the cutter bar is connected with the cutter rest table through a screw in threaded connection with the fixing hole; mounting grooves are formed in the two sides of the center of the tool rest table, a fixing groove matched with each mounting groove is formed beside the corresponding mounting groove, a clamping hole is formed between each fixing groove and the corresponding mounting groove, and the jackscrews are connected into the clamping holes in a threaded mode to fix the tool bits arranged in the mounting grooves. The machining device is matched with a common milling machine to complete machining of a boss on the inner side of the sighting frame.

Description

Technical Field

[0001] The invention belongs to the technical field of aiming frame processing, and in particular relates to an aiming frame inner side boss processing device and method. Background Art

[0002] As we all know, workpieces with inner bosses have certain processing difficulties during the machining process. The difficulty lies in the small machining space and complicated machining process.

[0003] With regard to the boss structure on the inner side of the sighting frame product, the existing process methods cannot complete the processing in various machine tools, which poses a technical problem for mechanical processing companies.

[0004] Therefore, a technical solution is urgently needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for processing the inner boss of an aiming frame, so as to solve the problem that such workpieces cannot be processed in the prior art, and for enterprises with certain basic processing equipment and processing capabilities, the processing accuracy of the workpieces can meet the technical requirements without increasing the costs and burdens of the enterprises.

[0006] A device for processing the inner boss of a sighting frame, comprising a tool bar and a tool body device; The tool bar is a cylindrical structure, and the axis size is 0.02-0.03mm smaller than the inner diameter size of the inner hole of the inner boss of the aiming frame to be processed; The tool body device comprises a tool holder and two tool heads, wherein the tool holder is a boss structure, and a mounting hole having the same size as the tool rod is provided at the center of the tool holder; One end of the tool bar is connected to the spindle of the milling machine, and the other end is placed in the mounting hole. A fixing hole is opened on the side wall of the mounting hole, and a screw for fixing the tool bar is threadedly connected in the fixing hole; Installation grooves are provided on both sides of the center position of the tool holder, and a fixing groove matching with the installation groove is provided next to each installation groove. A clamping hole is provided between the fixing groove and the installation groove, and a top screw is threadedly connected in the clamping hole to fix the tool head placed in the installation groove.

[0007] Furthermore, the cutter head is made of high-speed steel and is ground by a grinding wheel. The cutter head includes a connecting part and a working part. The connecting part is a rectangular parallelepiped, and the upper top surface of the working part is an inclined isosceles trapezoid. The side surface where the long side of the isosceles trapezoid is located and the side surface where the short side is located are respectively flush with the two opposite side surfaces of the rectangular parallelepiped. The side surfaces where the two oblique sides are located are inclined inward from top to bottom, and the upper part of the side surface where the long side is located is recessed inward to form a cutting tip.

[0008] A method for processing the inner boss of a sight frame, using the aforementioned inner boss processing device of the sight frame, comprises the following processing steps: Step 1: Install the two cutter heads in the installation grooves of the tool holder respectively, adjust the spacing between the two cutter heads so that the distance between the tool tips is the same as the size of the boss to be processed, and the distance between the two cutter heads and the installation holes is equal, fix the two cutter heads respectively by the top screw, and complete the assembly of the cutter body device; Step 2: Fix the top of the tool bar on the spindle of the milling machine; Step 3: Put the aiming frame to be processed on the tool bar through the processed inner hole, adjust it to a proper position, fix the aiming frame to be processed with a vise and clamp it; Step 4: Install the cutter body device at the bottom end of the cutter bar and fix it with screws; Step 5: Start processing the inner boss of the aiming frame, set the number of revolutions of the milling machine and start the milling machine, and process according to the actual size requirements; Step 6. After the processing is completed, loosen the screws to remove the cutter body device, loosen the jaws, remove the workpiece, and turn off the milling machine after meeting the processing requirements.

[0009] The present invention can bring the following beneficial effects: The device and method for processing the inner boss of an aiming frame provided by the present invention are used in conjunction with a milling machine. According to the processing steps provided by the method, a workpiece that meets the technical requirements can be produced, thereby solving the technical problem that the current conventional processing equipment cannot process. The entire device has a simple structure, low production cost, and greatly reduces the processing difficulty. It enables ordinary mechanical processing enterprises with certain basic processing equipment and capabilities to have the ability to process the inner boss of the aiming frame, which is particularly suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0011] Figure 1 It is a structural schematic diagram of the present invention;

[0012] Figure 2 It is a structural schematic diagram of the knife bar of the present invention;

[0013] Figure 3 It is a schematic diagram of the structure of the cutter body device of the present invention;

[0014] Figure 4 It is a three-view drawing of the tool rest table structure of the present invention;

[0015] Figure 5 It is a three-view drawing of the cutter head structure of the present invention;

[0016] Figure 6 It is a structural schematic diagram of the aiming frame workpiece to be processed;

[0017] Figure 7 The figure is a schematic diagram of the state of processing the inner side boss of the aiming frame according to the present invention.

[0018] In the figure, 1-tool bar, 2-tool body device, 3-inner boss of aiming frame, 30-processed inner hole, 100-milling machine spindle, 201-tool holder, 202-tool head, 2001-mounting hole, 2002-mounting groove, 2003-fixing groove, 2004-screw, 2005-top screw, 2006-fixing hole, 2007-clamping hole, 2021-connecting part, 2022-working part. DETAILED DESCRIPTION

[0019] like Figures 1 to 7 As shown, the inner side boss processing device of the aiming frame includes a tool bar 1 and a tool body device 2; The tool bar 1 is a cylindrical structure, and the axis size is 0.02-0.03mm smaller than the inner diameter size of the inner hole 30 of the inner boss 3 of the aiming frame to be processed; The tool body device 2 includes a tool holder 201 and two tool heads 202, wherein the tool holder 201 is a boss structure, and a mounting hole 201 having the same size as the tool rod 1 is provided at the center of the tool holder 201; One end of the tool bar 1 is connected to the milling machine spindle 100, and the other end is placed in the mounting hole 2001. A fixing hole 2006 is opened on the side wall of the mounting hole 2001. The tool bar 1 is fixed to the tool holder 201 by a screw 2004 threadedly connected to the fixing hole 2006. The tool holder 201 has installation grooves 2002 on both sides of the center, and each installation groove 2002 has a matching fixing groove 2003 next to it. A clamping hole 2007 is provided between the fixing groove 2003 and the installation groove 2002, and a top screw 2005 is threadedly connected in the clamping hole 2007 to fix the tool head 202 placed in the installation groove 2002.

[0020] Furthermore, the cutter head 202 is made of high-speed steel and is ground by a grinding wheel. The cutter head 202 includes a connecting portion 2021 and a working portion 2022. The connecting portion 2021 is a rectangular parallelepiped, and the upper top surface of the working portion 2022 is an inclined isosceles trapezoid. The side surfaces where the long sides of the isosceles trapezoid are located and the side surfaces where the short sides are located are respectively flush with the two opposite side surfaces of the rectangular parallelepiped. The side surfaces where the two oblique sides are located are inclined inward from top to bottom, and the upper portion of the side surfaces where the long sides are located are recessed inward to form a cutting tip.

[0021] A method for processing the inner boss of a sighting frame includes the following processing steps: Step 1: Install the two cutter heads 202 in the mounting grooves 2002 of the tool holder 201, adjust the spacing between the two cutter heads 202 so that the distance between the tool tips is the same as the size of the boss to be processed, and the distance between the two cutter heads 202 and the mounting holes 2001 is equal, and fix the two cutter heads 202 respectively by the top screws 2005 to complete the assembly of the cutter body device 2; Step 2: Fix the top end of the tool bar 1 on the milling machine spindle 100; Step 3, the aiming frame to be processed is sleeved on the tool bar 1 through the processed inner hole 30, adjusted to an appropriate position, and the aiming frame to be processed is fixed and clamped with a vise; Step 4: Install the knife body device 2 at the bottom end of the knife rod 1 and fix it with screws 2004; Step 5: Start processing the inner boss 3 of the aiming frame, set the number of revolutions of the milling machine and start the milling machine, and process according to the actual size requirements; Step 6: After the processing is completed, loosen the screw 2004 to remove the cutter body device 2, loosen the jaws, remove the workpiece, and turn off the milling machine after the processing requirements are met.

[0022] It should be noted that a trial processing process can be added before proceeding to step five to ensure that the dimensional accuracy of the workpiece meets the processing requirements during formal processing and improve processing efficiency.

[0023] The present invention has a simple structure and strong practicality. The present invention is used in conjunction with a milling machine, and can adjust the distance between the two cutter heads 202 at any time according to the outer diameter of the inner boss 3 of the aiming frame of different sizes, so that the inner boss 3 of the aiming frame of different sizes can be processed. The present invention enables ordinary mechanical processing enterprises with certain basic processing equipment and capabilities to have the processing capability of the inner boss 3 of the aiming frame. In addition, the present invention can also improve the processing accuracy and processing efficiency of the product, and is particularly suitable for mass production.

Claims

1. A device for processing the inner boss of a sighting frame, characterized in that: It comprises a knife bar (1) and a knife body device (2); The tool bar (1) is a cylindrical structure, and the axis size is 0.02-0.03 mm smaller than the inner diameter size of the processed inner hole (30) of the inner side boss (3) of the aiming frame to be processed; The tool body device (2) comprises a tool holder platform (201) and two tool heads (202), wherein the tool holder platform (201) is a boss structure, and a mounting hole (2001) having the same size as the tool rod (1) is provided at the center of the tool holder platform (201); One end of the tool bar (1) is connected to the milling machine spindle (100), and the other end is placed in the mounting hole (2001); a fixing hole (2006) is provided on the side wall of the mounting hole (2001); a screw (2004) for fixing the tool bar (1) is connected to the inner thread of the fixing hole (2006); The tool holder platform (201) is provided with mounting grooves (2002) on both sides of the center position, and each mounting groove (2002) is provided with a matching fixing groove (2003) on its side, and a clamping hole (2007) is provided between the fixing groove (2003) and the mounting groove (2002), and a top screw (2005) is threadedly connected in the clamping hole (2007) to fix the tool head (202) placed in the mounting groove (2002).

2. The device for processing the inner boss of the sight frame according to claim 1, characterized in that: The cutter head (202) is made of high-speed steel and is ground by a grinding wheel. The cutter head (202) comprises a connecting portion (2021) and an operating portion (2022). The connecting portion (2021) is a rectangular parallelepiped. The upper top surface of the operating portion (2022) is an inclined isosceles trapezoid. The side surface where the long side of the isosceles trapezoid is located and the side surface where the short side is located are respectively flush with the two opposite side surfaces of the rectangular parallelepiped. The side surfaces where the two oblique sides are located are inclined inward from top to bottom, and the upper part of the side surface where the long side is located is concave inward to form a cutter tip.

3. A method for machining an inner boss of a sight frame, using the inner boss machining device of the sight frame as claimed in claim 1, characterized in that: The processing steps include: Step 1: install the two cutter heads (202) in the installation grooves (2002) of the tool holder (201), adjust the spacing between the two cutter heads (202) so that the distance between the tool tips is the same as the size of the boss to be processed, and the distance between the two cutter heads (202) and the installation holes (2001) is equal, and fix the two cutter heads (202) respectively by means of the top screws (2005), thereby completing the assembly of the cutter body device (2); Step 2: fix the top end of the tool bar (1) on the spindle (100) of the milling machine; Step 3: The aiming frame to be processed is sleeved on the tool bar (1) through the processed inner hole (30), adjusted to an appropriate position, and the aiming frame to be processed is fixed and clamped with a vise; Step 4: Install the knife body device (2) on the bottom end of the knife rod (1) and fix it with screws (2004); Step 5: Start processing the inner boss (3) of the aiming frame, set the number of revolutions of the milling machine and start the milling machine, and process according to the actual size requirements; Step 6: After the processing is completed, loosen the screw (2004), remove the cutter body device (2), loosen the jaws, remove the workpiece, and turn off the milling machine after the processing requirements are met.

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