CN212190642U

CN212190642U - Clamping mechanism for extrusion forming equipment

Info

Publication number: CN212190642U
Application number: CN202020665251.2U
Authority: CN
Inventors: 王双飞; 唐良勇; 吴海东
Original assignee: Sichuan Zhongzi Technology Co ltd
Current assignee: Sichuan Zhongzi Technology Co ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-12-22
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses a clamping mechanism for extrusion equipment. The clamping mechanism comprises two clamping arms with the same structure, and each clamping arm is provided with a half hole for fixing a half female die of a clamped workpiece; the two clamping arms are driven by the same clamping oil cylinder to form an equal-arm crank-link mechanism to realize opening and closing. The clamping mechanism of the utility model realizes automatic die closing and clamping after placing the pipe workpiece, and solves the problem that the work load of manual die closing is large because the clamp needs to be manually moved after placing the pipe workpiece in the prior art; the clamping mechanism is self-adaptive to the individual difference of the outer diameter sizes of workpieces with the same specification in a certain range, and the problem of clearance or interference caused by the fact that a half clamping die cannot be self-adaptive to the individual difference of the workpieces in the prior art is solved, so that the problem that the sizes of the workpieces are out of limit due to internal expansion force when the workpieces are extruded when clamping deformed workpieces and clamping untightened workpieces is avoided, and the quality and the qualification rate of product processing are improved.

Description

Clamping mechanism for extrusion forming equipment

Technical Field

The utility model belongs to the technical field of mechanical design makes, especially, belong to extrusion processing machinery manufacturing and designing technical field, in particular to clamping mechanism of no flaring conduit coupling spare extrusion equipment.

Background

In the prior art, the connection of the conduit connector is generally performed by enclosing a compressible elastic material having a certain volume, such as a polyurethane material, in a processing space, extruding the compressible elastic material to an incompressible stage, locally extruding the conduit through the deformation of the polyurethane to generate plastic deformation, and extruding the plastic deformation into an inner annular groove sleeved on a guide sleeve on the conduit, so that the conduit and the guide sleeve are tightly connected.

Chinese patent document CN 208930714U discloses an extrusion molding machine for flareless conduit connectors, wherein an expansion mechanism of the extrusion molding machine includes a tie rod assembly, a die assembly, and a clamp mechanism; the pull rod assembly comprises a pull rod and a rubber sleeve sleeved on the pull rod, an annular convex edge is arranged at one end of the pull rod and used for blocking the rubber sleeve, and a movable bushing is arranged on the pull rod and positioned on one side, far away from the convex edge, of the rubber sleeve; the mould assembly comprises two half clamping moulds which can be mutually buckled, a mould guide sleeve and a positioning sleeve, wherein the inner side of each half clamping mould is fixedly provided with the pipe sleeve, a guide pipe can be inserted into the pipe sleeve, the positioning sleeve is arranged in a cavity of each half clamping mould, the mould guide sleeve is arranged at the end part of the main oil cylinder, the positioning sleeve is used for being sleeved on the outer side of the movable lining, and the mould guide sleeve is used for supporting the positioning sleeve and the movable lining; the clamping mechanism is used for clamping the mould assembly, and the method has the following obvious defects in the concrete realization: this compound die mode locking mode relies on the matched molds of fitting surface about it for upper and lower clamp to adopt manual compound die, pneumatic mode locking structure, the mould subassembly includes: the semi-clamping die, the die guide sleeve and the positioning sleeve further comprise movable bushings; the assembly structure is complex, the positioning sleeve is of a full circular ring structure and is opened and closed and fixed by the half clamping die, during actual operation, operation for fixing a workpiece is very complicated, safety is high, the positioning sleeve, the movable bushing and the half clamping die are closed and fixed, accuracy requirements cannot be met frequently, the die is replaced more complexly, and working efficiency is low.

Disclosure of Invention

The utility model discloses a clamping mechanism for extrusion equipment according to prior art's not enough. The utility model aims at providing one kind: the die is automatically closed, the workload of workers is reduced, and the safety is improved; the forming die and the clamping mechanism are of a detachable and replaceable integrated structure, the size difference of the combined individual structures of workpieces with the same specification can be self-adapted, and the processing quality of the extruded conduit processed parts is improved; meanwhile, the clamping mechanism is more reasonable in mechanism composition and structure and better in performance and safety.

The utility model discloses a following technical scheme realizes:

a clamping mechanism for extrusion equipment, including the hydraulic system who provides power for clamping mechanism, its characterized in that: the clamping mechanism comprises two clamping arms with the same structure, and each clamping arm is provided with a half hole for fixing a half female die of a clamped workpiece; the two clamping arms are driven by the same clamping oil cylinder to form an equal-arm crank-link mechanism to realize opening and closing.

The equal-arm crank connecting rod mechanism comprises a clamping oil cylinder, an installation hanging frame, an elbow joint, a connecting rod, an installation seat and a clamping arm; the clamping oil cylinder is fixedly arranged on the mounting rack, and the mounting rack is fixed below the working platform; one end of the elbow joint is fixedly connected with a piston shaft of the clamping oil cylinder, and the other end of the elbow joint is provided with a shaft hole; the mounting seat is fixed below the working platform, and a shaft hole is formed in the side face of the mounting seat; each clamping arm is provided with two groups of shaft holes, and the two groups of shaft holes and the half holes are arranged in a triangular mode; the middle shaft hole of each clamping arm is hinged with the shaft hole of the mounting seat, and the lower shaft holes are fixedly connected with the same elbow joint through respective connecting rods to form an equal-arm crank connecting rod mechanism.

The semi-cavity die is of a symmetrical structure formed by combining two semi-circular rings, and the two semi-circular rings are detachably mounted and fixed in the semi-holes of the clamping arms respectively and used for clamping and fixing a workpiece in a closed mode.

Furthermore, the joint surfaces between the two semicircular rings of the half-cavity die are both planes, the maximum radial radius of the planes is smaller than that of the half-cavity die, and when the two semicircular rings are combined and clamped to fix the conduit connecting piece, a die-assembling gap is formed at the joint part.

The front end of the half female die is provided with a half female die cavity matched with the outer diameter of a workpiece, and the rear end of the half female die is also provided with a clamping section matched with the outer diameter of the workpiece to realize clamping and fixing.

The clamping mechanism of the utility model realizes automatic die closing and clamping after placing the pipe workpiece, and solves the problem that the work load of manual die closing is large because the clamp needs to be manually moved after placing the pipe workpiece in the prior art; the utility model discloses clamping mechanism is individual difference that the same specification work piece external diameter of self-adaptation exists in the certain limit, has solved half clamp mould of prior art and can not be with the clearance or the interference problem that this kind of individual difference self-adaptation of work piece arouses to the work piece is transfinited because of the problem that interior bulging force acts on the size transfinites when avoiding pressing from both sides to hinder when pressing from both sides the work piece and pressing from both sides the work piece not tight, has promoted the quality and the qualification rate of product processing.

Drawings

FIG. 1 is a schematic view of the clamping mechanism arrangement system of the present invention;

FIG. 2 is a schematic perspective view of the clamping mechanism of the present invention;

FIG. 3 is a schematic structural view of the open state of the clamping mechanism of the present invention;

fig. 4 is a schematic structural view of the clamping mechanism of the present invention in a closed state;

FIG. 5 is a schematic cross-sectional view of the structure of the die half, anvil and tie rod assembly;

FIG. 6 is a schematic view of the clamp arm and expansion mechanism configuration;

FIG. 7 is a schematic view of a cavity half construction;

fig. 8 is a sectional view of the anvil.

In the figure, 1 is a cabinet, 2 is a hydraulic system, 3 is a clamping mechanism, 35 is a pin shaft, 38 is a clamping arm, 4 is a stretching mechanism, 5 is an operation panel, and 6 is a working platform;

31 is a clamping cylinder, 32 is a mounting hanger, 33 is a toggle joint, 34 is a connecting rod, 35 is a pin shaft, 36 is a nozzle, 37 is a mounting seat, 38 is a clamping arm, 461 is an adapter, 462 is an anvil, 462a is an anvil cavity, 462b is a cylindrical cavity, 463 is a half-female die, 463a is a half-female die left cavity, 463b is a half-female die right cavity, 464 is a pull rod assembly, 465 is a workpiece combination, and 47 is an anvil seat.

Detailed Description

The present invention is further described below in conjunction with the following detailed description, which is intended to further illustrate the principles of the invention and is not intended to limit the invention in any way, but is equivalent or analogous to the present invention without departing from its scope.

With reference to the attached drawings.

The following description will be made by taking an extrusion molding apparatus including the clamping mechanism of the present invention as an example.

The molding equipment comprises a cabinet 1, a hydraulic system 2, a clamping mechanism 3, a stretching mechanism 4, an operation panel 5 and a working platform 6.

An electric cabinet 11 and a hydraulic system 2 are also arranged in the frame of the cabinet 1; the electric cabinet 11 and the hydraulic system 2 are both fixed in the frame of the cabinet 1 through screws or bolts; when needed, the electric control box 11 and the hydraulic system 2 can be taken out from the frame of the cabinet 1 during maintenance.

The stretching mechanism 4 is arranged on the working platform 6, the clamping mechanism 3 and the stretching mechanism 4 are matched to operate, the part is arranged on the working platform 6, and the driving part of the clamping mechanism 3 and the hydraulic system 2 are matched to be arranged in a cabinet frame below the working platform 6.

The stretching mechanism 4 is arranged on the upper surface of the working platform 6 in parallel along the axial direction, the operation panel 5 is arranged on the working platform 6, the touch screen and the physical control button are arranged on the operation panel 5, and the axial line of the clamping mechanism 3 and the axial line of the stretching mechanism 4 are mutually perpendicular on the same plane.

The clamping mechanism 3 comprises a clamping cylinder 31, a mounting hanger 32, a toggle joint 33, a connecting rod 34, a pin shaft 35, a nozzle 36, a mounting seat 37 and a clamping arm 38. The clamping cylinder 31 is arranged on a horizontal supporting plate fixed on the mounting rack 32, the mounting rack 32 is provided with two vertical plates vertical to the horizontal supporting plate, the top end of each vertical plate is also provided with a horizontal fixing plate, the fixing plate of the mounting rack 32 is fixedly connected with the lower surface of the working platform 6, one end of the elbow joint 33 is fixedly connected with a piston shaft of the clamping cylinder 31, the other end of the elbow joint is provided with a shaft hole, the mounting seat 37 is fixed on the lower surface of the working platform 6, the side surface of the mounting seat 37 is provided with an axle hole, the middle position of the clamping arm 38 is provided with an axle hole corresponding to the axle hole, one end of the clamping arm is provided with another axle hole, a half hole is arranged at the other end, the shaft hole in the middle of the clamping arm 38 is hinged with the shaft hole of the mounting seat 37 through a pin shaft 35, both ends of the connecting rod 34 are provided with shaft holes, the shaft hole at one end is hinged to the shaft hole at the lower end of the clamping arm 38 through a pin shaft 35, and the shaft hole at the other end is hinged to the shaft hole of the toggle joint 33 through the pin shaft 35.

In order to solve the problem of large workload of manual mold clamping of manually-moved clamps and the problem of size difference of individual structures of workpiece combinations of self-adaptive same specification, the flaring-free guide pipe connecting piece extrusion molding equipment of the invention adopts a hydraulic power mold clamping working mode through a clamping mechanism 3 as shown in figures 1, 2, 3 and 4, the clamping mechanism 3 is arranged on a working platform 6, the working characteristic is that a clamping arm 38 can rotate around the axis of a pin shaft 35, the working process is that after an operator places a workpiece combination 465 in an inner anvil mold cavity 462a of an anvil 462, a corresponding control button of a control panel 5 or a control button of a touch screen is pressed down, an electric control system controls a piston of a clamping oil cylinder 31 to move upwards, a moment is applied to the clamping arm 38 through a toggle joint 33 and a hinged connecting rod 34 which are rigidly connected with the clamping oil cylinder, the clamping arm 38 rotates around the pin shaft 35, and the automatic folding of the clamping arm 38 which is arranged in pairs and a half female mold 463 which is arranged in a half, when a left half cavity 463a and a right half cavity 463b of a half cavity die 463 in a closed half cavity die 463 meet the blocking of an outer diameter outline entity of a pipe sleeve 4651 in a workpiece combination 465, a reaction force is generated to balance the clamping force of a clamping mechanism 3 and indirectly balance the thrust of a clamping oil cylinder 31 controlled by a system, at the moment, the half cavity die 463 and the workpiece combination 465 are maintained in a clamping balance state, and because two halves of a clamping arm 38 and the half cavity die 463 which are configured in pair are in a coaxial state and a specially-arranged die closing gap is reserved on a combining surface of the half cavity die 463, the position of the clamping balance state is not influenced by the structural size of the workpiece combination 465, the difference of the structural size of the workpiece combination 465 can be self-adapted in the range of the die closing gap, and the half cavity die 463 can.

As shown in fig. 1 and fig. 2, the clamping mechanism of the present invention uses a hydraulic power mold closing operation, and its operation is characterized in that the clamping arm 38 can rotate around the axis of the pin 35, and its operation process is that the piston of the clamping cylinder 31 moves upwards under the hydraulic action, and applies a moment to the clamping arm 38 through the toggle joint rigidly connected to the piston and the hinged connecting rod 35, so that the clamping arm 38 rotates around the pin 35, and the clamping arm 38 configured in pairs automatically closes up, when the inner cavity of the clamping arm 38 meets the block of the inner diameter contour entity of the workpiece, a reaction force is generated to balance the clamping force of the clamping mechanism, and indirectly balance the thrust of the clamping cylinder 31 controlled by the system, and at this time, the clamping arm 38 is maintained in a clamping balance state, because when the two halves of the clamping arm 38 configured in pairs are in a coaxial state, there is a specially set mold closing gap, so the position of the clamping balance state is not affected by the size of the workpiece combination structure, the self-adaptive flaring-free conduit connector can adapt to the difference of the structure size of the flaring-free conduit connector within the range of the gap, and can clamp the flaring-free conduit connector through internal parts of the inner cavity of the clamping arm all the time.

Claims

1. A clamping mechanism for an extrusion forming apparatus, comprising a hydraulic system for powering the clamping mechanism, characterized in that: the clamping mechanism comprises two clamping arms with the same structure, and each clamping arm is provided with a half hole for fixing a half female die of a clamped workpiece; the two clamping arms are driven by the same clamping oil cylinder to form an equal-arm crank-link mechanism to realize opening and closing.

2. The clamping mechanism for an extrusion molding apparatus as set forth in claim 1, wherein: the equal-arm crank connecting rod mechanism comprises a clamping oil cylinder, an installation hanging frame, an elbow joint, a connecting rod, an installation seat and a clamping arm; the clamping oil cylinder is fixedly arranged on the mounting rack, and the mounting rack is fixed below the working platform; one end of the elbow joint is fixedly connected with a piston shaft of the clamping oil cylinder, and the other end of the elbow joint is provided with a shaft hole; the mounting seat is fixed below the working platform, and a shaft hole is formed in the side face of the mounting seat; each clamping arm is provided with two groups of shaft holes, and the two groups of shaft holes and the half holes are arranged in a triangular mode; the middle shaft hole of each clamping arm is hinged with the shaft hole of the mounting seat, and the lower shaft holes are fixedly connected with the same elbow joint through respective connecting rods to form an equal-arm crank connecting rod mechanism.

3. The clamping mechanism for an extrusion molding apparatus as set forth in claim 2, wherein: the semi-cavity die is of a symmetrical structure formed by combining two semi-circular rings, and the two semi-circular rings are detachably mounted and fixed in the semi-holes of the clamping arms respectively and used for clamping and fixing a workpiece in a closed mode.

4. The clamping mechanism for extrusion molding apparatuses as claimed in claim 1, 2 or 3, wherein: the joint surfaces between the two semicircular rings of the half-cavity die are both planes, the maximum radial radius of the planes is smaller than that of the half-cavity die, and when the two semicircular rings are combined and clamped to fix the conduit connecting piece, a die-closing gap is formed at the joint part.

5. The clamping mechanism for an extrusion molding apparatus as set forth in claim 2, wherein: the front end of the half female die is provided with a half female die cavity matched with the outer diameter of a workpiece, and the rear end of the half female die is also provided with a clamping section matched with the outer diameter of the workpiece to realize clamping and fixing.