Mechanical cutting machining method for rubber gasket and compound tool

Abstract

According to the rubber gasket mechanical cutting machining method and the compound cutter, an outer cutter body is elastically installed at the lower end of an inner cutter body and can move up and down in the axis direction of the inner cutter body, the outer cutter body is positioned on the inner cutter body through a radial positioning piece, and an outer cutting edge used for cutting the outer circle of the rubber gasket is arranged at the lower end of the outer cutter body; the lower end of the inner cutter body is provided with an inner cutting edge located in the lower end of the outer cutter body and used for cutting the inner circle of the rubber gasket, and the upper end of the inner cutter body is fixedly connected with the drill chuck in a clamped mode. And in the process that the drill chuck drives the inner cutter body and the outer cutter body to move downwards and rotate synchronously, the outer cutting edge and the inner cutting edge sequentially cut a rubber plate flatly laid on the working table surface of the drill floor to form a rubber gasket. The problems that the production cost is too high when a vulcanization mold pressing method is adopted under the small-batch requirement condition, and punching machining and other machines cannot conduct machining are solved, the structure is simple, the design is reasonable, the machining cost is low, the efficiency is high, the production quality is effectively guaranteed, and the mold is suitable for the aerospace instrument industry or other small-batch requirement projects.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a mechanical cutting processing method for a rubber gasket and a composite tool. Background Art

[0002] In the aerospace instrumentation industry, there is a circular gasket made of rubber with certain elasticity and toughness, with a rectangular cross-section and a small difference in inner and outer diameters. Due to industry limitations, the demand is very small. If conventional vulcanization molding methods are used to produce it, the cost is too high. If the rubber sheet is processed by punching, the processed parts have problems such as uneven inner and outer circles, poor coaxiality, and large roundness deviations. This method cannot produce qualified parts. Therefore, in response to the above problems, it is necessary to design a simple, efficient and reliable processing method to achieve low-cost processing of smooth, uniform and regular rubber gaskets. Summary of the invention

[0003] The technical problem solved by the present invention is as follows: a mechanical cutting processing method for rubber gaskets and a composite tool are provided, which adopt an inner tool body with an inner blade at the lower end and an outer tool body elastically mounted on the inner tool body and with an outer blade at the lower end. Under the premise that the radial positioning member radially positions the outer tool body and limits the axial stroke, the outer blade and the inner blade cut the rubber gasket in turn on the rubber plate laid on the work surface of the drilling platform during the process of the drill chuck driving the inner tool body and the outer tool body to move downward and rotate synchronously. The problem that the production cost of the vulcanization molding method is too high and the problem that the punching processing and other mechanical processing methods cannot be used under the condition of small batch demand is solved. The structure is simple, the design is reasonable, the processing cost is low, and the efficiency is high. The production quality is effectively guaranteed, and the present invention is suitable for the aerospace instrument industry or other small batch demand projects.

[0004] The technical solution adopted by the present invention is a mechanical cutting method for rubber gaskets, comprising the following steps:

[0005] 1) Design of composite tool: The composite tool comprises an outer tool body and an inner tool body with a T-shaped push rod installed inside, wherein the lower ends of the outer tool body and the inner tool body are respectively provided with an outer blade and an inner blade;

[0006] 2) Install the T-shaped push rod in the inner cutter body: fix the upper end of the second spring in the center at the top of the inner hole of the inner cutter body, insert the cross bar from the guide slot hole on one side of the upper end of the inner cutter body and pass through the guide slot hole on the other side, install the vertical bar into the inner hole from the lower end of the inner cutter body, and adjust the cross bar so that the screw hole in the middle of the cross bar is coaxially arranged with the second spring, and make the external thread section at the upper end of the vertical bar fit with the screw hole in the middle of the cross bar to form a T-shaped push rod by the cross bar and the vertical bar, and the positioning boss at the upper end of the vertical bar extends out of the screw hole in the middle of the cross bar and fits with the lower end of the second spring;

[0007] 3) Installation of the outer cutter body on the inner cutter body: a spring set is mounted on the inner cutter body, the outer cutter body is mounted on the inner cutter body from the lower end of the inner cutter body, and the outer cutter body is radially positioned and axially fixed on the inner cutter body by a transmission pin that is adapted to be connected with a threaded hole on the outer circumferential wall of the upper end of the outer cutter body and extends into a strip hole on the inner cutter body. At this time, an upper end of the spring abuts against a positioning boss on the outer circumferential wall of the inner cutter body, and a lower end of the spring abuts against an annular surface at the upper end of the outer cutter body, and the inner blade is arranged higher than the outer blade;

[0008] 4) Installation of the composite tool on the drilling machine: the assembled composite tool is moved as a whole to the drilling machine, and the shank of the small diameter section at the upper end of the inner tool body (4) is clamped on the chuck of the drilling machine for standby use;

[0009] 5) Laying of rubber raw materials: Lay a non-metallic pad on the work surface of the drilling machine, and lay the raw materials of the rubber gasket flat on the non-metallic pad;

[0010] 6) Cutting of the rubber gasket: Start the drilling machine, adjust the main spindle speed of the rotary machine to low speed, operate the drilling machine to move the composite tool downward as a whole until the outer blade of the outer blade body contacts the surface of the raw material, and start cutting the outer circle of the rubber gasket; when the inner blade of the composite tool at the lower end of the inner blade body contacts the surface of the raw material, the inner blade cuts the inner circle of the rubber gasket until the outer blade and the inner blade contact the non-metallic pad at the same time; at this time, the rubber gasket formed by rotary cutting is located between the outer blade and the inner blade and is embedded in the annular groove on the outer circumferential wall at the lower end of the inner blade body;

[0011] 7) Material discharge: lift the spindle, move the composite tool upward and away from the raw material, press the spindle stop button to stop the composite tool from rotating. At this time, under the action of spring 1, the outer tool body moves down and resets, and under the action of spring 2, the T-type push rod moves down to push out the circular waste material in the inner hole of the inner tool body. The boss on the circumferential wall of the outer tool body is used as the fulcrum, and the outer tool body is manually moved upward until the rubber gasket is exposed, and the rubber gasket is removed to complete the rotary cutting and forming process of the rubber gasket.

[0012] The invention discloses a mechanical cutting and processing device for rubber gaskets, comprising an outer cutter body and an inner cutter body whose upper end is clamped and connected to a drill chuck, wherein the outer cutter body is elastically mounted on the lower end of the inner cutter body and can move up and down along the axis of the inner cutter body, the outer cutter body is positioned on the inner cutter body through a radial positioning member, the lower end of the outer cutter body is provided with an outer blade for cutting the outer circle of the rubber gasket, and the lower end of the inner cutter body is provided with an inner blade located inside the lower end of the outer cutter body and used for cutting the inner circle of the rubber gasket, the upper end of the inner cutter body is clamped and fixedly connected to a drill chuck, and the drill chuck drives the inner cutter body and the outer cutter body to move downward and rotate synchronously, and the outer blade and the inner blade cut the rubber gasket in turn on the rubber plate laid flat on the work surface of the drilling platform, and the inner cutter body is provided with a chip removal device for automatic chip removal.

[0013] Among them, the radial positioning part is a transmission pin, a threaded hole is formed on the outer circumferential wall of the upper end of the outer cutter body, and a strip hole corresponding to the position of the threaded hole and arranged parallel to the axial direction of the inner cutter body is formed on the outer circumferential wall of the inner cutter body, the external thread of the outer half of the transmission pin is adapted to be connected with the threaded hole, and the inner end of the transmission pin extends into the strip hole, so as to realize the radial positioning of the outer cutter body on the inner cutter body and the axial fixed stroke limit.

[0014] Furthermore, a positioning boss is formed on the outer circumferential wall in the middle of the inner cutter body, and an upper end of a spring mounted on the inner cutter body abuts against the positioning boss and a lower end of the spring abuts against the upper end annular surface of the outer cutter body.

[0015] Furthermore, an inverted cone section with a lower end diameter smaller than an upper end diameter is formed on the outer circumferential wall at the lower end of the outer cutter body, and an outer blade is formed at the intersection of the lower edge of the inverted cone section and the lower edge of the inner hole of the outer cutter body. A boss located above the inverted cone section is formed on the outer cutter body, and a radial positioning piece connected to the outer cutter body is located above the boss.

[0016] Furthermore, the inner hole at the lower end of the inner tool body is an inner tapered hole with an upper end diameter smaller than a lower end diameter, an annular groove is formed on the outer circumferential wall of the lower end of the inner tool body, and an inner blade is formed at the intersection of the lower edge of the annular groove and the lower edge of the inner tapered hole, and a strip hole for inserting a transmission pin for radial positioning is provided on the outer circumferential wall of the inner tool body and is located between the annular groove and the positioning convex ring.

[0017] Furthermore, the chip removal device includes a T-shaped push rod and a second spring. The outer wall of the inner cutter body is symmetrically provided with guide slot holes that are connected to the inner hole and located above the positioning convex ring, and the two ends of the horizontal rod of the T-shaped push rod arranged in the inner hole of the inner cutter body pass through the guide slot holes at the corresponding ends. The upper end of the second spring is fixed to the top of the inner hole of the inner cutter body, and the lower end of the second spring is adapted to be connected to the positioning convex column in the middle of the horizontal rod of the T-shaped push rod, and under the action of the second spring, the T-shaped push rod moves up when the inner blade cuts the inner ring of the rubber gasket, or moves down to eject the waste when the inner blade moves up after cutting.

[0018] The advantages of the present invention compared with the prior art are:

[0019] 1. This technical solution adopts an inner cutter body with an inner blade at the lower end and an outer cutter body elastically mounted on the inner cutter body and with an outer blade at the lower end. Under the premise that the radial positioning member performs radial positioning and axial fixed stroke limiting on the outer cutter body, the outer blade and the inner blade cut the rubber plate laid flat on the work surface of the drilling platform in turn to form a rubber gasket when the drill chuck drives the inner cutter body and the outer cutter body to move downward and rotate synchronously, thereby solving the problem that the production cost of the vulcanization molding method is too high and the punching process and other mechanical processing are impossible under the condition of small batch demand;

[0020] 2. This technical solution provides a positioning and storage space for the rubber gaskets cut from the inner and outer rings by setting an annular groove at the lower end of the inner cutter body, and positions the rubber gasket when cutting the inner ring after the outer ring is cut, thereby ensuring the cutting quality and accuracy of the inner ring;

[0021] 3. This technical solution adopts a structure in which a transmission pin is used to radially position the outer cutter body on the inner cutter body and to limit the axial travel, thereby providing conditions for sequential cutting of the outer and inner rings of the rubber gasket, and facilitating the rapid resetting of the outer cutter body after the cut rubber gasket is removed;

[0022] 4. This technical solution has a simple structure, reasonable design, low processing cost, high efficiency, and effective guarantee of production quality. It is suitable for the aerospace instrument industry or other small-batch demand projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is an axial cross-sectional view of the inner cutter body of the present invention;

[0025] Figure 3 It is an axial cross-sectional view of the outer cutter body of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention Figure 1-3 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0029] Mechanical cutting method for rubber gaskets, such as Figure 1 As shown, the following steps are included:

[0030] 1) Design of composite tool: The composite tool comprises an outer tool body 1 and an inner tool body 4 with a T-shaped push rod 5 installed inside, wherein the lower ends of the outer tool body 1 and the inner tool body 4 are respectively provided with an outer blade 1-1 and an inner blade 4-3;

[0031] 2) The T-shaped push rod 5 is installed in the inner cutter body 4: the upper end of the spring 26 is fixed in the center at the top of the inner hole of the inner cutter body 4, the cross bar 5-1 is inserted from the guide slot hole 7 on one side of the upper end of the inner cutter body 4 and passes through the guide slot hole 7 on the other side, the vertical bar 5-2 is installed into the inner hole of the inner cutter body 4 from the lower end, and the cross bar 5-1 is adjusted so that the screw hole in the middle of the cross bar 5-1 is coaxially arranged with the spring 26, and the external thread section at the upper end of the vertical bar 5-2 is adapted to be connected with the screw hole in the middle of the cross bar 5-1, and then the T-shaped push rod 5 is formed by the cross bar 5-1 and the vertical bar 5-2, and the positioning boss at the upper end of the vertical bar 5-2 extends out of the screw hole in the middle of the cross bar 5-1 and is adapted to be connected with the lower end of the spring 26;

[0032] 3) Installation of the outer cutter body 1 on the inner cutter body 4: The spring 3 is mounted on the inner cutter body 4, and the outer cutter body 1 is mounted on the inner cutter body 4 from the lower end of the inner cutter body 4, and the outer cutter body 1 is radially positioned and axially fixed on the inner cutter body 4 by a transmission pin 2 that is adapted to be connected with the threaded hole 1-4 on the outer circumferential wall of the upper end of the outer cutter body 1 and extends into the strip hole 4-2 on the inner cutter body 4. At this time, the upper end of the spring 3 abuts against the positioning boss 4-1 on the outer circumferential wall of the inner cutter body 4, and the lower end of the spring 3 abuts against the upper annular surface of the outer cutter body 1, and the inner blade 4-3 is arranged higher than the outer blade 1-1;

[0033] 4) Installation of the composite tool on the drilling machine: Move the assembled composite tool as a whole to the drilling machine, and clamp the small diameter section of the shank at the upper end of the inner tool body 4 on the chuck of the drilling machine for standby use;

[0034] 5) Laying of rubber raw materials: Lay a non-metallic pad on the work surface of the drilling machine, and lay the raw materials of the rubber gasket flat on the non-metallic pad; Laying of the non-metallic pad can reduce the wear of the inner blade 4-3 and the outer blade 1-1 and increase the service life. Among them, a non-metallic pad with moderate hardness and flexibility is selected to avoid damage to the blade;

[0035] 6) Cutting of the rubber gasket: Start the drilling machine, adjust the main spindle speed of the rotary machine to low speed, operate the drilling machine to move the composite tool downward as a whole until the outer blade 1-1 of the outer blade body 1 contacts the surface of the raw material, and start cutting the outer circle of the rubber gasket; when the composite tool continues to move downward and the inner blade 4-3 at the lower end of the inner blade body 4 contacts the surface of the raw material, the inner blade 4-3 cuts the inner circle of the rubber gasket until the outer blade 1-1 and the inner blade 4-3 contact the non-metallic pad at the same time; at this time, the rubber gasket formed by rotary cutting is located between the outer blade 1-1 and the inner blade 4-3 and is embedded in the annular groove 4-5 on the outer circumferential wall at the lower end of the inner blade body 4;

[0036] 7) Material discharge: lift the spindle, move the composite tool up and away from the raw material, press the spindle stop button to stop the composite tool from rotating, at this time, under the action of spring 1 3, the outer tool body 1 moves down and resets, under the action of spring 2 6, the T-shaped push rod 5 moves down to push out the circular waste material in the inner hole of the inner tool body 4, use the boss 1-3 on the outer circumferential wall of the outer tool body 1 as the fulcrum, manually move the outer tool body 1 upward until the rubber gasket is exposed, remove the rubber gasket, and complete the rotary cutting and forming process of the rubber gasket, wherein the boss 1-3 is mainly for the convenience of manually moving the outer tool body 1 upward, and the knurled outer circle can also be used to replace the boss 1-3 to achieve the same function.

[0037] Composite tools for mechanical cutting of rubber gaskets, such as Figure 1As shown, it comprises an outer cutter body 1 and an inner cutter body 4 which is clamped and connected with a drill chuck at its upper end, the outer cutter body 1 being elastically mounted at the lower end of the inner cutter body 4 and being movable up and down along the axis direction of the inner cutter body 4, the outer cutter body 1 being positioned on the inner cutter body 4 by a radial positioning member, the lower end of the outer cutter body 1 being provided with an outer blade 1-1 for cutting the outer circle of the rubber gasket, and the lower end of the inner cutter body 4 being provided with an inner blade 4-3 which is located inside the lower end of the outer cutter body 1 and is used for cutting the inner circle of the rubber gasket, the upper end of the inner cutter body 4 being clamped and fixedly connected with a drill chuck, and the drill chuck drives the inner cutter body 4 and the outer cutter body 1 to move downward and rotate synchronously, and the outer blade 1-1 and the inner blade 4-3 are respectively moved on the rubber gasket laid flat on the work surface of the drilling platform. The rubber gasket is formed by cutting on the rubber plate, and the inner cutter body 4 is provided with a chip removal device for automatic chip removal; in the above structure, an inner cutter body 4 with an inner blade 4-3 at the lower end and an outer cutter body 1 elastically mounted on the inner cutter body 4 and with an outer blade 1-1 at the lower end are adopted. Under the premise that the radial positioning member performs radial positioning and axial fixed stroke limiting on the outer cutter body 1, the outer blade 1 and the inner blade 4 are sequentially cut on the rubber plate laid on the work surface of the drilling platform by the outer blade 1 and the inner blade 4 in the process of the drill chuck driving the inner cutter body 4 and the outer cutter body 1 to move downward and rotate synchronously to form a rubber gasket, which solves the problem that the production cost of the vulcanization molding method is too high and the punching process and other mechanical processing are impossible to process under the condition of small batch demand;

[0038] like Figure 1 As shown, the specific connection structure of the radial positioning member is as follows: the radial positioning member is a driving pin 2, a threaded hole 1-4 is formed on the outer circumferential wall of the upper end of the outer cutter body 1, and a strip hole 4-2 corresponding to the position of the threaded hole 1-4 and arranged parallel to the axial direction of the inner cutter body 4 is formed on the outer circumferential wall of the inner cutter body 4, the external thread of the outer half of the driving pin 2 is adapted to be connected with the threaded hole 1-4, and the inner end of the driving pin 2 extends into the strip hole 4-2, so as to realize the radial positioning of the outer cutter body 1 on the inner cutter body 4 and the axial positioning Stroke limit; Specifically, a positioning boss 4-1 is formed on the outer circumferential wall of the middle part of the inner cutter body 4, and the upper end of the spring 3 mounted on the inner cutter body 4 abuts against the positioning boss 4-1, and the lower end of the spring 3 abuts against the upper end annular surface of the outer cutter body 1; In the above structure, the transmission pin 2 is used to radially position the outer cutter body 1 on the inner cutter body 4 and to limit the axial stroke, which provides conditions for the sequential cutting of the outer ring and the inner ring of the rubber gasket, and is conducive to the rapid reset of the outer cutter body 1 after the cut rubber gasket is taken out;

[0039] like Figure 3 As shown, the specific structure of the outer tool body 1 is as follows: an inverted cone section 1-2 with a lower end diameter smaller than an upper end diameter is formed on the outer circumferential wall at the lower end of the outer tool body 1, and an outer blade 1-1 is formed at the intersection of the lower edge of the inverted cone section 1-2 and the lower edge of the inner hole of the outer tool body 1, and a boss 1-3 located above the inverted cone section 1-2 is formed on the outer tool body 1, and a radial positioning piece connected to the outer tool body 1 is located above the boss 1-3.

[0040] like Figure 2 As shown, the specific structure of the inner tool body 4 is as follows: the inner hole at the lower end of the inner tool body 4 is an inner tapered hole 4-4 whose upper end diameter is smaller than the lower end diameter, an annular groove 4-5 is formed on the outer circumferential wall of the lower end of the inner tool body 4, and an inner blade 4-3 is formed at the intersection of the lower edge of the annular groove 4-5 and the lower edge of the inner tapered hole 4-4, and a strip hole 4-2 for inserting the transmission pin 2 for radial positioning on the outer circumferential wall of the inner tool body 4 is located between the annular groove 4-5 and the positioning convex ring 4-1; in the above structure, by setting the annular groove 4-5 at the lower end of the inner tool body 4, a positioning storage space is provided for the rubber gaskets cut from the inner and outer rings, and the rubber gasket is positioned when the inner ring is cut after the outer ring is cut, so as to ensure the quality and accuracy of the inner ring cutting.

[0041] like Figure 1 As shown, the chip removal device includes a T-shaped push rod 5 and a spring 6. The outer wall of the inner cutter body 4 is symmetrically provided with guide slots 7 connected to the inner hole and located above the positioning convex ring 4-1, and the two ends of the horizontal rod of the T-shaped push rod 5 arranged in the inner hole of the inner cutter body 4 pass through the guide slots 7 at the corresponding ends. The upper end of the spring 6 is fixed to the top of the inner hole of the inner cutter body 4. A positioning column can also be arranged in the middle of the top surface of the inner hole of the inner cutter body 4, so that the upper end of the spring 6 is tightly fitted on the positioning column, and the lower end of the spring 6 is adapted to be connected to the positioning convex column in the middle of the horizontal rod of the T-shaped push rod 5, that is, it is tightly fitted on the positioning convex column, and under the action of the spring 6, the T-shaped push rod 5 is realized when the inner blade 4-3 cuts the inner ring of the rubber gasket. When the rod 5 moves up or the inner blade 4-3 moves up after cutting, the T-shaped push rod 5 moves down to eject the waste; in the above structure, when the inner blade 4-3 cuts the inner ring of the rubber gasket, the lower end of the T-shaped push rod 5 is against the middle part of the cutting position of the inner ring of the rubber gasket. As the inner blade 4-3 rotates and moves down for cutting, the spring 26 is compressed, and the T-shaped push rod 5 gradually moves up until the inner ring of the rubber gasket is cut. The cut circular waste is located in the inner hole of the inner blade body 4. When the structure moves up as a whole, the circular waste in the inner blade body 4 is pushed out by the T-shaped push rod 5 during the resetting process of the spring 26, thereby realizing the automatic discharge of the waste in the inner conductor 4, wherein the lower end of the T-shaped push rod 5 is flush with the inner blade 4-3 in the initial state.

[0042] The assembled composite cutting tool is clamped on the drilling machine and can be used for processing rubber gaskets. The upper end handle of the inner cutter body 4 is clamped on the chuck of the drilling machine for standby use; the raw material of the rubber gasket is spread flat on the working surface of the drilling machine (in order to reduce the wear of the cutting tool, a non-metallic pad of appropriate hardness can be laid on the working surface); the machine tool is started, the spindle speed is adjusted to a low speed, and the machine tool is operated to make the composite cutting tool move downward with the spindle and the drill chuck until the outer blade 1-1 of the outer cutter body 1 contacts the surface of the raw material and starts to cut the outer circle of the part, and continues to move downward until the outer blade 1-1 contacts the working surface (or pad), and continues to move downward. At this time, the outer cutter body 1 no longer moves downward, and the inner cutter body 4 moves downward to the point where the inner blade 4 -3 cuts the inner circle of the part until the inner cutter body 4 contacts the work surface (or pad). At this time, the rubber gasket part has been formed and embedded between the inner cutter body 4 and the outer cutter body 1, specifically between the outer cutter body 1 and the annular groove 4-5. Lift the spindle, the composite cutting tool leaves the raw material, press the spindle stop button to stop the composite cutting tool from rotating. During this process, the rubber 2 6 is reset, and the T-shaped push rod 5 is pushed down to push the waste material in the inner cutter body 4 out. Then, use the boss 1-3 on the outer cutter body 1 (or the boss 1-3 can be replaced by the knurled structure of the outer circle) as the fulcrum, manually move the outer cutter body 1 upwards until the rubber gasket is exposed, remove the rubber gasket part, and complete the processing of a part.

[0043] The processing method and structure adopt a circumferential direction rotary cutting method for processing, and are used to manufacture circular sealing rings with rectangular cross-sections, thereby solving the problem of low molding and manufacturing precision of circular sealing rings with rectangular cross-sections, especially the molding and manufacturing problem of circular sealing rings with rectangular cross-sections whose difference between the outer diameter and the inner diameter is small. The outer and inner circle edges of the products manufactured by the present invention are very regular, no burrs are generated, and both dimensional precision and shape precision are high. When the difference between the outer diameter and the inner diameter is small, the dimensional precision and shape precision can also be guaranteed, without deformation, and waste discharge is convenient and fast, realizing automatic waste discharge. The processing of the rubber gasket can be completed by using a bench-top drilling machine or a milling machine.

[0044] This technical solution has a simple structure, reasonable design, low processing cost, high efficiency, and effectively guaranteed production quality. It is suitable for the aerospace instrument industry or other small-batch demand projects.

[0045] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A mechanical cutting method for rubber gaskets, characterized in that: The following steps are involved: 1) Designing a composite tool: The composite tool comprises an outer tool body (1) and an inner tool body (4) with a T-shaped push rod (5) installed inside, wherein the lower ends of the outer tool body (1) and the inner tool body (4) are respectively provided with an outer blade (1-1) and an inner blade (4-3); 2) The T-shaped push rod (5) is installed in the inner cutter body (4): the upper end of the second spring (6) is fixed in the center at the top of the inner hole of the inner cutter body (4), the cross bar (5-1) is inserted into the guide slot hole (7) on one side of the upper end of the inner cutter body (4) and passes through the guide slot hole (7) on the other side, the vertical bar (5-2) is installed into the inner hole of the inner cutter body (4) from the lower end, and the cross bar (5-1) is adjusted so that the screw hole in the middle of the cross bar (5-1) is coaxially arranged with the second spring (6), and the external thread section at the upper end of the vertical bar (5-2) is matched with the screw hole in the middle of the cross bar (5-1), and then the cross bar (5-1) and the vertical bar (5-2) form a T-shaped push rod (5), and the positioning protrusion at the upper end of the vertical bar (5-2) extends out of the screw hole in the middle of the cross bar (5-1) and is matched with the lower end of the second spring (6); 3) Installation of the outer blade body (1) on the inner blade body (4): The spring (3) is mounted on the inner blade body (4), and the outer blade body (1) is mounted on the inner blade body (4) from the lower end of the inner blade body (4), and the outer blade body (1) is radially positioned and axially limited on the inner blade body (4) by a driving pin (2) which is adapted to be connected with a threaded hole (1-4) on the outer circumferential wall of the upper end of the outer blade body (1) and extends into a strip hole (4-2) on the inner blade body (4). At this time, the upper end of the spring (3) abuts against the positioning boss (4-1) on the outer circumferential wall of the inner blade body (4), and the lower end of the spring (3) abuts against the annular surface of the upper end of the outer blade body (1), and the inner blade (4-3) is arranged higher than the outer blade (1-1); 4) Installation of the composite tool on the drilling machine: the assembled composite tool is moved as a whole to the drilling machine, and the shank of the small diameter section at the upper end of the inner tool body (4) is clamped on the chuck of the drilling machine for standby use; 5) Laying of rubber raw materials: Lay a non-metallic pad on the work surface of the drilling machine, and lay the raw materials of the rubber gasket flat on the non-metallic pad; 6) Cutting of the rubber gasket: start the drilling machine, adjust the main shaft speed of the rotary machine to a low speed, operate the drilling machine to move the composite tool as a whole downward until the outer blade (1-1) of the outer blade body (1) contacts the surface of the raw material, and start cutting the outer circle of the rubber gasket; the composite tool continues to move downward and when the inner blade (4-3) at the lower end of the inner blade body (4) contacts the surface of the raw material, the inner blade (4-3) cuts the inner circle of the rubber gasket until the outer blade (1-1) and the inner blade (4-3) contact the non-metallic pad at the same time; at this time, the rubber gasket formed by rotational cutting is located between the outer blade (1-1) and the inner blade (4-3) and is embedded in the annular groove (4-5) on the outer circumferential wall at the lower end of the inner blade body (4); 7) Material discharge: lift the spindle, move the composite cutter upward and away from the raw material, press the spindle stop button to stop the composite cutter from rotating, then the outer cutter body (1) moves downward and resets under the action of spring 1 (3), and the T-shaped push rod (5) moves downward under the action of spring 2 (6) to push out the circular waste material in the inner hole of the inner cutter body (4), and use the boss (1-3) on the outer circumferential wall of the outer cutter body (1) as the fulcrum to manually move the outer cutter body (1) upward until the rubber gasket is exposed, and then remove the rubber gasket to complete the rotary cutting and forming process of the rubber gasket.

2. The composite tool for mechanical cutting of rubber gaskets according to claim 1, characterized in that: The composite tool comprises an outer tool body (1) and an inner tool body (4) whose upper end is clamped and connected to a drill chuck. The outer tool body (1) is elastically mounted on the lower end of the inner tool body (4) and can move up and down along the axis of the inner tool body (4). The outer tool body (1) is positioned on the inner tool body (4) through a radial positioning member. The lower end of the outer tool body (1) is provided with an outer blade (1-1) for cutting the outer circle of the rubber gasket, and the lower end of the inner tool body (4) is provided with an inner blade (4-3) located inside the lower end of the outer tool body (1) and used for cutting the inner circle of the rubber gasket. The upper end of the inner tool body (4) is clamped and fixedly connected to the drill chuck. When the drill chuck drives the inner tool body (4) and the outer tool body (1) to move downward and rotate synchronously, the outer blade (1-1) and the inner blade (4-3) cut the rubber gasket on the rubber plate laid flat on the work surface of the drilling platform in sequence. The inner tool body (4) is provided with a chip removal device for automatic chip removal.

3. The composite tool for mechanical cutting of rubber gaskets according to claim 2, characterized in that: The radial positioning member is a driving pin (2); a threaded hole (1-4) is formed on the outer circumferential wall of the upper end of the outer cutter body (1); and a strip hole (4-2) corresponding to the position of the threaded hole (1-4) and arranged parallel to the axial direction of the inner cutter body (4) is formed on the outer circumferential wall of the inner cutter body (4); the external thread of the outer half of the driving pin (2) is adaptively connected to the threaded hole (1-4), and the inner end of the driving pin (2) extends into the strip hole (4-2), so as to realize radial positioning of the outer cutter body (1) on the inner cutter body (4) and axial travel limiting.

4. The composite tool for mechanical cutting of rubber gaskets according to claim 3 is characterized in that: A positioning boss (4-1) is formed on the outer circumferential wall in the middle of the inner blade body (4), and the upper end of a spring (3) mounted on the inner blade body (4) abuts against the positioning boss (4-1) while the lower end of the spring (3) abuts against the upper annular surface of the outer blade body (1).

5. The composite tool for mechanical cutting of rubber gaskets according to claim 2, characterized in that: An inverted cone section (1-2) having a lower diameter smaller than an upper diameter is formed on the outer circumferential wall at the lower end of the outer blade body (1), and an outer blade (1-1) is formed at the intersection of the lower edge of the inverted cone section (1-2) and the lower edge of the inner hole of the outer blade body (1). A boss (1-3) located above the inverted cone section (1-2) is formed on the outer blade body (1), and a radial positioning member connected to the outer blade body (1) is located above the boss (1-3).

6. The composite tool for mechanical cutting of rubber gaskets according to any one of claims 2 to 5, characterized in that: The inner hole at the lower end of the inner cutter body (4) is an inner tapered hole (4-4) whose upper end diameter is smaller than the lower end diameter; an annular groove (4-5) is formed on the outer circumferential wall of the lower end of the inner cutter body (4); an inner blade (4-3) is formed at the intersection of the lower edge of the annular groove (4-5) and the lower edge of the inner tapered hole (4-4); a strip hole (4-2) provided on the outer circumferential wall of the inner cutter body (4) for inserting a transmission pin (2) for radial positioning is located between the annular groove (4-5) and the positioning convex ring (4-1).

7. The mechanical cutting device for rubber gaskets according to claim 6, characterized in that: The chip removal device comprises a T-shaped push rod (5) and a second spring (6); the outer wall of the inner cutter body (4) is symmetrically provided with guide slots (7) which are connected to the inner hole and are located above the positioning convex ring (4-1); and the two ends of the horizontal rod of the T-shaped push rod (5) arranged in the inner hole of the inner cutter body (4) extend through the guide slots (7) at the corresponding ends; the upper end of the second spring (6) is fixed to the top of the inner hole of the inner cutter body (4); and the lower end of the second spring (6) is adapted to be connected to the positioning convex column in the middle of the horizontal rod of the T-shaped push rod (5); and under the action of the second spring (6), the T-shaped push rod (5) moves upward when the inner blade (4-3) cuts the inner ring of the rubber gasket, or moves downward to eject waste when the inner blade (4-3) moves upward after cutting.

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