CN218692980U - Spinning system and clamping machine head - Google Patents

Abstract

The utility model relates to a spinning system and clamping machine head belongs to tubular product processing technology field. The material clamping machine head comprises a main shaft box, a hollow rotating main shaft, a pipe clamping mechanism and a hollow rotary oil cylinder, wherein the pipe clamping mechanism and the hollow rotary oil cylinder are arranged on the front end part and the rear end part of the hollow rotating main shaft; the pipe clamping mechanism is an outer-clamping inner-supporting type pipe clamping mechanism, the outer-clamping inner-supporting type pipe clamping mechanism comprises an outer pipe clamping mechanism and an inner pipe supporting mechanism, and in the working process, the hollow rotary oil cylinder can synchronously drive the inner clamping action of the outer pipe clamping mechanism and the outer supporting action of the inner pipe supporting mechanism based on the pull rod mechanism. The outer clamping type pipe clamping mechanism is improved into an outer clamping inner supporting type pipe clamping mechanism, and the inner surface and the outer surface of the pipe are clamped based on synchronous driving of the rotary oil cylinder, so that the clamping firmness of the pipe is effectively improved, the problem of slipping of the short pipe in the spinning forming process is effectively avoided, the yield and the processing efficiency of products are improved, and the pipe clamping mechanism can be widely applied to the manufacturing fields of refrigeration, automobiles, aviation and the like.

Description

Spinning system and clamping machine head

Technical Field

The utility model relates to a tubular product processing technology field, specifically speaking relates to a be suitable for and carry out the spinning system of centre gripping spinning to the nozzle stub section, and can be used to found the double-layered material aircraft nose of this spinning system.

Background

In the production and manufacturing process of tubular parts, it is generally necessary to spin-press the ends of a pipe, for example, in the process of producing a silencer, and it is necessary to spin-press both ends of a tubular raw material to obtain an end necking structure, for example, patent document CN110064693A discloses a production line of a silencer, which implements necking-spinning processing of both ends of a tubular raw material mainly based on the cooperation of two spinning machines and a pipe feeding device.

Structurally, the spinning machine usually adopts the technical scheme disclosed in patent document with publication number CN209867085U, and specifically includes a frame, a spinning head, a clamping head and an axial feed driver, the spinning head, the clamping head and the axial feed driver being mounted on the frame, the clamping head including a rotating main shaft and a pipe clamping mechanism mounted on the front end portion of the rotating main shaft; in the working process, the servo motor drives the rotating main shaft to rotate through the synchronous belt, so that the pipe section to be spun clamped on the clamping mechanism rotates along with the rotating main shaft; the opening and closing of the pipe clamping mechanism are controlled by adopting a hollow rotary oil cylinder arranged on the tail end of the main shaft.

For the pipe clamping mechanism, the general structure is as disclosed in the patent document with publication number CN110666058a, as shown in the structure of fig. 9 in the specification of the patent document, specifically includes a collet sleeve 33 provided with an inner conical surface and an elastic collet, the elastic collet has an outer conical surface, the outer conical surface is matched with the inner conical surface arranged on the collet sleeve 33 to form a wedge-shaped surface type radial pushing mechanism, i.e. the outer conical surface and the inner conical surface form a wedge-shaped surface type radial pushing match, so that the conversion between axial displacement and radial displacement is realized, and the radial opening and closing action is realized based on the axial movement of the elastic collet; for ease of manufacture and installation, the collet is generally configured to include a collet base 34 and a clip 30 removably attached to an outer end thereof; the elastic clip base 34 is usually a six-piece elastic sheet structure, and sometimes an elastic support ring is used to increase the external elastic force; in the working process, a pull rod fixedly connected with the elastic clamp head seat 34 is pulled through a hollow rotary oil cylinder arranged on the tail end part of the rotating main shaft, the pull rod pulls the elastic clamp head seat 34, and an inward thrust component is generated based on the cooperation of the wedge-shaped surface type radial pushing mechanism so as to push the clamping piece 30 to clamp the inner clamp, thereby clamping the peripheral surface of the tubular raw material from the outside; the tension rod applies a reverse force to the resilient clip base 34 to drive the clip 30 to expand, thereby releasing the grip on the tubular log.

The pipe clamping mechanism with the structure can clamp tubular raw materials with longer length well, but the tubular raw materials with shorter length can be clamped, so that the problem of slippage is easy to occur in the spinning forming process, and the finished product rate and the processing efficiency of products are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a material clamping machine head with an improved structure, so as to better clamp the short pipes;

the utility model mainly aims at providing a spinning system who founds by above-mentioned double-layered material aircraft nose.

In order to realize the main purpose, the utility model provides a material clamping machine head which is used for clamping the pipe; the material clamping machine head comprises a main shaft box, a hollow rotating main shaft, a pipe clamping mechanism and a hollow rotary oil cylinder, wherein the hollow rotating main shaft is rotatably arranged on the main shaft box; an axial piston of the hollow rotary oil cylinder drives the pipe clamping mechanism to open and close through a pull rod mechanism, and the pull rod mechanism penetrates through a hollow inner cavity of the hollow rotary main shaft; the pipe clamping mechanism is an external-clamping and internal-supporting pipe clamping mechanism, and the external-clamping and internal-supporting pipe clamping mechanism comprises an external pipe clamping mechanism and an internal pipe supporting mechanism; the pipe outer clamping mechanism comprises a clamping head sleeve and an elastic clamping head which forms a wedge-shaped surface type radial pushing fit with the clamping head sleeve; the elastic chuck is sleeved in the chuck sleeve, and the chuck sleeve is fixedly arranged on the front end part of the hollow rotating main shaft; the pipe internal support mechanism comprises an elastic expansion sleeve, and a fixed pushing cone and a movable pushing cone which are matched with the elastic expansion sleeve; the fixed pushing cone is fixedly arranged on the front end part of the hollow rotating main shaft, and the pointed cone end part of the fixed pushing cone is sleeved on the inner side port of the elastic expansion sleeve; the tip end of the movable pushing cone is sleeved on the outer port of the elastic expansion sleeve; the front end part of the connecting rod mechanism comprises a first connecting part and a second connecting part, and the first connecting part is fixedly connected with the movable pushing cone after penetrating through an inner hole on the fixed pushing cone; the elastic chuck is fixedly arranged on the second connecting part, so that the hollow rotary oil cylinder can synchronously drive the inner clamping action of the pipe outer clamping mechanism and the outer supporting action of the pipe inner supporting mechanism based on the pull rod mechanism.

In the technical scheme, the outer-clamping type pipe clamping mechanism is improved into the outer-clamping inner-supporting type pipe clamping mechanism, the inner surface and the outer surface of the pipe are clamped based on synchronous driving of the hollow rotary oil cylinder, so that the clamping firmness of the pipe is effectively improved, the problem of slipping of the short pipe in the spinning forming process is effectively avoided, and the yield and the processing efficiency of products are improved.

The specific scheme is that the pull rod mechanism comprises an inner pull rod and a tubular outer pull rod sleeved outside the inner pull rod; the front end part of the tubular outer pull rod forms a second connecting part; the front end part of the inner pull rod forms a first connecting part; the rear end parts of the tubular outer pull rod and the tubular inner pull rod are fixedly connected with the axial piston. The technical scheme can effectively facilitate the manufacture of the pull rod mechanism and the connection and installation with other matching parts.

The more specific scheme is that the rear end part of the tubular outer pull rod is fixedly connected with the axial piston, and the connecting position of the connecting structure of the tubular outer pull rod and the tubular outer pull rod on the axial direction of the tubular outer pull rod can be adjusted and locked; the rear end part of the inner pull rod is fixedly connected with the rear end part of the tubular outer pull rod, and the connecting position of the connecting structure of the inner pull rod and the tubular outer pull rod can be adjusted and locked in the axial direction of the inner pull rod. According to the technical scheme, the tubular outer pull rod, the tubular inner pull rod and the tubular axial piston are connected in an adjustable mode, so that the axial displacement is adjustable, the position between the movable pushing cone and the fixed pushing cone can be adjusted, meanwhile, the position between the elastic chuck and the chuck sleeve can be adjusted, the assembling and debugging of equipment are facilitated, the requirement on the machining error of parts is lowered, and the equipment cost is lowered.

The further proposal is that the fixed mounting position of the fixed pushing cone on the front end part of the hollow rotating main shaft can be adjusted and locked; and/or the fixed mounting position of the movable pushing cone on the front end part of the inner pull rod can be adjusted and locked. According to the technical scheme, the position of the fixed pushing cone and/or the movable pushing cone can be adjusted, so that the relative position of the fixed pushing cone and/or the movable pushing cone and the elastic expansion sleeve can be adjusted conveniently in the equipment assembling and debugging process, the clamped pipe can be better adapted, the requirements on manufacturing errors of different parts are reduced, and the cost is further reduced.

The further proposal is that two end parts of the inner pull rod are both provided with external thread structures; the screw hole arranged on the movable pushing cone is screwed with the external thread arranged on the front end part of the inner pull rod and is locked by the locking nut; after the internal thread arranged at the rear end part of the tubular outer pull rod is screwed with the external thread arranged on the rear end part of the inner pull rod, the locking nut locks the internal thread. The technical scheme can further simplify the structure of the equipment and is convenient for adjusting the positions of the equipment.

The preferred scheme is that a through hole penetrating through the side wall of the elastic chuck is arranged on the elastic chuck, and the fixed pushing cone is fixedly arranged on the chuck sleeve by fastening a connecting piece; the through hole is a long hole structure with a long shaft arranged along the axial direction of the hollow rotating main shaft, so that the elastic chuck can move relative to the fastening connecting piece in the axial direction. This technical scheme is convenient for carry out fixed mounting to fixed top pushes away the cone.

More preferably, the number of the through holes is more than two, and the through holes are arranged at intervals around the circumference of the elastic chuck; the fixed pushing cone comprises a cone body part, a fixed connecting slide block part and a sleeved pipe part, wherein the fixed connecting slide block part extends outwards from the outer edge of the cone body part along the radial direction, and the sleeved pipe part extends from the bottom surface of the cone body part along the axial direction; the sleeving pipe part can be sleeved in the front end part of the tubular outer pull rod in a relatively rotating manner, and the chuck sleeve is provided with a fixing and connecting hole; the fixed connection sliding block part penetrates through the long hole structure and can slide relative to the long hole structure in the axial direction of the hollow rotating main shaft; the bolt penetrating through the fixed connecting hole is matched with a screw hole arranged on the fixed connecting slide block part, so that the fixed pushing cone is fixedly arranged on the collet sleeve.

More preferably, a guide sleeve is sleeved between the sleeving pipe part and the front end part of the tubular outer pull rod, and a first inner shoulder and a first clamp spring groove are formed in the front end part of the tubular outer pull rod; one end face of the guide sleeve is clamped and pressed on the first inner shoulder, and the other end face of the guide sleeve is clamped and pressed by a clamp spring clamped in the first clamp spring groove.

The preferable proposal is that the fixed pushing cone comprises a cone part and a sleeving pipe part formed by extending from the bottom surface of the cone part along the axial direction; the tubular outer pull rod comprises a front tubular part and a rear thin tubular part; the front tubular part comprises a small-diameter tube part with the same diameter as the rear thin tubular part and a large-diameter tube part fixedly connected to the front end part of the small-diameter tube part; the rear thin tubular part and the small-diameter tube part are connected in a sleeved mode, and a first guide sleeve sleeved outside the inner pull rod is tightly pressed at the sleeved connection position of the rear thin tubular part and the small-diameter tube part; a second guide sleeve is sleeved between the sleeving pipe part and the large-diameter pipe part, and a first inner shoulder and a first clamp spring groove are formed in the large-diameter pipe part; one end face of the second guide sleeve is clamped and pressed on the first inner shoulder, and the other end face of the second guide sleeve is clamped and pressed by a clamp spring clamped in the first clamp spring groove. This technical scheme provides two guide sleeves of certain distance of interval for the cooperation between interior pull rod and the tubulose outer pull rod to be convenient for the position control in the adjustment process, and provide the support.

The preferred scheme is that the elastic chuck comprises an elastic chuck seat and a clamping piece; the elastic clamping head seat is of a multi-petal structure, and more than one clamping piece is detachably and fixedly connected to the inner side of each petal structure. The technical scheme is convenient for processing and mounting the chuck.

In order to achieve the other purpose, the spinning system provided by the utility model comprises a spinning machine and a pipe material feeding device; the spinning machine comprises a rack, and a material clamping machine head and a spinning machine head which are arranged on the rack, wherein the pipe material feeding device is used for feeding pipes to the material clamping machine head; wherein, the clamping machine head is the clamping machine head described in any one of the above technical schemes.

Drawings

Fig. 1 is a perspective view of a spinning machine in an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a perspective view of the material clamping head after omitting the rotary driver in the embodiment of the present invention;

FIG. 4 is a bottom view of the material clamping head after omitting the rotary driver in the embodiment of the present invention;

FIG. 5 is a sectional view of the material clamping machine head along the direction D-D shown in FIG. 4 according to the embodiment of the present invention;

fig. 6 is a perspective view of the elastic clamping head seat in the embodiment of the present invention;

FIG. 7 is a perspective view of an embodiment of the movable pushing cone of the present invention;

fig. 8 is a perspective view of the elastic expansion sleeve in the embodiment of the present invention;

fig. 9 is a perspective view of a clip according to an embodiment of the present invention;

fig. 10 is an exploded view of an embodiment of the collet of the present invention;

FIG. 11 is an enlarged view of a portion of the structure shown in FIG. 2;

FIG. 12 is an enlarged view of a portion B of FIG. 11, which is a schematic view of the process for clamping the tube;

fig. 13 is a schematic view illustrating a process of releasing the clamped tube according to the embodiment of the present invention;

fig. 14 is a schematic structural view of a pipe supporting mechanism for clamping a pipe in an embodiment of the present invention;

fig. 15 is a schematic structural view of a pipe internal supporting mechanism when the pipe is released according to the embodiment of the present invention;

fig. 16 is a schematic structural view of a pull rod mechanism and a pipe inner supporting mechanism in an embodiment of the present invention;

FIG. 17 is an enlarged view of portion C of FIG. 16;

fig. 18 is a flowchart of an assembly debugging method according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

The utility model discloses mainly improve to the structure of the clamp material host computer on the current spinning-lathe, specifically for improving the drive control mechanism of tubular product fixture and centre gripping/release action to can carry out the centre gripping to the shorter tubular product of length better, and then improve the yield and the machining efficiency to tubular product spinning. According to this concept, the structure of the feeding device of the spinning machine, the frame, the hollow rotary spindle in the spinning head and the clamping head, etc. can be designed with reference to the existing product, and is not limited to the following embodiments.

Examples

The utility model discloses spinning system includes spinning machine 1 as shown in fig. 1, is used for carrying out the tubular product loading attachment of material loading and the control unit of control their working process to this spinning machine 1, to tubular product loading attachment's concrete structure, can refer to the technical scheme that prior art documents such as patent document that publication number is CN110666058A disclose. The control unit comprises a memory, a processor and a control screen for receiving control commands, so that after control commands input by an operator through the touch screen or control keys are received, the processor executes corresponding programs stored in the memory, and controls the spinning machine 1 and the pipe feeding device to act in sequence to spin the pipe.

As shown in fig. 1 to 5, the spinning machine 1 of the present invention includes a frame 10, and a material clamping head 2 and a spinning head 12 mounted on the frame 10; the material clamping machine head 2 comprises a main spindle box 20 fixedly arranged on a machine frame 10, a hollow rotating main shaft 3 rotatably arranged on the main spindle box 20, a rotary driver for driving the hollow rotating main shaft 3 to rotate, a pipe clamping mechanism 4 arranged on the front end part of the hollow rotating main shaft 3, and a hollow rotary oil cylinder 5 arranged on the tail end part of the hollow rotating main shaft 3; an axial piston of the hollow rotary oil cylinder 5 drives the pipe clamping mechanism 4 to act through the pull rod mechanism 6, so that the pipe 01 is clamped or released. The rotary drive is specifically a rotary motor, which drives the hollow rotary spindle 3 to rotate according to a preset rotation speed and a rotation direction through a belt transmission mechanism, and the belt transmission mechanism includes a belt pulley 13 fixedly connected with the tail end of the hollow rotary spindle 3.

Referring to fig. 2 to 17, in the embodiment, the tube clamping mechanism 4 is an external-clamping and internal-supporting tube clamping mechanism, that is, in the process of clamping the tube 01, the tube 01 is clamped not only from the outside of the tube, but also from the inside of the tube, so as to increase the clamping area and improve the clamping firmness of the tube 01; the pipe clamping mechanism 4 specifically comprises an outer pipe clamping mechanism 7 and an inner pipe supporting mechanism 8.

The pipe external clamping mechanism 7 comprises a clamping head sleeve 70 with an inner conical surface 701 and an elastic clamping head 71 with an outer conical surface 719, wherein the elastic clamping head 71 is sleeved in the clamping head sleeve 70, and the inner conical surface 701 is matched with the outer conical surface 719 to form a wedge-shaped surface type radial pushing mechanism, so that axial displacement is converted into radial displacement, and the elastic clamping head 71 is driven to open and close; the chuck sleeve 70 is fixedly attached to the front end portion of the hollow rotary main shaft 3 by a fixing bolt 709 so as to be rotatable in synchronization with the hollow rotary main shaft 3. As shown in fig. 10, the collet 71 includes a collet base 710, a clip 711 and an elastic supporting ring 712, and the outer tapered surface 719 is disposed on the collet base 710; the elastic clip head seat 710 is a multi-petal structure, and more than one clip 711 is detachably and fixedly connected to the inner side of each petal structure, in this embodiment, one clip 711 is fixedly installed; the end face of the elastic chuck base 710 is provided with a clamping groove 7100, and an elastic supporting ring 712 is clamped, so as to improve the outward extending elastic force of the elastic chuck 71.

As shown in fig. 14 and 15, the tube internal supporting mechanism 8 includes an elastic expansion sleeve 80, and a fixed pushing cone 81 and a movable pushing cone 82 which are adapted to the elastic expansion sleeve 80. Wherein, the fixed pushing cone 81 is fixedly installed on the front end part of the hollow rotating main shaft 3, and the pointed cone end part of the fixed pushing cone 81 is sleeved on the inner port of the elastic expansion sleeve 80, so that a wedge-shaped surface type radial pushing mechanism is formed by the conical surface 8100 and the inner port of the elastic expansion sleeve 80 to realize the conversion between axial displacement and radial displacement; the tip end of the movable pushing cone 82 is also sleeved on the outer port of the elastic expansion sleeve 80, so that a wedge-shaped surface type radial pushing mechanism is formed by the conical surface 8200 and the outer port of the elastic expansion sleeve 80 to realize the conversion between axial displacement and radial displacement, the elastic expansion sleeve 80 is clamped from the ports on two sides to control the outward expansion or inward contraction of the elastic expansion sleeve 80, and the supporting clamping or releasing of the pipe 01 sleeved on the outer side of the elastic expansion sleeve is realized.

Referring to fig. 5 to 17, the pull rod mechanism 6 passes through the hollow inner cavity of the hollow rotary spindle 3 and structurally comprises a tubular outer pull rod 60 and an inner pull rod 90 sleeved in the tubular outer pull rod 60; structurally, the elastic chuck 71 is fixedly arranged on the front end part of the tubular outer pull rod 60, and specifically, the end parts of the elastic chuck and the tubular outer pull rod are sleeved and fixedly connected by adopting a thread structure; the front end of the inner pull rod 90 passes through an inner hole 810 formed on the fixed pushing cone 81 and is fixedly connected to the movable pushing cone 82, and in this embodiment, the front end of the inner pull rod is locked by the lock nut 15 after being engaged with an external thread formed on the front end of the inner pull rod 90 through a threaded hole 828 formed on the movable pushing cone 82.

In the present embodiment, the fixed pushing cone 81 is indirectly and fixedly mounted on the front end portion of the hollow rotating spindle 3, specifically, through holes 7101 penetrating through the side wall of the elastic chuck base 710 are provided on the elastic chuck base 710, and the number of the through holes 7101 is two or more, the through holes 7101 are arranged at intervals around the circumference of the elastic chuck 71, the specific number is set as required, in the present embodiment, the number of the through holes 7101 is 4, and the through holes are arranged at the same angle in the circumference; as for a specific structure of the passing hole 7101, it is a long hole structure arranged in the axial direction of the hollow rotary main shaft in the long axis direction. On the cartridge housing 70, at a position corresponding to each passing hole 7101, there is provided an attaching hole 708 penetrating the sidewall thereof.

The fixed pushing cone 81 comprises a cone part 810, a fixed connecting sliding block part 811 extending outwards from the outer edge of the cone part 810 along the radial direction, and a sleeving pipe part 812 extending from the bottom surface of the cone part 810 along the axial direction; the sleeving pipe portion 812 is rotatably sleeved in the front end portion of the tubular outer pull rod 60, so that the axial movement of the tubular outer pull rod 60 can be guided; the fastening slider 811 passes through the aforementioned through hole 7101 and is slidable relative to the through hole 7101 in the axial direction of the hollow rotary spindle 3; during assembly, the fixed thrust cone 81 is fixedly mounted on the collet sleeve 70 by the bolt 16 passing through the fastening hole 708 engaging with the threaded hole provided on the fastening slider portion 811.

As shown in fig. 16, the tubular outer link 60 includes a front tubular portion 61 and a rear thin tubular portion 62 connected by a sheathing and screw structure. Wherein, the front tubular part 61 comprises a small-diameter tube part 63 with the same diameter as the rear thin tubular part 62, and a large-diameter tube part 64 fixedly connected with the front end part of the small-diameter tube part 63; the rear thin tubular part 62 and the small-diameter tube part 63 are connected in a sleeved mode, the hole sections at the end parts of the rear thin tubular part 62 and the small-diameter tube part 63 are provided with a clamping inner shoulder 6208 and a clamping inner shoulder 6308 at the sleeved connection position, a first guide sleeve 17 sleeved outside the inner pull rod 90 is tightly pressed at the sleeved connection position of the rear thin tubular part and the small-diameter tube part, and two end faces of the first guide sleeve 17 correspondingly abut against one clamping inner shoulder to guide the movement of the inner pull rod 90; a second guide sleeve 18 is sleeved between the sleeved pipe portion 812 and the large-diameter pipe portion 64, and the specific installation structure is that a first inner shoulder 640 and a first snap spring groove 641 are formed in the large-diameter pipe portion 64; one end surface of the second guide sleeve 18 is clamped against the first inner shoulder 640, and the other end surface is clamped against the first snap spring 642 clamped in the first snap spring groove 641, so as to guide the axial movement of the tubular outer link 60. A second inner shoulder 630 and a second snap spring groove 631 are provided at the end of the small-diameter tube portion 63 connected to the large-diameter tube portion 64, and the large-diameter opening of the second inner shoulder 630 faces the large-diameter tube portion 64, so that the third guide sleeve 19 and the snap spring 635 are fixedly mounted; a third guide sleeve 19 is fitted between the inner link 90 and the small-diameter tube portion 63, one end surface of the third guide sleeve 19 is clamped against the second inner shoulder 630, and the other end surface is clamped against the second snap spring 635 clamped in the second snap spring groove 631.

In this embodiment, both ends of the inner pull rod 90 are provided with external threads; after the screw hole arranged on the movable pushing cone 82 is screwed with the external thread arranged on the front end part of the inner pull rod 90, the locking nut 15 is used for locking; after the internal thread arranged at the rear end part of the tubular outer pull rod 60 is screwed with the external thread arranged at the rear end part of the inner pull rod 90, the locking is carried out by the locking nut 151, the position of the joint of the internal thread and the external thread can be adjusted by changing the screwing depth of threaded connection, the locking is carried out by the locking nut 151 after the adjustment, and the position of the joint of the internal thread and the external thread is adjusted by adopting the matching of a thread structure and the locking nut 152 for the connection relationship between the rear end part of the tubular outer pull rod 6 and the axial piston; namely, the rear end part of the tubular outer pull rod 60 is fixedly connected with the axial piston, and the connecting position of the connecting structure between the tubular outer pull rod 60 and the axial piston can be adjusted and locked; the rear end of the inner pull rod 90 is fixedly connected with the rear end of the tubular outer pull rod 60, and the connecting position of the connecting structure between the inner pull rod and the tubular outer pull rod is adjustable and can be locked on the inner pull rod 90. Therefore, in the working process, the axial piston of the hollow rotary oil cylinder 5 is fixedly connected with the rear end parts of the tubular outer pull rod 60 and the tubular inner pull rod 90, so that the inner clamping action of the tube outer clamping mechanism 7 and the outer supporting action of the tube inner supporting mechanism 8 can be synchronously driven based on the pull rod mechanism 6.

In addition, a limit inner shoulder 480 is arranged at the inner opening of the front end part of the hollow rotating main shaft 4; the end face 7190 of the connection end part of the elastic chuck 71 and the tubular outer pull rod 60 protrudes outwards relative to the tubular outer pull rod and is matched with the limit inner shoulder 480 to form a backstop limit structure for the backward movement of the tubular outer pull rod 60.

Referring to fig. 18, the process of assembling and debugging the tube clamping mechanism 4 of the spinning machine 1 shown in the above structure includes an assembling step S1 of the tube outside clamping mechanism, a debugging step S2 of the tube outside clamping mechanism, a debugging position releasing step S3, an assembling step S4 of the tube inside supporting mechanism, and a debugging step S5 of the tube inside supporting mechanism; the specific process is as follows:

an assembly step S1 of the external pipe clamp mechanism, namely fixedly mounting an elastic chuck 71 on the front end part of the external tubular pull rod 60 through a thread matching structure; then the chuck sleeve 70 is fixedly mounted on the front end part of the hollow rotating main shaft 4 through a fixing bolt;

a debugging step S2 of the pipe outer clamping mechanism, namely adjusting the connecting position of the connecting position between the tubular outer pull rod 60 and the axial piston of the hollow rotary oil cylinder 5 on the tubular outer pull rod 60 until the hollow rotary oil cylinder 5 is controlled to work to drive the tubular outer pull rod 60 to move backwards to a first preset position, and enabling the elastic chuck 71 to inwards clamp to enable the position of the clamping surface of the elastic chuck to be matched with the outer diameter of a target pipe based on the displacement conversion function of the wedge-shaped surface type radial pushing mechanism between the chuck sleeve 70 and the elastic chuck 71, for example, the outer diameter of the pipe 01 is the same as or slightly smaller than the outer diameter of the pipe 01;

a debugging position releasing step S3, controlling the hollow rotary oil cylinder 5 to drive the tubular outer pull rod 60 to move forwards from the first preset position to the second preset position, so that the elastic chuck 71 is unfolded to be convenient for being installed into the pipe inner support mechanism 8;

step S4 of assembling the pipe internal support mechanism, namely, sleeving the fixed pushing cone 81 outside the inner pull rod 90 through the open type through hole 7101, namely sleeving the sleeving pipe part 812 in the front port of the tubular outer pull rod 60, and fixedly installing the fixed pushing cone 81 on the chuck sleeve 70 through the fixing bolt 16, wherein the front end part of the inner pull rod 90 penetrates through the inner hole formed in the fixed pushing cone 80; and closes the opening through the hole 7101 by fixing a stopper plate 7108 at the opening through the hole 7101 at the cartridge housing 70; then the elastic expansion sleeve 80 is sleeved on the front end part of the inner pull rod 90, and the movable pushing cone 82 is sleeved on the front end part of the inner pull rod 90; then, the movable pushing cone 82 is locked on the front end part of the inner pull rod 90 through the locking bolt 15;

and a step S5 of debugging the pipe internal bracing mechanism, namely adjusting the connecting position of the connecting structure between the internal pull rod 90 and the tubular external pull rod 60 on the internal pull rod 90 until the hollow rotary oil cylinder 5 is controlled to drive the internal pull rod 90 to move backwards to the first preset position, and enabling the position of the supporting surface of the elastic expansion sleeve 80 to be matched with the inner diameter of a target pipe material, for example, the position is equal to the inner diameter of the pipe material 01 or slightly larger than the inner diameter of the pipe material 01, due to the displacement conversion function of the wedge-shaped surface type radial pushing mechanism between the port part of the elastic expansion sleeve 80 and the fixed pushing cone 81 and the movable pushing cone 82.

In the above embodiment, the "fixing" of the fixed thruster cone 81 is configured to keep the axial position fixed during clamping; while the "active" of the active pusher cone 82 is configured to be movable in axial position during clamping, specifically by the push and pull of the drawbar mechanism to effect a change in axial position. The wedge-shaped surface type radial pushing fit structure can be a structure in which one of the two conical surface fit structures is a conical surface and the other is a sliding protrusion structure, and only axial displacement can be converted into radial displacement; the axial displacement is adjustable and can be locked, and the axial position of the connecting part structure on one of the connecting part structures can be adjusted in the debugging process, and the position is locked after the adjustment is completed, so that the assembly debugging process can be better realized.

The two parts can be directly fixedly connected or indirectly connected through a third part, and similarly, the fixed installation is also configured to be directly or indirectly fixed through the third part.

The specific structure of the elastic expansion sleeve 80 is specifically configured to be expanded in the radial direction under the action of the internal supporting force, and when the internal supporting force is removed, the elastic expansion sleeve can be automatically retracted to the original state based on the elastic restoring force, so that not only the integrated structure in the above embodiment can be adopted, but also a split structure can be adopted, and like the expansion sleeve structure disclosed in the prior art documents such as the patent document with the publication number of CN 204585021U, an elastic ring is sleeved on the outer side of the expansion sleeve structure, the internal supporting force is inwardly reduced, and an internal supporting spring ring is used for keeping the whole complete shape and can not fall off; in addition, the metal supporting block embedded in the elastic sleeve can be used for construction, so that the retraction effect is realized based on the elastic sleeve, and the hard supporting effect is realized based on the metal supporting block.

In the above-described embodiment, the "inner link" constitutes the "first connecting portion" of the present embodiment, and the "tubular outer link" constitutes the "second connecting portion" of the present embodiment; in addition to the coaxial arrangement described above, in which the outer tubular structure and the inner rod are nested within each other, other arrangements may be used, for example, in which the two are not nested but are parallel to each other. In the above embodiment, the connecting structure between the pull rod structure and other components is adjustable to facilitate assembly, so that the precision of machining and manufacturing of the components is reduced, and the adjustable structure can be arranged through high-precision machining without configuration.

Claims (10)

1. A material clamping machine head is used for clamping a pipe; the material clamping machine head comprises a main shaft box, a hollow rotating main shaft, a pipe clamping mechanism and a hollow rotary oil cylinder, wherein the hollow rotating main shaft is rotatably arranged on the main shaft box; an axial piston of the hollow rotary oil cylinder drives the pipe clamping mechanism to open and close through a pull rod mechanism, and the pull rod mechanism penetrates through a hollow inner cavity of the hollow rotary main shaft; the method is characterized in that:

the pipe clamping mechanism is an external-clamping and internal-supporting pipe clamping mechanism, and the external-clamping and internal-supporting pipe clamping mechanism comprises an external pipe clamping mechanism and an internal pipe supporting mechanism; the pipe outer clamping mechanism comprises a chuck sleeve and an elastic chuck which forms a wedge-shaped surface type radial pushing fit with the chuck sleeve; the elastic chuck is sleeved in the chuck sleeve, and the chuck sleeve is fixedly arranged on the front end part of the hollow rotating main shaft;

the pipe internal support mechanism comprises an elastic expansion sleeve, and a fixed pushing cone and a movable pushing cone which are matched with the elastic expansion sleeve; the fixed pushing cone is fixedly arranged on the front end part of the hollow rotating main shaft, and the pointed cone end part of the fixed pushing cone is sleeved on the inner side port of the elastic expansion sleeve; the tip end of the movable pushing cone is sleeved on the outer port of the elastic expansion sleeve;

the front end part of the pull rod mechanism comprises a first connecting part and a second connecting part, and the first connecting part is fixedly connected with the movable pushing cone after penetrating through an inner hole formed in the fixed pushing cone; the elastic chuck is fixedly arranged on the second connecting part, so that the hollow rotary oil cylinder can synchronously drive the inner clamping action of the pipe outer clamping mechanism and the outer supporting action of the pipe inner supporting mechanism based on the pull rod mechanism.

2. The clamping head as claimed in claim 1, characterized in that:

the pull rod mechanism comprises an inner pull rod and a tubular outer pull rod sleeved outside the inner pull rod; the front end part of the tubular outer pull rod forms the second connecting part; the front end part of the inner pull rod forms the first connecting part; the rear end parts of the tubular outer pull rod and the tubular inner pull rod are fixedly connected with the axial piston.

3. A clamping head according to claim 2, characterized in that, in the axial direction of said hollow rotating main shaft:

the rear end part of the tubular outer pull rod is fixedly connected with the axial piston, and the connecting position of a connecting structure between the tubular outer pull rod and the tubular outer pull rod on the axial direction of the tubular outer pull rod is adjustable and can be locked; the rear end part of the inner pull rod is fixedly connected with the rear end part of the tubular outer pull rod, and the connecting position of the connecting structure between the inner pull rod and the tubular outer pull rod on the inner pull rod is adjustable and can be locked in the axial direction of the inner pull rod.

4. A clip head as defined in claim 3, wherein:

the fixed mounting position of the fixed pushing cone on the front end part of the hollow rotating main shaft can be adjusted and locked; and/or the fixed mounting position of the movable pushing cone on the front end part of the inner pull rod can be adjusted and locked.

5. A clamping head according to claim 4, characterized in that:

the two end parts of the inner pull rod are both in external thread structures; the screw hole arranged on the movable pushing cone is screwed with the external thread arranged on the front end part of the inner pull rod and is locked by a locking nut; and after the internal thread arranged at the rear end part of the tubular outer pull rod is screwed with the external thread arranged on the rear end part of the inner pull rod, the tubular outer pull rod is locked by a locking nut.

6. A clamping head according to any one of claims 3 to 5, characterised in that:

the elastic chuck is provided with a through hole penetrating through the side wall of the elastic chuck, and the fixed pushing cone is fixedly arranged on the chuck sleeve by fastening a connecting piece; the through hole is a long hole structure with a long shaft arranged along the axial direction of the hollow rotating main shaft, so that the elastic chuck can move relative to the fastening connecting piece in the axial direction.

7. A clamping head according to claim 6, characterized in that:

the number of the through holes is more than two, and the through holes are arranged around the periphery of the elastic chuck at intervals;

the fixed pushing cone comprises a cone body part, a fixed connecting sliding block part and a sleeved pipe part, wherein the fixed connecting sliding block part extends outwards from the outer edge of the cone body part along the radial direction, and the sleeved pipe part extends from the bottom surface of the cone body part along the axial direction; the sleeving pipe part can be sleeved in the front end part of the tubular outer pull rod in a relatively rotatable manner, and the chuck sleeve is provided with a fixing and connecting hole; the fixedly-connected sliding block part penetrates through the long hole structure and can slide relative to the long hole structure in the axial direction of the hollow rotating main shaft; the bolt penetrating through the fixed connecting hole is matched with the screw hole arranged on the fixed connecting slide block part, so that the fixed pushing cone is fixedly arranged on the chuck sleeve.

8. A clip head as claimed in any one of claims 2 to 5, characterized in that:

the fixed pushing cone comprises a cone body part and a sleeving pipe part formed by extending from the bottom surface of the cone body part along the axial direction; the tubular outer pull rod comprises a front tubular part and a rear thin tubular part; the front tubular part comprises a small-diameter tube part with the same diameter as the rear thin tubular part and a large-diameter tube part fixedly connected to the front end part of the small-diameter tube part;

the rear thin tubular part is connected with the small-diameter tube part in a sleeved mode, and a first guide sleeve sleeved outside the inner pull rod is tightly pressed at the sleeved connection position of the rear thin tubular part and the small-diameter tube part;

a second guide sleeve is sleeved between the sleeving pipe part and the large-diameter pipe part, and a first inner shoulder and a first clamp spring groove are formed in the large-diameter pipe part; one end face of the second guide sleeve is clamped and pressed on the first inner shoulder, and the other end face of the second guide sleeve is clamped and pressed by a clamp spring clamped in the first clamp spring groove.

9. A clamping head according to any one of claims 1 to 5, characterized in that:

the elastic chuck comprises an elastic chuck seat and a clamping piece;

the elastic clamping head seat is of a multi-petal structure, and more than one clamping piece is detachably and fixedly connected to the inner side of each petal structure.

10. A spinning system comprises a spinning machine and a pipe feeding device; the spinning machine comprises a rack, and a material clamping machine head and a spinning machine head which are arranged on the rack; the method is characterized in that:

the clamping machine head is as claimed in any one of claims 1 to 9, and the pipe feeding device is used for feeding a pipe to a pipe clamping mechanism on the clamping machine head.

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