A processing tool for a conical workpiece

Abstract

The present application relates to the technical field of machining, and particularly provides a machining tool for a conical workpiece, which comprises a clamping head, a locking sleeve is threadedly connected to the outer periphery of the clamping end of the clamping head, a first conical surface is arranged on the inner periphery of the clamping end, and a conical spring clamp is arranged on the clamping end in an axial sliding manner, the conical spring clamp can be pushed to slide in the axial direction when the locking sleeve is rotated, so that the side wall of the conical spring clamp is contracted or expanded under the constraint of the first conical surface, so that the conical spring clamp can flexibly change the inclination of the side wall thereof, ensuring that the conical spring clamp is tightly attached to the surface of a conical workpiece with different tapers, without the need for frequent replacement of clamps, greatly improving the adaptation range of the tool to conical workpieces of different specifications, and an air suction assembly is arranged, which can make the space between the conical workpiece and the conical spring clamp in a negative pressure state, so that the conical spring clamp can clamp a conical workpiece with a smooth surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machining, in particular to a machining tool for a conical workpiece. BACKGROUND

[0002] In the field of machining, conical workpieces (such as conical shafts, conical sleeves, precision valve cores, etc.) are widely used in core fields such as aerospace, automobile manufacturing, precision instruments, and hydraulic transmission due to their high centering accuracy and strong transmission stability. The adaptability, clamping stability, and compatibility of the clamping tool are extremely high during the machining process of such workpieces.

[0003] Under normal circumstances, when clamping the conical surface of a conical workpiece alone, it is difficult to obtain a large clamping force using a general clamp if the friction coefficient of the outer conical surface is small, and the clamping action cannot be completed only by the conical surface, which cannot adapt to some machining conditions. SUMMARY

[0004] Therefore, it is necessary to provide a machining tool for a conical workpiece to solve the problem that the current clamp cannot adapt to the conical surface of the conical workpiece when clamping the conical workpiece.

[0005] The above-mentioned purpose is achieved by the following technical solutions:

[0006] A machining tool for a conical workpiece, comprising:

[0007] A clamping head, a locking sleeve is threadedly connected to the outer periphery of the clamping end of the clamping head, the inner side wall of the clamping end of the clamping head is a first conical surface, and the large end of the first conical surface faces outward;

[0008] A conical spring collet is axially slidably arranged in the clamping end of the clamping head, the outer side wall of the conical spring collet is in sliding contact with the first conical surface, a second conical surface is arranged at the large end of the conical spring collet, the second conical surface is in sliding contact with the inner side of the locking sleeve, a third conical surface is arranged on the inner side of the locking sleeve away from the threadedly connected end, the third conical surface is in sliding sealing contact with the second conical surface, and the inclination of the side wall of the conical spring collet is positively correlated with the inclination of the surface of the conical workpiece;

[0009] An air suction assembly is configured to suck air between the conical spring collet and the conical workpiece when a conical workpiece with a smooth surface needs to be clamped.

[0010] Further, the side wall of the conical spring collet is uniformly provided with a plurality of first and second cut grooves in the circumferential direction, the first and second cut grooves are alternately distributed, the first cut groove extends from the large end to the small end of the conical spring collet and does not penetrate the small end, the second cut groove extends from the small end to the large end of the conical spring collet and does not penetrate the large end, and the cross-sectional area of the second cut groove gradually increases from the large end to the small end of the conical spring collet.

[0011] Further, a rubber strip is arranged in the first cut groove, and two surfaces of the rubber strip are respectively in abutment with two side walls of the first cut groove.

[0012] Further, the large end of the conical spring collet is provided with a sealing ring sleeve, the inner periphery of the sealing ring sleeve is in frictional sealing with the surface of the conical workpiece, and the outer periphery of the sealing ring sleeve is in frictional sealing with the inner periphery of the third conical surface.

[0013] Further, the inner periphery of the sealing ring sleeve is provided with a plurality of annular protrusions, the plurality of annular protrusions are elastic, the axes of the plurality of annular protrusions coincide with the axis of the sealing ring sleeve, and the plurality of annular protrusions are uniformly distributed along the axial direction of the sealing ring sleeve.

[0014] Further, a soft metal sheet is arranged between the second conical surface and the third conical surface.

[0015] Further, the air suction assembly comprises an air nozzle and an air suction pump, the air nozzle is rotationally sealed arranged in one end of the clamping head away from the clamping end, the air nozzle is internally through and communicates with the clamping end of the clamping head, and the air suction pump communicates with the air nozzle.

[0016] Further, two sealing rotary bearings are arranged between the outer periphery of the air nozzle and the inner periphery of the clamping head, the inner peripheries of the two sealing rotary bearings are connected with the outer periphery of the air nozzle, and the outer peripheries of the two sealing rotary bearings are connected with the inner periphery of the clamping head.

[0017] Further, the end face of the clamping end of the clamping head is a fourth conical surface, the large end of the fourth conical surface faces outward, a rubber ring piece is frictionally connected to the fourth conical surface, an elastic member is arranged between the rubber ring piece and the end of the locking sleeve away from the threaded connection, and the elastic member has a tendency to push the rubber ring piece.

[0018] Further, the elastic member has a plurality of elastic members, and the plurality of elastic members are uniformly distributed along the circumferential direction of the rubber ring piece.

[0019] The beneficial effects of the present application are:

[0020] The present application sets the locking sleeve which can rotate around its own axis and moves along the axial direction of the clamping head and the axial sliding conical spring chuck, when the locking sleeve rotates, it can push the conical spring chuck to slide axially, so that its side wall shrinks or expands under the constraint of the first conical surface, so that the conical spring chuck can flexibly change the inclination of its side wall, ensure that the conical workpiece surface of different taper is closely combined, without frequent replacement of the clamp, greatly improve the adaptation range of the tooling to different specifications of conical workpiece.

[0021] The present application sets the air suction assembly for making the space between the conical workpiece and the conical spring chuck in a negative pressure state, so that the conical spring chuck can clamp the conical workpiece with smooth surface.

[0022] The present application sets the sealing ring sleeve on the large end of the conical spring chuck, so as to improve the sealing between the conical workpiece and the conical spring chuck, and the inner periphery of the sealing ring sleeve is provided with a plurality of annular protrusions, which are tightly combined on the surface of the conical workpiece and deformed under the action of negative pressure, so as to increase the friction between the sealing ring sleeve and the outer periphery of the conical workpiece, so as to prevent the conical workpiece from separating from the conical spring chuck.

[0023] The present application sets the fourth conical surface on the end face of the clamping end of the clamping head, and the rubber ring piece is frictionally arranged on the fourth conical surface, the rubber ring piece is abutted on the fourth conical surface through the elastic element, the inner ring of the rubber ring piece can be tightly combined with the outer periphery of the conical workpiece under the action of the large end of the fourth conical surface outward, so as to further improve the friction of the outer periphery of the conical workpiece inward, and further prevent the conical workpiece from separating from the conical spring chuck. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The structure schematic view of the machining tooling of the conical workpiece is provided for an embodiment of the present application;

[0025] Figure 2 The machining tooling of the conical workpiece is provided for an embodiment of the present application; Figure 1 The left view of the machining tooling of the conical workpiece is provided for an embodiment of the present application;

[0026] Figure 3 The machining tooling of the conical workpiece is provided for an embodiment of the present application; Figure 2 The machining tooling of the conical workpiece is provided for an embodiment of the present application;

[0027] Figure 4 The machining tooling of the conical workpiece is provided for an embodiment of the present application; Figure 3 The machining tooling of the conical workpiece is provided for an embodiment of the present application;

[0028] Figure 5 The structure schematic view of the machining tooling of the conical workpiece is provided for an embodiment of the present application;

[0029] Figure 6 The machining tooling of the conical workpiece is provided for an embodiment of the present application;Figure 5 A left view of the machining tool for a conical workpiece according to an embodiment of the present application when clamping the conical workpiece;

[0030] Figure 7 A cross-sectional view along B-B of the machining tool for a conical workpiece according to an embodiment of the present application when clamping the conical workpiece; Figure 6 A left view of the machining tool for a conical workpiece according to an embodiment of the present application when clamping the conical workpiece;

[0031] Figure 8 A cross-sectional view along B-B of the machining tool for a conical workpiece according to an embodiment of the present application when clamping the conical workpiece; Figure 7 A left view of the machining tool for a conical workpiece according to an embodiment of the present application when clamping the conical workpiece;

[0032] Figure 9 A structure schematic view of the conical spring chuck of the machining tool for a conical workpiece according to an embodiment of the present application;

[0033] Figure 10 An exploded view of the machining tool for a conical workpiece according to an embodiment of the present application;

[0034] Figure 11 A cross-sectional view along B-B of the machining tool for a conical workpiece according to an embodiment of the present application when clamping the conical workpiece; Figure 10 A left view of the machining tool for a conical workpiece according to an embodiment of the present application when clamping the conical workpiece;

[0035] Wherein:

[0036] 100, clamping head; 110, clamping end; 120, first conical surface;

[0037] 200, conical spring chuck; 210, second conical surface; 220, first slot; 230, second slot; 240, locking sleeve; 250, limiting ring; 260, third conical surface; 270, fourth conical surface;

[0038] 300, sealing ring sleeve; 301, I-shaped groove; 310, connecting block; 320, connecting groove; 330, enlarged groove; 340, annular convex strip; 350, soft metal sheet; 360, rubber ring sheet; 370, elastic member;

[0039] 400, air nozzle; 410, rotating sealing bearing;

[0040] 500, conical workpiece. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below with embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0042] The serial numbers of components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0044] The present application provides a machining tool for a conical workpiece. Figures 1-11 The present application provides a machining tool for a conical workpiece.

[0045] A machining tool for a conical workpiece is suitable for clamping a conical workpiece 500, comprising a clamping head 100, a locking sleeve 240 is threadedly connected to the outer periphery of the clamping end 110 of the clamping head 100, the end of the locking sleeve 240 away from the threaded connection has an open end, and a limiting ring 250 is arranged near the open end, the locking sleeve 240 can move along the axial direction of the clamping head 100 when rotating around its own axis, the inner side of the clamping end 110 of the clamping head 100 is a first conical surface 120, and the large end of the first conical surface 120 is outward (in the direction of the arrow A in the figure), and the small end of the first conical surface 120 is inward (in the direction of the arrow B in the figure), the first conical surface 120 is arranged to be matched with the conical surface of the conical workpiece 500, and the clamping end 110 of the clamping head 100 is provided with a clamping mechanism 130, the clamping mechanism 130 is arranged to be matched with the clamping hole of the conical workpiece 500, and the clamping mechanism 130 is arranged to be matched with the clamping hole of the conical workpiece 500. Figure 3The clamping head 100 is internally provided with a taper spring chuck 200 axially slidingly arranged in the clamping end 110. The taper spring chuck 200 is conical in whole, and the outer side wall of the taper spring chuck 200 is in sliding contact with the first tapered surface 120. The large end of the taper spring chuck 200 is provided with a second tapered surface 210, which is in sliding contact with the inner side of the limiting ring 250 of the locking sleeve 240. The diameter of the limiting ring 250 is smaller than the diameter of the large end of the taper spring chuck 200, so that the locking sleeve 240 drives the taper spring chuck 200 to move axially. The inner side of the limiting ring 250 away from the threaded connection end of the locking sleeve 240 is provided with a third tapered surface 260, which is in sliding sealing with the second tapered surface 210. When the locking sleeve 240 rotates around its axis to move axially along the clamping head 100, the small end of the taper spring chuck 200 starts to contract through the second tapered surface 210 and the third tapered surface 260, thereby increasing the inclination of the taper spring chuck 200, so that the inner periphery of the taper spring chuck 200 can gradually contact the outer periphery of the tapered workpiece 500, and then the inclination of the side wall of the taper spring chuck 200 adapts to the inclination of the tapered workpiece 500. When the inclination of the tapered workpiece 500 is greater, the inclination of the taper spring chuck 200 is also greater to adapt to the tapered workpiece 500. When the inclination of the tapered workpiece 500 is smaller, the inclination of the taper spring chuck 200 is also smaller, so as to ensure that the side wall of the taper spring chuck 200 can tightly clamp the outer periphery of the tapered workpiece 500.

[0046] The clamping head 100 is internally provided with an air suction assembly, which is configured to suck the air between the taper spring chuck 200 and the tapered workpiece 500 when clamping the tapered workpiece 500 with a smooth surface, so that the space between the tapered workpiece 500 with a smooth surface and the taper spring chuck 200 is in a negative pressure state, thereby having an adsorption force on the tapered workpiece 500 with a smooth surface, improving the abutting force of the taper spring chuck 200 on the surface of the tapered workpiece 500, thereby improving the friction force of clamping the tapered workpiece 500, so that the spring chuck head 100 can also clamp the tapered workpiece 500 with a smooth surface.

[0047] It can be understood that the taper spring chuck 200 in the present application can adjust the inclination of its side wall according to the tapered workpiece 500 to be clamped, so as to adapt to the tapered workpiece 500 with different inclination degrees, and the air suction assembly can increase the friction force of the taper spring chuck 200 on the tapered workpiece 500 when the surface is relatively smooth, thereby preventing the tapered workpiece 500 from being separated from the taper spring chuck 200.

[0048] Specifically, to change the inclination of the conical spring collet 200, the side wall of the conical spring collet 200 in the embodiment is uniformly provided with a plurality of first cut grooves 220 and second cut grooves 230, and the material of the conical spring collet 200 is spring steel material, which can deform and reset. Figure 4 and Figure 9 As shown in the drawings, the first cut grooves 220 and the second cut grooves 230 are alternately distributed, the first cut grooves 220 extend from the large end to the small end of the side wall of the conical spring collet 200 and do not penetrate the small end, and the second cut grooves 230 extend from the small end to the large end of the side wall of the conical spring collet 200 and do not penetrate the large end. The cross-sectional area of the second cut grooves 230 gradually increases from the large end to the small end of the conical spring collet 200. When the locking sleeve 240 pushes the conical spring collet 200, the side wall of the conical spring collet 200 will gradually shrink under the action of the first conical surface 120, so that the cross-sectional area of the plurality of second cut grooves 230 gradually decreases, that is, the side wall of the second cut grooves 230 will gradually fit together, so that the diameter of the small end of the conical spring collet 200 decreases, and the overall inclination of the side wall gradually increases. When the side wall of the conical spring collet 200 fits the side wall of the conical workpiece 500, the inclination of the side wall of the conical spring collet 200 is the same as that of the conical workpiece 500. At this time, when the locking sleeve 240 continues to rotate, the side wall of the conical spring collet 200 clamps the conical workpiece 500.

[0049] It should be noted that the inclination of the conical workpiece 500 that can be adapted in the embodiment needs to be between the minimum inclination and the maximum inclination of the conical spring collet 200. If it exceeds the minimum or maximum inclination, a conical spring collet 200 of different size can be replaced to adapt to different conical workpieces 500, thereby greatly improving the application range of the machining tooling of the conical workpiece 500.

[0050] More specifically, the cross-sectional area of the first cut grooves 220 in the embodiment is the same everywhere, and a rubber strip (not shown in the drawings) is arranged in the first cut grooves 220. The two surfaces of the rubber strip respectively abut against the side wall of the first cut grooves 220. When the locking sleeve 240 pushes the conical spring collet 200 to move axially, since the second cut grooves 230 extend from the small end of the conical spring collet 200, and the first cut grooves 220 do not penetrate the small end of the conical spring collet 200, the side wall of the second cut grooves 230 approaches each other to gradually change the inclination of the conical spring collet 200. When the side wall of the second cut grooves 230 fits together, the locking sleeve 240 continues to rotate to push the conical spring collet 200 to move axially. Under the action of the second conical surface 210 and the third conical surface 260, the first cut grooves 220 begin to press the rubber strip, and the large end of the conical spring collet 200 gradually fits on the conical workpiece 500 to tightly clamp the conical workpiece 500.

[0051] In further embodiments, in order to enable the conical workpiece 500 to clamp the surface smooth conical workpiece 500, the present application needs to improve the sealing between the conical spring chuck 200 and the conical workpiece 500, and the present embodiment is provided with a sealing ring sleeve 300 at the large end of the conical spring chuck 200, as shown in Figure 8 、 Figure 10 and Figure 11 , the inner periphery of the sealing ring sleeve 300 is in frictional sealing connection with the surface of the conical workpiece 500, and the outer periphery of the sealing ring sleeve 300 is in frictional sealing with the third conical surface 260 inside the locking sleeve 240, so that the suction assembly can ensure that the conical workpiece 500 and the conical spring chuck 200 are in a negative pressure state when working.

[0052] In order to facilitate the connection of the sealing ring sleeve 300 and the conical spring chuck 200, the present embodiment is provided with a plurality of connection grooves 320 on the large end of the conical spring chuck 200, as shown in Figure 2 、 Figure 9 、 Figure 10 and Figure 11 , the connection grooves 320 are specifically provided on the second conical surface 210 and extend along the radial direction of the chuck 100, the enlarged grooves 330 are provided at the edge of the connection grooves 320, and a plurality of connection blocks 310 are provided on the outer periphery of the sealing ring sleeve 300, the plurality of connection blocks 310 are matched with the plurality of connection grooves 320, the provision of the enlarged grooves 330 makes the connection of the connection blocks 310 in the connection grooves 320 more closely, the sealing ring sleeve 300 in the present embodiment is made of rubber, when the plurality of connection blocks 310 are located in the plurality of connection grooves 320, the connection blocks 310 fill the connection grooves 320, so that the second conical surface 210 is a complete ring, when the second conical surface 210 contacts with the third conical surface 260 inside the locking sleeve 240, the connection blocks 310 on the sealing ring sleeve 300 also contact with the third conical surface 260.

[0053] Specifically, to further improve the sealing performance of the sealing ring 300, a plurality of annular protrusions 340 are arranged on the inner periphery of the sealing ring 300, and a I-shaped groove 301 is formed on the sealing ring 300, the axes of the plurality of annular protrusions 340 coincide with the axis of the sealing ring 300, the plurality of annular protrusions 340 are uniformly distributed along the axial direction of the sealing ring 300, the plurality of annular protrusions 340 are in frictional contact with the side wall of the conical workpiece 500, and when the air suction assembly is working, the plurality of annular protrusions 340 can be tightly attached to the side wall of the conical workpiece 500 under the action of negative pressure, that is, the external atmospheric pressure acts in the I-shaped groove 301 of the sealing ring 300 to push the sealing ring 300 to move towards the conical workpiece 500, so that the plurality of annular protrusions 340 are attached to the conical workpiece 500, and the plurality of annular protrusions 340 are deformed to increase the contact area between the annular protrusions 340 and the surface of the conical workpiece 500, so that the sealing performance is improved and the friction is also increased, further preventing the conical workpiece 500 from being separated from the conical spring collet 200.

[0054] In further embodiments, to reduce the resistance to the rotation of the locking sleeve 240 when the sealing ring 300 seals the conical spring collet 200 and the conical workpiece 500, a soft metal sheet 350 is arranged between the sealing ring 300 and the third conical surface 260 of the locking sleeve 240, which can reduce the friction between the third conical surface 260 and the sealing ring 300, thereby reducing the resistance to the rotation of the locking sleeve 240. If the soft metal sheet 350 is not arranged, but the sealing ring 300 directly contacts the third conical surface 260, since the material of the sealing ring 300 is rubber and the third conical surface 260 is metal, when the rubber sealing ring 300 is in sealing contact with the metal third conical surface 260, due to the large difference in friction coefficient between the two materials, a large friction force is generated, which makes it difficult for the locking sleeve 240 to rotate smoothly. Therefore, to reduce the friction, a soft metal sheet 350, such as a copper sheet, can be arranged between the sealing ring 300 and the third conical surface 260 of the locking sleeve 240. The soft metal sheet 350 can act as an intermediate transition layer, significantly reducing the friction resistance between the sealing ring 300 and the third conical surface 260, thereby making the rotation of the locking sleeve 240 more labor-saving and smooth. Compared with not arranging the soft metal sheet 350, the friction force acting on the locking sleeve 240 when rotating is much smaller.

[0055] Specifically, the air suction assembly in the embodiment includes an air nozzle 400 and an air pump (not shown in the figure), as Figure 2 and Figure 3As shown, the air nozzle 400 is rotatably and sealingly arranged at one end of the clamping head 100 away from the clamping end 110, and the air nozzle 400 is internally through and connected with the clamping end 110 of the clamping head 100, and the air nozzle 400 is connected with the air pump, and when the air pump works, it can extract the gas in the clamping end 110, so that the conical spring collet 200 and the conical workpiece 500 in the clamping end 110 are in a negative pressure state, and due to the arrangement of the soft metal sheet 350, the sealing between the third conical surface 260 and the outer periphery of the sealing ring 300 is reduced, and the air pump in the embodiment continuously works to continuously suck gas, thereby ensuring that the conical spring collet 200 and the conical workpiece 500 are always in a negative pressure state, and the falling phenomenon is avoided.

[0056] More specifically, in order to rotatably and sealingly connect the air nozzle 400 in the clamping head 100, two rotatable sealing bearings 410 are arranged on the inner periphery of the clamping head 100 in the embodiment, and the two rotatable sealing bearings 410 are arranged on the inner periphery of the clamping head 100. Figure 3 As shown, the inner periphery of the two rotatable sealing bearings 410 is sealingly connected with the outer periphery of the air nozzle 400, and the outer periphery of the two rotatable sealing bearings 410 is connected with the inner periphery of the clamping head 100, and when the conical workpiece 500 is installed, the clamping head 100 will rotate at high speed, at this time the outer periphery of the two rotatable sealing bearings 410 rotates synchronously, and through the arrangement of the two rotatable sealing bearings 410, the air nozzle 400 can maintain the space between the conical spring collet 200 and the conical workpiece 500 in a negative pressure state when the clamping head 100 rotates at high speed.

[0057] In further embodiments, the end face of the clamping end 110 of the clamping head 100 of the present application is a fourth conical surface 270, the large end of the fourth conical surface 270 faces outward, and a rubber ring 360 is frictionally connected to the fourth conical surface 270. Figure 7 and Figure 8 As shown, the rubber ring 360 and the locking sleeve 240 are arranged with an elastic element 370 away from the threaded connection end, the elastic element 370 is a compression spring, the elastic element 370 has a tendency to push the rubber ring 360, and when the locking sleeve 240 moves axially, it can push the elastic element 370, and the elastic element 370 pushes the rubber ring 360, and because the large end of the fourth conical surface 270 faces outward (right in the figure), Figure 8 so when the elastic element 370 pushes the rubber ring 360, the rubber ring 360 can also shrink towards the center of the circle, so that the inner ring of the rubber ring 360 is in frictional contact with the conical workpiece 500, and the rubber ring 360 provides an inward friction force to the conical workpiece 500, further avoiding the conical workpiece 500 from falling off the conical spring collet 200.

[0058] It should be noted that the elastic element 370 in the embodiment has a plurality of elastic elements 370, which are uniformly distributed along the circumference of the rubber ring 360, so that the rubber ring 360 can uniformly shrink towards the center of the circle.

[0059] The specific working process of the machining tool for the conical workpiece provided by the application is described in combination with the above embodiments.

[0060] First, the clamping head 100 is fixed on a machine tool (not shown in the figure) away from the clamping end 110, and the air nozzle 400 on one end of the clamping head 100 is connected with a suction pump (not shown in the figure), and then the conical workpiece 500 is clamped.

[0061] When clamping the conical workpiece 500 with a rough surface:

[0062] Without starting the suction pump, the operator first aligns the conical workpiece 500 to be clamped and fixed inside the conical spring chuck 200 and inserts the small end of the conical workpiece 500 into the conical spring chuck 200, and then the operator rotates the locking sleeve 240 to move the locking sleeve 240 along the axial direction of the clamping head 100. At this time, the third conical surface 260 inside the locking sleeve 240 pushes the second conical surface 210 of the conical spring chuck 200, so that the conical spring chuck 200 as a whole moves towards the clamping head 100. Since the outer periphery of the side wall of the conical spring chuck 200 is in sliding contact with the first conical surface 120 of the clamping head 100, the side wall of the second cut groove 230 on the conical spring chuck 200 begins to gradually approach, so that the diameter of the small end of the conical spring chuck 200 gradually decreases, and the inclination of the side wall of the conical spring chuck 200 gradually becomes the same as the inclination of the conical workpiece 500. When the inclinations of the two are the same, the side wall of the conical spring chuck 200 is in frictional contact with the outer periphery of the conical workpiece 500. As the operator continues to rotate the locking sleeve 240, the conical spring chuck 200 can tightly clamp the outer periphery of the conical workpiece 500, and the first cut groove 220 on the conical spring chuck 200 begins to compress the rubber strip, so that the large end of the conical spring chuck 200 tightly clamps the conical workpiece 500.

[0063] When clamping the conical workpiece 500 with a smooth surface:

[0064] Other steps are the same as the above-mentioned clamping surface rough cone-shaped workpiece 500, the difference is that the need to start the air pump, air pump through the air nozzle 400 between the conical spring chuck 200 and the conical workpiece 500 gas is extracted, the sealing ring set 300 and the rubber ring piece 360 are respectively friction sealed with the outer periphery of the conical workpiece 500 at this time, so that the conical spring chuck 200 and the conical workpiece 500 are in a negative pressure state, so that the conical workpiece 500 is subjected to suction force, thereby preventing the surface smooth conical workpiece 500 from being separated from the conical spring chuck 200, as the operator continues to rotate the locking sleeve 240, the locking sleeve 240 moves axially along the clamping head 100, which will squeeze the elastic member 370, the elastic member 370 pushes the rubber ring piece 360 so that the inner ring of the rubber ring piece 360 can be tightly frictionally abutted on the outer periphery of the conical workpiece 500, and the plurality of annular protrusions 340 on the inner periphery of the sealing ring set 300 are deformed, thereby increasing the contact area between the annular protrusions 340 and the outer periphery of the conical workpiece 500, thereby increasing the friction force of the sealing ring set 300 to the outer periphery of the conical workpiece 500 inward, thereby preventing the conical workpiece 500 from being separated from the conical spring chuck 200.

[0065] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0066] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A machining fixture for a conical workpiece, characterized in that, include: The clamping head has a locking sleeve threaded to the outer circumference of its clamping end. The inner sidewall of the clamping end of the clamping head is a first conical surface, with the larger end of the first conical surface facing outward. A tapered spring collet is axially slidably disposed within the clamping end of a clamping head. The outer wall of the tapered spring collet slides in contact with a first tapered surface. A second tapered surface is provided at the large end of the tapered spring collet, which slides in contact with the inner side of a locking sleeve. A third tapered surface is provided on the inner side of the locking sleeve at the end away from the threaded connection. The third tapered surface slides and seals with the second tapered surface. The inclination of the side wall of the tapered spring collet is positively correlated with the inclination of the tapered workpiece surface. The tapered spring collet has multiple first and second grooves evenly distributed around its sidewall. The first and second grooves are alternately distributed. The first groove extends from the large end to the small end of the tapered spring collet but does not penetrate the small end. The second groove extends from the small end to the large end of the tapered spring collet but does not penetrate the large end. The cross-sectional area of ​​the second groove gradually increases from the large end to the small end of the tapered spring collet. The first groove has a uniform cross-sectional area, and a rubber strip is installed within it, with its two surfaces abutting against the two side walls of the groove. A sealing ring is installed at the large end of the tapered spring collet. The inner circumference of the sealing ring rubs against the surface of the tapered workpiece, and the outer circumference rubs against the inner circumference of the third tapered surface. Multiple annular protrusions are provided on the inner circumference of the sealing ring, these protrusions being elastic. The axes of these protrusions coincide with the axis of the sealing ring and are evenly distributed along the axial direction of the sealing ring. The end face of the clamping head is a fourth tapered surface, with its large end facing outwards. A rubber ring is frictionally connected to the fourth tapered surface. An elastic element is installed between the rubber ring and the end of the locking sleeve furthest from the threaded connection, and this elastic element tends to push against the rubber ring. Multiple elastic elements are evenly distributed along the circumference of the rubber ring. The suction assembly is configured to draw air from between the tapered spring collet and the tapered workpiece when it is necessary to clamp a smooth tapered workpiece.

2. The machining fixture for the conical workpiece according to claim 1, characterized in that, A soft metal sheet is placed between the second and third conical surfaces.

3. The machining fixture for the conical workpiece according to claim 1, characterized in that, The suction assembly includes an air nozzle and a suction pump. The air nozzle is rotated and sealed inside the end of the clamping head away from the clamping end. The air nozzle is internally connected to the clamping end of the clamping head, and the suction pump is connected to the air nozzle.

4. The machining fixture for the conical workpiece according to claim 3, characterized in that, Two sealed rotary bearings are provided between the outer circumference of the air nozzle and the inner circumference of the clamping head. The inner circumferences of the two sealed rotary bearings are connected to the outer circumference of the air nozzle, and the outer circumferences of the two sealed rotary bearings are connected to the inner circumference of the clamping head.

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