Device for removing inside burrs of intersecting holes based on long-shaft cam driver

Abstract

This invention provides a device for removing burrs from the inner side of intersecting holes using a long-tipped wedge-driven cutting tool, belonging to the field of automotive hinge burr removal technology. It includes a pre-set burr removal mechanism comprising a first sliding member, a floating cutting tool, and a second sliding member. This device, based on a long-tipped wedge-driven cutting tool, pre-positions the floating scraper within hole one, opposite to hole two, before burr formation. After burr formation, the scraper moves sequentially to both sides to scrape away the burrs on the corresponding sides, achieving thorough and effective burr removal. Simultaneously, the first sliding member controls the left-right movement of the floating cutting tool, and the wedge-shaped fit between the second sliding member and the floating cutting tool provides sufficient processing space before hole two is processed. After hole two is processed, the burrs are effectively removed by the left-right sliding of the first sliding member. This structure is simple, easy to assemble and operate, and can achieve reliable and efficient burr removal even in space-constrained environments.

Description

Technical Field

[0001] This invention relates to the field of burr removal technology for automotive hinges, specifically a device for removing burrs on the inner side of intersecting holes based on a long-tipped wedge-driven cutting tool. Background Technology

[0002] The fixing plate of an automotive hinge typically has set screw holes on the radial surface of the pin hole for installing set screws to lock the pin in place. In actual manufacturing, the pin hole is usually machined first, followed by the set screw holes. When the set screw holes penetrate the pin hole, due to the hollow structure inside the pin hole, the plastic flow and tearing of material generated during the machining of the set screw holes will roll into the pin hole, forming burrs at the intersection of the two holes. These burrs, located on the inner side of the intersecting holes, not only affect the smooth assembly and disassembly of the pin but also easily cause chipping during subsequent use, thus affecting product quality. Therefore, they need to be removed.

[0003] Because the diameter of the pin hole is usually small and the burrs are located inside the intersecting holes, the working space is relatively limited. Existing technologies typically employ simpler methods for deburring. For example, a pin with a diameter matching the pin hole is inserted axially into the pin hole, and the burrs are removed by pressing; or a scraping structure is installed on the pin, and the burrs are scraped off by moving axially along the pin hole. These methods are simple in structure, easy to operate, and convenient for removing burrs from the inside of intersecting holes within a limited space.

[0004] However, during the aforementioned deburring process, because the location of the set screw hole creates a material void area on one side of the pin hole, lacking support from the opposing solid material, when the pin or scraper acts axially on the burr, the burr near the insertion end is prone to elastic deformation or roll-up under axial force, being squeezed into the set screw hole and not effectively removed. Thus, during subsequent set screw installation, the burr may be re-carried into the pin hole by the set screw, causing jamming during pin assembly or disassembly, and resulting in chip shedding and unstable product quality. Therefore, how to effectively remove burrs formed inside intersecting holes within the available space has become a pressing technical problem to be solved. Summary of the Invention

[0005] This invention provides a device for removing burrs from the inner side of intersecting holes using a long-tipped wedge-driven cutting tool. The device includes a positioning and fixing mechanism and a pre-setting burr removal mechanism. The positioning and fixing mechanism is used to fix the workpiece, which has two interconnected holes, Hole 1 and Hole 2. The pre-setting burr removal mechanism includes a first sliding member, a floating cutting tool, and a second sliding member. The floating cutting tool is mounted on the first sliding member. The first sliding member slides along the axial direction of Hole 1, allowing the floating cutting tool to enter Hole 1 before burrs form and stop at a position opposite to Hole 2. The floating cutting tool is also slidably mounted along the axial direction of Hole 2. After the floating cutting tool stops at the position opposite to Hole 2 and burrs form, the second sliding member slides relative to the first sliding member and engages with the floating cutting tool in a wedge shape, moving the floating cutting tool from a first position to a second position. The distance between the first position and Hole 2 is greater than the distance between the second position and Hole 2.

[0006] In one possible implementation, the first sliding member includes a cylindrical base with a diameter adapted to a hole. A mounting groove is formed through the base along its vertical diameter. A limiting protrusion is provided in the mounting groove. The floating cutter has a vertical groove and a horizontal groove. The vertical groove cooperates with the limiting protrusion to constrain the degrees of freedom of the floating cutter in the axial and horizontal radial directions of the base. The floating cutter moves vertically and inserts into the mounting groove, causing the limiting protrusion to insert into the mounting groove and limit the floating cutter from above, thereby defining a first position. The horizontal groove passes through the floating cutter axially and is used for the passage of a second sliding member, which limits the floating cutter from below, thereby defining a second position.

[0007] In one possible implementation, the limiting protrusions are symmetrically distributed in the horizontal radial direction and are located on both sides of the floating tool, the second sliding member is slidably connected to the first sliding member in the axial direction, and only the top surface of the second sliding member contacts the floating tool.

[0008] In one possible implementation, an elastic element is installed at the bottom of the vertical groove, and after the floating cutter is installed, the elastic element is located between the bottom of the groove and the limiting protrusion.

[0009] In one possible implementation, the bottom of the limiting protrusion is provided with a receiving groove for accommodating the elastic element and constraining the degree of freedom of the elastic element in the horizontal direction.

[0010] In one possible implementation, the first sliding member is provided with a material discharge area, which is located on both sides of the floating cutter and distributed along the axial direction of the hole, for receiving the removed burrs.

[0011] In one possible implementation, the second sliding member includes a strip-shaped base two, the top surface of which is a limiting surface. The limiting surface includes a first horizontal surface, a second horizontal surface, and an inclined surface. The second horizontal surface is lower than the first horizontal surface, and the inclined surface is located between the first and second horizontal surfaces. The floating cutter always maintains abutment contact with the limiting surface.

[0012] In one possible implementation, the pre-set puncture removal mechanism further includes an end positioning member, which, after the end of the first slider passes through the hole, abuts against the end of the first slider and limits and positions the first slider.

[0013] The above-described one or more technical solutions in the embodiments of the present invention have the following technical effects: According to the device for removing burrs from the inner side of intersecting holes based on a long-tipped wedge-driven tool provided in the embodiments of the present invention, a floating scraper is pre-positioned in the first hole opposite to the second hole before burr formation. After burr formation, it moves sequentially to both sides to scrape off the burrs on the corresponding sides, thereby effectively preventing burrs from being squeezed into the second hole and thus achieving full and effective burr removal. Simultaneously, the floating tool is controlled to move left and right by a first sliding member. Combined with the wedge-shaped fit between the second sliding member and the floating tool, the floating tool is positioned in a first position before the second hole is processed, providing sufficient processing space for the second hole. After the second hole is processed, the second sliding member slides relative to the first sliding member, allowing the floating tool to move quickly and stably to a second position, effectively removing burrs as the first sliding member slides left and right. This structure is simple, easy to assemble and operate, and can achieve reliable and efficient burr removal processing in space-constrained environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the workpiece structure.

[0015] Figure 2 This is a schematic diagram of the overall structure of the device for removing burrs on the inner side of intersecting holes based on a long-tipped wedge driven tool, as provided in an embodiment of the present invention.

[0016] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0017] Figure 4 This is a schematic diagram of the structure of the first sliding member of the device for removing burrs on the inner side of intersecting holes based on a long-tipped wedge driven tool provided in an embodiment of the present invention.

[0018] Figure 5 This is a schematic diagram of the structural state of the floating tool and the second sliding member when the floating tool of the device for removing burrs on the inner side of intersecting holes based on a long-tailed wedge driven tool provided in the embodiment of the present invention is in the first position.

[0019] Figure 6This is a schematic diagram of the structural state of the floating tool and the second sliding member when the floating tool of the device for removing burrs on the inner side of intersecting holes based on a long-tipped wedge driven tool provided in the embodiment of the present invention is in the second position.

[0020] Figure 7 This is a schematic diagram of the structure of the floating tool in the device for removing burrs on the inner side of intersecting holes based on a long-tipped wedge driven tool provided in an embodiment of the present invention.

[0021] Figure 8 This is a schematic diagram showing the state change of the elastic element when the floating tool of the device for removing burrs on the inner side of intersecting holes based on a long-tipped wedge driven tool provided in an embodiment of the present invention moves from the first position to the second position.

[0022] Figure 9 This is a top-view structural diagram of the blanking area of ​​the device for removing burrs on the inner side of intersecting holes based on a long-tipped wedge driven tool, as provided in an embodiment of the present invention.

[0023] In the figure: 1. Positioning and fixing mechanism; 2. Pre-set burr removal mechanism; 21. First sliding member; 211. Base one; 212. Mounting groove; 213. Limiting protrusion; 22. Floating tool; 23. Second sliding member; 231. Base two; 232. First horizontal plane; 233. Second horizontal plane; 234. Inclined plane; 24. Vertical groove; 25. Horizontal groove; 26. Elastic member; 27. Receiving groove; 28. Material dropping area; 29. ​​End positioning member; 3. Machining table; 4. Tapping mechanism; 100. Workpiece; 101. Hole one; 102. Hole two; 200. Burr. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Please see Figures 1-6 The device for removing burrs from the inner side of intersecting holes using a long-tipped wedge-driven cutting tool includes a positioning and fixing mechanism 1 and a pre-setting burr removal mechanism 2, both mounted on a machining table 3. A tapping mechanism 4 is also mounted on the machining table 3. The positioning and fixing mechanism 1 is used to fix the workpiece 100. The pre-setting burr removal mechanism 2 is used to remove burrs 200 generated at the intersecting holes.

[0026] In this embodiment, workpiece 100 is a fixing plate of an automobile hinge. Workpiece 100 has a first hole 101 and a second hole 102, where hole 101 is a pin hole and hole 102 is a set screw hole without tapping. After workpiece 100 is fixed, hole 101 is arranged horizontally in the left-right direction, and hole 102 is arranged vertically. The tapping mechanism 4 is used to tap hole 102.

[0027] The pre-set deburring mechanism 2 includes a floating cutter 22. Before tapping, the floating cutter 22 is placed inside hole one 101, with its position directly facing hole two 102. After tapping is completed and burrs 200 are generated, the floating cutter 22 is driven to reciprocate along the axial direction of hole one 101, thereby removing the burrs 200. Figure 6 As shown, the floating cutter 22 first moves to the right to cooperate with the solid material on the right to remove the burrs 200 in the right area; then it moves to the left to cooperate with the solid material on the left to remove the burrs 200 in the left area, thereby achieving a thorough and effective removal of the burrs 200.

[0028] It should be noted that the present invention is not only applicable to the removal of burrs generated during the tapping process of hole 2 102, but also applicable to the removal of burrs 200 generated during the processing of hole 2 102 when hole 1 101 is processed first and then hole 2 102 is processed.

[0029] See Figures 2-6 The pre-set deburring mechanism 2 also includes a first sliding member 21 and a second sliding member 23. The first sliding member 21 is slidably mounted on the processing table 3, and the second sliding member 23 is slidably mounted on the first sliding member 21. The floating tool 22 is slidably mounted on the first sliding member 21 with upper and lower limits, and is wedge-shapedly engaged with the second sliding member 23.

[0030] Specific working process: The positioning and fixing mechanism 1 first fixes the workpiece 100 in the tapping position, then the first sliding member 21 moves to the right, causing the floating tool 22 to enter the first hole 101 and stop at the position directly opposite the second hole 102. At this time, the floating tool 22 is in the first position (e.g., Figure 5 As shown in the figure, the floating tool 22 and the second hole 102 maintain a certain distance to provide machining space for subsequent tapping.

[0031] After the tapping of hole 102 is completed, the second sliding member 23 moves to the right, driving the floating tool 22 to move towards hole 102 through a wedge engagement, so that the floating tool 22 moves from the first position to the second position, as shown. Figure 6As shown, at this time, the top surface of the floating tool 22 is basically aligned with the inner wall of hole 101 in the axial direction. Then, simply move to the right to remove the burrs 200 in the right area, then move to the left to remove the burrs 200 in the left area, and finally continue to move to the left to make the floating tool 22 exit hole 101, and wait for the workpiece 100 to be replaced before starting the next cycle.

[0032] See Figures 3-7 The first sliding member 21 includes a cylindrical base 211. The diameter of the base 211 is adapted to the diameter of the hole 101, allowing the base 211 to pass through the hole 101 and fit against the inner wall of the hole 101. A mounting groove 212 is provided through the base 211 along the vertical diameter direction. Rectangular limiting protrusions 213 are provided on the front and rear inner walls of the mounting groove 212, and the limiting protrusions 213 are symmetrically distributed.

[0033] The floating cutter 22 has vertical grooves 24 and horizontal grooves 25. The vertical grooves 24 are symmetrically distributed front and back and correspond one-to-one with the limiting protrusions 213. The horizontal grooves 25 penetrate the floating cutter 22 in the left and right direction and are used for the passage of the second sliding member 23.

[0034] During the assembly of the floating tool 22, the floating tool 22 is first aligned with the mounting groove 212 and inserted from bottom to top, so that the limiting protrusion 213 enters the corresponding vertical groove 24 and abuts against the bottom of the vertical groove 24. Through the cooperation between the limiting protrusion 213 and the vertical groove 24, the degrees of freedom of the floating tool 22 are constrained in the front-back direction and the left-right direction, so that the floating tool 22 can only move in the vertical direction. At the same time, the bottom of the limiting protrusion 213 limits the floating tool 22, thereby limiting the stopping position of the floating tool 22 relative to the first sliding member 21 when it moves upward, which is the second position.

[0035] Subsequently, the second sliding member 23 is inserted into the transverse groove 25 from left to right, so that the second sliding member 23 limits the floating tool 22 from below, thereby limiting the downward movement stop position of the floating tool 22, which is the first position. At this point, the installation of the floating tool 22 is complete. This structure is not only simple in design, facilitating deburring work in limited spaces, but also facilitates the assembly and replacement of the floating tool 22.

[0036] See Figures 3-7 The second sliding member 23 includes a long strip-shaped base 231. A groove is formed on the base 211 for mounting the base 231. The base 231 is inserted into the groove and moves along it, forming an axial sliding connection with the base 211. The top surface of the base 231 is a limiting surface, and the floating cutter 22 always maintains contact with the limiting surface. The limiting surface includes a first horizontal surface 232, a second horizontal surface 233, and an inclined surface 234 located between the two.

[0037] like Figure 5 As shown, the second horizontal plane 233, the inclined plane 234, and the first horizontal plane 232 are arranged sequentially from the right end of the second base 231 to the left. The first horizontal plane 232 is lower than the second horizontal plane 233, forming a long-tailed wedge-shaped structure at the right end of the second base 231. In the initial state, the floating tool 22 rests against the second horizontal plane 233 under the action of gravity.

[0038] After workpiece 100 is fixed in the tapping position, base body 231 moves synchronously to the right along with base body 211 until the floating tool 22 is aligned with hole 102. At this time, the floating tool 22 is still against the second horizontal surface 233, i.e., in the first position. After the tapping is completed, base body 231 moves to the right, while base body 211 remains stationary. As base body 231 moves, the floating tool 22 moves upward under the limiting guidance of the inclined surface 234, moving from a state of contact with the second horizontal surface 233 to a state of contact with the first horizontal surface 232, as shown. Figure 6 As shown, the floating cutter 22 is in the second position at this time. The top left end of the transverse groove 25 of the floating cutter 22 has a rounded corner structure, which facilitates its engagement with the inclined surface 234, allowing the floating cutter 22 to move upwards smoothly. The second sliding member 23 only contacts the floating cutter 22 through its top, thereby reducing frictional resistance and improving the smoothness of the floating cutter 22's movement.

[0039] See Figure 4 , Figure 7 and Figure 8 An elastic element 26 is installed at the bottom of the vertical groove 24. After the floating cutter 22 is installed, the elastic element 26 is located between the bottom of the groove and the limiting protrusion 213, which helps the floating cutter 22 to smoothly return to the first position without affecting the ease of installation. Figure 8 As shown, the bottom of the elastic element 26 is fixedly installed on the bottom surface of the vertical groove 24, and the bottom of the limiting protrusion 213 has a receiving groove 27. During the process of the floating cutter 22 being inserted into the mounting groove 212 from bottom to top, as the limiting protrusion 213 is inserted into the corresponding vertical groove 24, the top of the elastic element 26 enters the receiving groove 27 and is compressed between the vertical groove 24 and the receiving groove 27, generating downward potential energy. Initially, the floating cutter 22 abuts against the second horizontal surface 233 under the action of gravity and the elastic force of the elastic element 26. When the base 231 moves to the right, causing the first horizontal surface 232 to limit the floating cutter 22, the elastic element 26 is further compressed and stores energy. After the floating cutter 22 completes the deburring work, the second sliding element 23 moves to the left, releasing the first horizontal surface 232 from limiting the floating cutter 22. The elastic element 26 releases its stored elastic energy, allowing the floating cutter 22 to smoothly return to the first position under the action of gravity and elastic force. The receiving groove 27 is used to constrain the degree of freedom of the elastic member 26 in the horizontal direction.

[0040] See Figure 2 , Figure 3 , Figure 5 and Figure 6 The pre-set deburring mechanism 2 also includes an end positioning member 29, which is slidably mounted on the processing table 3 and is positioned opposite to the first sliding member 21. Figure 3 As shown, after the base body 211 passes through the hole 101, it stops moving when its end abuts against the end positioning member 29. At this time, the floating tool 22 is facing the hole 102. This provides a positioning reference for the subsequent removal of burrs 200. After the tapping process is completed, the base body 211 moves to the right, and the end positioning member 29 moves to the right accordingly. Then, the base body 211 moves to the left, and the end positioning member 29 moves to the left to reset under the drive of the drive member, waiting for the next positioning limit.

[0041] The base 211 and the end positioning component 29 are driven by cylinders. The piston rod of the cylinder that drives the base 211 passes through the cylinder body from left to right. The base 211 is fixedly mounted on the right end of the piston rod. Another cylinder is mounted on the left end of the piston rod. This cylinder drives the base 231 to slide. The base 231 passes through the piston rod from left to right and slides relative to the base 211 under the drive of the cylinder, so as to realize the position adjustment of the floating cutter 22 during the deburring process.

[0042] See Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 9 The first sliding member 21 is provided with a material dropping area 28, which is located on both sides of the floating cutter 22 and distributed along the axial direction of the hole 101, and is used to receive the removed burrs 200.

[0043] like Figure 7 As shown, the top of the floating cutter 22 has an upwardly convex arc-shaped structure, while the left and right sides have inwardly concave arc-shaped structures. The connection between the left and top surfaces is the left cutting edge, and the connection between the right and top surfaces is the right cutting edge. When the floating cutter 22 moves to the right, the right cutting edge scrapes away the burrs 200 in the right-side area; when the floating cutter 22 moves to the left, the left cutting edge scrapes away the burrs 200 in the left-side area. The area between the left side and the left wall of the mounting groove 212, and the area between the right side and the right wall of the mounting groove 212, constitute the blanking area 28 (e.g., ...). Figure 9As shown in the diagram, the burrs 200 scraped off by the right blade fall into the right-side blanking area 28, and the burrs 200 scraped off by the left blade fall into the left-side blanking area 28. They will then be carried out of the hole 101 as the substrate 211 moves to the left. It should be noted that, to prevent the scraped burrs 200 from scratching the hole wall during their removal from the hole 101, receiving platforms (not shown in the diagram) can be installed on the left and right sides to receive the burrs 200 falling into the blanking area 28, preventing them from falling onto the inner wall of the hole 101. The floating blade 22 can be periodically removed for cleaning, or a vacuum cleaner can be used for cleaning.

[0044] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for removing burrs from the inner side of intersecting holes using a long-tipped wedge-driven cutting tool, comprising a positioning and fixing mechanism for fixing the workpiece; the workpiece having two interconnected holes; characterized in that: It also includes a pre-positioned puncture removal mechanism, which includes: First sliding element; A floating tool is mounted on a first sliding member. The first sliding member slides along the axial direction of hole one, so that the floating tool enters the interior of hole one before burrs are formed and stops at a position opposite to hole two. The floating tool is mounted by sliding along the axial direction of hole two. The second sliding member slides relative to the first sliding member and engages with the floating tool in a wedge shape after the floating tool stops at the position opposite to the second hole and burrs are formed, causing the floating tool to move from the first position to the second position. Among them, the distance between the first position and the second hole is greater than the distance between the second position and the second hole; The first sliding member is provided with a material discharge area, which is located on both sides of the floating cutter and distributed along the axial direction of the hole, for receiving the removed burrs. The second sliding member includes a long strip-shaped base two. The top surface of the base two is a limiting surface. The limiting surface includes a first horizontal surface, a second horizontal surface, and an inclined surface. The second horizontal surface is lower than the first horizontal surface, and the inclined surface is located between the first horizontal surface and the second horizontal surface. The floating cutter always maintains contact with the limiting surface. When the floating cutter is against the second horizontal surface, it is in the first position, and when the floating cutter is against the first horizontal surface, it is in the second position.

2. The apparatus for removing the inside flash of the intersecting hole based on the long pin inclined wedge driving cutter of claim 1, wherein: The first sliding member includes a cylindrical base, the diameter of which is adapted to the hole, and a mounting groove is provided through the base along the vertical diameter direction, with a limit protrusion provided in the mounting groove. The floating tool has vertical and horizontal slots. The vertical slots cooperate with the limiting protrusions to constrain the degrees of freedom of the floating tool in the axial and horizontal radial directions of the base. The floating tool moves vertically and inserts into the mounting slot, so that the limiting protrusions insert into the mounting slots and limit the floating tool from above to define the first position. The transverse groove passes through the floating tool in the axial direction to allow the second sliding member to pass through, thereby limiting the floating tool from below and defining the second position.

3. The device for removing burrs from the inner side of intersecting holes based on a long-tipped wedge-driven tool according to claim 2, characterized in that: The limiting protrusions are symmetrically distributed in the horizontal radial direction and are located on both sides of the floating tool. The second sliding member is slidably connected to the first sliding member in the axial direction, and only the top surface of the second sliding member contacts the floating tool.

4. The apparatus for removing the inside flash of the intersecting hole based on the long pin inclined wedge driving tool according to any one of claims 2 or 3, characterized in that: An elastic element is installed at the bottom of the vertical groove. After the floating cutter is installed, the elastic element is located between the bottom of the groove and the limiting protrusion.

5. The apparatus for removing the inside flash of the intersecting hole based on the long pin inclined wedge driving tool according to claim 4, wherein: The bottom of the limiting protrusion is provided with a receiving groove, which is used to accommodate the elastic element and constrain the degree of freedom of the elastic element in the horizontal direction.

6. The apparatus for removing the inside flash of the intersecting hole based on the long pin inclined wedge driving cutter according to claim 1 or 2, characterized in that: The pre-set puncture removal mechanism also includes an end positioning member, which is used to abut against the end of the first sliding member and limit and position the first sliding member after the end of the first sliding member passes through the hole.

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