GB840678A - Machine tool control mechanism - Google Patents

Machine tool control mechanism

Info

Publication number
GB840678A
GB840678A GB12729/57A GB1272957A GB840678A GB 840678 A GB840678 A GB 840678A GB 12729/57 A GB12729/57 A GB 12729/57A GB 1272957 A GB1272957 A GB 1272957A GB 840678 A GB840678 A GB 840678A
Authority
GB
United Kingdom
Prior art keywords
grinding
piston
movement
head
lever
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB12729/57A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bryant Grinder Corp
Bryant Chucking Grinder Co
Original Assignee
Bryant Grinder Corp
Bryant Chucking Grinder Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bryant Grinder Corp, Bryant Chucking Grinder Co filed Critical Bryant Grinder Corp
Publication of GB840678A publication Critical patent/GB840678A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/02—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
    • B24B47/06—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables by liquid or gas pressure only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/02—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
    • B24B47/08—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables by mechanical gearing combined with fluid systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/046—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed depending on the position of the working member
    • F15B11/048—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed depending on the position of the working member with deceleration control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/325—Directional control characterised by the type of actuation mechanically actuated by an output member of the circuit
    • F15B2211/326—Directional control characterised by the type of actuation mechanically actuated by an output member of the circuit with follow-up action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F15B2211/7054—Having equal piston areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/755—Control of acceleration or deceleration of the output member

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

840,678. Grinding. BRYANT CHUCKING GRINDER CO. April 18, 1957 [April 23, 1956], No. 12729 /57. Class 60. [Also in Group XXIX] Means for reciprocating a machine tool part, such as the grinding head of an internal grinding machine, comprises a servo-piston 44, Fig. 11, connected by a rod 46 to the grinding head and controlled by a piston valve 54 which is operated by a lever 82 and has a feed-back connection, consisting of a parallelogram linkage 72, 74, 76, 78 supported by a leaf spring 58, with the piston 44. The arrangement is such that rotation of an eccentric 86 from the position shown causes the lever 82 to rock in a clockwise sense about a pivot 84 and, due to engagement of the lower end of the lever with a point 80 of the parallelogram linkage, to cause leftward motion of the piston valve 54 to initiate movement in the same direction of the piston 44, such movement advancing the grinding head into the bore of the workpiece. The motion of the piston 44 is transmitted to the lever 72 which pivots about its connection with the link 76 to return the valve 54 to its neutral position. The piston 44 may be held in its advanced position before the cam 86 is rotated to cause its return movement, and whilst it is so held, or at any other time, a short stroke reciprocatory movement may be imparted to it by a rotating cam 96 into contact with which a follower 94 connected to the pivot 84 may be brought upon operation of an arm 98 by, e.g. a hydraulic cylinder. In a modification, the eccentric 86 is replaced by a cam of more complex shape which, by intermittent movement, provides firstly an advance movement of the grinding head for a rough grinding phase, then a comparatively slow withdrawal of the head to a position in which the grinding wheel is dressed by a diamond tool, after which the head is again advanced for the finish grinding phase and finally withdrawn completely. The grinding head consists of a tubular member 24, Fig. 3, having trunnions 28 mounted in preloaded ball bearings 22 in a housing 20, and a tubular member 30 which may reciprocate in the member 24 on preloaded balls 32, the member 30 carrying the grinding wheel T which is mounted on a spindle 18 driven at high rotational speed by e.g. an electric or hydraulic motor. The member 24, which is supported at its end remote from the grinding wheel by a vertically adjustable bar with ball slide members 38, is laterally adjustable for feed along the axis of the trunnions.
GB12729/57A 1956-04-23 1957-04-18 Machine tool control mechanism Expired GB840678A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US840678XA 1956-04-23 1956-04-23

Publications (1)

Publication Number Publication Date
GB840678A true GB840678A (en) 1960-07-06

Family

ID=22182683

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12729/57A Expired GB840678A (en) 1956-04-23 1957-04-18 Machine tool control mechanism

Country Status (1)

Country Link
GB (1) GB840678A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201012A (en) * 1987-02-12 1988-08-17 Hans Schoen An electrohydraulic control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201012A (en) * 1987-02-12 1988-08-17 Hans Schoen An electrohydraulic control system
GB2201012B (en) * 1987-02-12 1990-09-26 Hans Schoen An electrohydraulic control system

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