Hard pipe cutting equipment

• US 6,557,227 B2
• Filed: 07/09/2001
• Issued: 05/06/2003
• Est. Priority Date: 07/09/2001
• Status: Expired due to Fees

• Current Assignee: NAN YA Plastics Corporation
• Original Assignee: NAN YA Plastics Corporation
• Inventors: Chang, Shin-Fa
• Primary Examiner(s): BRIGGS, WILLIAM R
• Application Number:
  US09/900,131
• Publication Number:
  US 20030005562A1
• Time in Patent Office: 666 Days
• Field of Search: 29/33.T, 29/33.D, 295/66, 82/46, 82/59, 821/01, 821/13, 409/139, 409/138, 409/175, 409/203, 300/97
• US Class Current: 29/33.00T
• CPC Class Codes: B23B 2260/116 Rollers or rolls
• CPC Class Codes: B23B 5/16 for bevelling, chamfering, or deburring the ends of bars or tubes
• CPC Class Codes: B23D 21/006 and sealing, crushing or chamfering the tubes
• CPC Class Codes: B23D 21/04 Tube-severing machines with rotating tool-carrier
• CPC Class Codes: B26D 2007/013 the work being tubes, rods or logs
• CPC Class Codes: B26D 3/16 Cutting rods or tubes transversely cutting tubes longitudinally B26D3/001
• CPC Class Codes: B26D 3/166 Trimming tube-ends
• CPC Class Codes: B26D 7/02 with clamping means B26D7/018 takes precedence
• CPC Class Codes: B26D 7/06 Arrangements for feeding or delivering work of other than sheet, web, or filamentary form feeding or discharging sheets, webs, or filaments B65H
• CPC Class Codes: Y10T 29/5147 including composite tool
• CPC Class Codes: Y10T 29/5199 Work on tubes
• CPC Class Codes: Y10T 409/304144 Means to trim edge
• CPC Class Codes: Y10T 409/3042 Means to remove scale or raised surface imperfection
• CPC Class Codes: Y10T 409/306048 with means to advance work or product
• CPC Class Codes: Y10T 82/16229 Interrelated means for tool infeed and circumrotation
• CPC Class Codes: Y10T 82/16967 with means to support and/or rotate work

Abstract

The present invention relates to a novel cutting equipment, which automatically cuts hard plastic pipes produced from an extruder, having a table, an input V shape leading wheel, an input fixing clamp apparatus mechanism, a cutting mechanism, a bearing transmission mechanism, an output fixing clamp apparatus mechanism, a V shape leading plate, a leading wheel, a cuttings collector, and an electric control system, which are assembled to a novel means of a hard pipe cutting machine.

Claims

1. A cutting apparatus for variable diameter pipe, comprising:

an input clamp mechanism and an output clamp mechanism, each of the input and output clamp mechanisms comprising a fixing seat, a rotating disc, and a driving cylinder, each fixing seat having a plurality of sliding tracks, each sliding track housing a sliding seat and a rolling wheel that moves the corresponding sliding seat along a sliding axis of the respective sliding track, each sliding seat having a clamp at one end for gripping the pipe, each of the driving cylinders drives the movement of the corresponding rotating disc, the movement of each rotating disc drives the movement of the corresponding set of rolling wheels, the movement of each set of rolling wheels drives the movement of the corresponding set of sliding seats, and the movement of each set of sliding seats moves the corresponding set of clamps radially inward toward or outward from the pipe in accordance with a drive direction of the corresponding driving cylinder so that the corresponding set of clamps may concentrically grip and release pipes of variable diameters;

a cutting disc for cutting and chamfering the pipe, the cutting disc comprising a chamfering sliding track, a chamfering sliding seat that slides within the chamfering sliding track along a radial direction of the cutting disc, a chamfering blade attached to an end of the chamfering blade seat, a cutting sliding track, a cutting sliding seat that slides within the cutting sliding track along the radial direction of the cutting disc, and a cutting blade attached to an end of the cutting blade seat;

a cutting mechanism disposed between the input and output clamp mechanisms, the cutting mechanism comprising a blade-feeding cylinder, a blade-feeding disc, a plurality of twin-slope guide blocks, and the cutting disc, the cutting disc interconnected with the.blade-feeding disc through the plurality of twin-slope guide blocks and having a common axis of rotation with the blade-feeding disc, the blade-feeding cylinder displaces the blade-feeding disc relative to the cutting disc along the common axis of rotation, the relative displacement of the blade-feeding disc and the cutting disc moves the cutting sliding seat within the cutting sliding track in accordance with a slope of the twin-slope guide blocks, the relative displacement of the blade-feeding disc and the cutting disc moves the chamfering sliding seat within the chamfering sliding track in accordance with the slope of the twin-slope guide blocks, the twin-slope guide blocks move the cutting sliding seat and the chamfering sliding seat inwardly along the radial axis of the cutting disc toward the rotational axis of the rotating disc as the distance between the cutting disc and the blade-feeding disc decreases, the twin-slope guide blocks move the cutting sliding seat and the chamfering sliding seat outwardly along the radial axis of the cutting disc away from the rotational axis of the rotating disc as the distance between the cutting disc and the blade-feeding disc increases, the blade-feeding cylinder displaces the cutting disc and the blade-feeding disc relative to one another to move the cutting and chamfering blades into and out of contact with the variable diameter pipe;

a transmission mechanism, comprising a variable frequency driving motor, a bottom gear sprocket, a top gear sprocket interconnected with the blade-feeding disc and having an axis of rotation in common with the blade-feeding disc and the cutting disc, and a chain that interconnects the bottom and top gear sprockets, the variable frequency driving motor drives the bottom gear sprocket to rotate, the rotation of the bottom gear sprocket drives the rotation of the chain around the bottom and top gear sprockets and thereby drives a common rotation of the top gear sprocket, the blade-feeding disc, and the cutting disc for circumferentially cutting and chamfering the pipe;

a cuttings and dust collector that encloses the cutting mechanism and collects material removed from the pipe by the cutting mechanism;

a sliding table that interconnects the input and output clamps, the cutting mechanism, and the transmission mechanism, the sliding table slides along a pipe-feeding axis at a pipe-feeding rate so that the input and output clamps may securely grip the pipe as the cutting mechanism cuts and chamfers the pipe; and

a control circuit that controls the operation of the input and output clamps, the cutting mechanism, the transmission mechanism, and the sliding table in accordance with a detected length of pipe received by the cutting apparatus.