SU1313601A1 - Hydraulic duplicating threading lathe - Google Patents

Abstract

The invention relates to mechanical engineering and can be used for automatic multi-pass cutting of large threads. The purpose of the invention, the expansion of technological capabilities, is achieved due to the possibility of cutting single- and multi-thread threads with a consistent expansion of the threaded grooves. In a hydromachine threading machine, drive 1 is kinematically connected J7 37 37

Description

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with copier 4, with a helical groove 5 of which the probe 6 of the following hydraulic system interacts. The machine is equipped with two carriages 9 and 1I. The carriage 11 is placed on the support 12 and has a wedge device with a hydraulic cylinder I3 of the drive. Copier 4 sits on the axially movable axially together with the cam axis 18, which has a drive in the form of a power hydraulic cylinder 20, the rod cavity of which is connected to the hydrocyon

The invention relates to a machine tool industry and can be used for automatic multi-pass cutting of large threads.

The purpose of the invention is the expansion of the technological capabilities of the machine by providing the possibility of cutting single and multiple thread with consistent expansion of the threaded channels.

The drawing shows the proposed machine, the overall appearance.

The machine contains a drive 1 of rotation of the workpiece 2, connected by a gear 3 with a threaded copier 4, whose profile corresponds to the profile of the product. On the outer surface of the copier 4 there is a screw groove 5, with which the probe 6 of the following hydraulic system interacts, including the hydraulic cylinder 7 of the hub, the upper cavity of which is connected to the cavity of the hydraulic cylinder 8 of the wedge carriage 9 moving device 10 with the machining tool 10. placed on an additional cross feed carriage 11 placed on a longitudinal feed support 12 and equipped with a wedge control device with a hydraulic cylinder 13 of the drive. The caliper 12 is mounted on the frame 14 and is equipped with a hydraulic actuator 15 with a spool mechanism 16 with an electromagnetic drive. The inlet channels of the spool mechanism are connected to the program device 17, the outlets are connected to the cavity of the hydraulic cylinder.

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lindrom 13, and without rods - with a shut-off solenoid valve 21 for drainage with two check valves 22 and 25 and a hydraulic cylinder 23 with an adjustable piston stroke. On the slider 35 there is a thread form copier with a drive in the form of a power cylinder 29, the rodless cavity of which is connected to the shut-off solenoid valve 30, two non-return valves 31 and 33 and a hydraulic cylinder 32 with an adjustable piston stroke. 1 il.

I5 and with the lower cavity of the hydraulic cylinder 7 probe. Copier 4 is mounted on an axis 18, having the possibility of axial movement in the supports 19. Axis 18 is connected to

the piston rod of the hydraulic cylinder 20 with a spring-loaded: piston, the rodless cavity of which is connected to the drain system through a shut-off solenoid valve 21, and through the check valve 22c a cavity of the hydraulic cylinder 23 with an electromagnetic actuator and a piston stroke regulator 24. The cavity of the hydraulic cylinder 23 through the check valve 25 is connected to the reservoir of the working fluid (not shown).

On axis 18, switching contacts 26 and normally closed contacts 27 are mounted to interact with a thread shape master 28, which

  provided with a power hydraulic cylinder 29, the rod cavity of which is connected to the hydraulic cylinder 13 of the drive for the additional carriage 11. The rodless cavity of the secondary hydraulic cylinder 29 is connected to the drain system through the electro-actuated shut-off valve 30 with the electromagnetic drive through the non-return valve 31 to the hydraulic cylinder 32 with the electromagnetic actuator spring piston. Through a check valve 33, the cavity of the hydraulic cylinder 32 is connected to the reservoir of the working fluid. To interact with the copier

5 28 The machine is equipped with overlapping contacts 34. Contacts 34 are placed on a slider 35, which is equipped with a drive hydrocylide 36, the cavity of which is connected to the hydraulic cavities5

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37 cylinders with electro-magnetic drives and piston stroke adjustment. The drive winding of each hydrocylinder is connected to software device 17 via switch 38 and to the power supply system through normally open contacts 39. Contacts 39 are activated by an electromagnetic drive ratchet 40, the winding of which is connected to switch 38. The ratchet 40 is equipped with electromagnets for discharging 41 dogs 41 the windings of which are connected to the software device 17.

On the machine bed, normally closed contacts 42 of the extreme left position of the longitudinal feed support are placed. Contacts 43 and 44 - nor

In the process of installation, a threaded copier 4 and a thread form copier 28 are installed. The regulator 24 sets the longitudinal feed of each pass. 5 Regulator movement of the piston of the hydraulic cylinder 32 sets the lateral flow. The switch 38 sets the number of entries when cutting a multiple thread, and adjusting the stroke of the pistons of the hydraulic cylinders 37, the required offset of the copier 4 depending on the number of threads entered. After installing the workpiece, the drive 1 of its rotation is turned on. Through gear 3, the rotation is transmitted to the threaded copier 4, which rotates with the workpiece. The spool is in the left position. The fluid from the lower cavity of the hydraulic cylinder is drained, the probe 6, the mutually open contacts are limited to 20 with the cam 4, enters into it

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no movement of the caliper longitudinal feed. The contacts 43 connect the power supply circuit to the relay 45 with a normally open contact 46 with the switching contacts and a normally open contact 48. The contacts 46, self-blocking the relay coil, are connected through the contacts 42 to the power supply. Normally open contacts 47 are connected to the power supply circuit and the winding of the electromagnetic actuator of spool 16. Normally closed contacts 47 are connected to the power supply circuit to the drive winding of clamp 49 of axis 18. Normally open contacts 48 are connected to normally closed contacts 26. Normally open contacts 26 are connected to relay 50 through contacts 44. Relay 50 is equipped with normally open contacts 51-54. Self-blocking contacts 51 are connected to the supply circuit via contacts 27. Contacts 52 are connected to the supply circuit by a winding of a locking solenoid valve 21, contacts 53 are a winding of a hydraulic cylinder 32 drive. Contacts 54 are connected to a normally open contacts 34 with a winding of a locking solenoid valve 30 and a switch 38. Interacting with copy 50 rum 28 of the thread form, contacts 26, 27 and 34 are arranged so that contacts 26 work upon contact with the right one forming the thread profile, contacts 21 - with the left, contacts 34 with the bottom (contacts 34 are shown in the drawing in).

The machine works as follows.

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a screw groove 5. The working fluid is supplied to the left cavity of the hydraulic cylinder 15, its piston begins to move the caliper 12 to the right. The amount of displacement of the caliper per revolution is determined by the pitch of the helical groove 5 of copier 4, i.e. the pitch of the thread cut on the workpiece is equal to the pitch of the helical groove. At the end of the passage, the caliper 12 finds contacts 43 and 44, closes them. Through the contacts 43, the voltage is applied to the winding of the relay 45, which operates and closes its contacts. Through the contacts 47, a voltage is applied to the winding-drive of the spool, which moves to the right. The working fluid is supplied to the right cavity of the hydraulic cylinder 15 and drained to the left. The caliper moves to the left - the return stroke. Fluid is fed into the lower cavity of the hydraulic cylinder of the probe 6, the probe during the return stroke is removed from the copier, and the tool 10 from the product 2. Normally closed contacts 47 open and de-energize the electromagnet of the clamp 49 of the axis 18. Through the contacts 48 the voltage is applied to the electromagnetic drive of the hydraulic cylinder 23 The piston of the hydraulic cylinder displaces the fluid into the cavity of the hydraulic cylinder 20, the piston of which moves the axis 18 and the copier 4 to the right. Through . pins 42 and 46, the voltage is applied to the winding of the relay 45 and after the contacts 43 are opened, due to the withdrawal of the support 12 from the rightmost position. When you return the caliper 12 to its original (far left) position, he

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In the process of installation, a threaded copier 4 and a thread form copier 28 are installed. The regulator 24 sets the longitudinal feed of each pass. The regulator of the stroke of the piston of the hydraulic cylinder 32 sets the lateral flow. The switch 38 sets the number of visits when cutting a multiple thread, and adjusting the stroke of the pistons of the hydraulic cylinders 37 - the required offset of the copier 4, depending on the number of threads. After installation of the workpiece, the drive 1 is turned on. Through gear 3, the rotation is transmitted to the threaded copier 4, which rotates with the workpiece. The spool is in the left position. The fluid from the lower cavity of the hydraulic cylinder is drained, probe 6,

with copier 4, enters into it

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a screw groove 5. The working fluid is supplied to the left cavity of the hydraulic cylinder 15, its piston begins to move the caliper 12 to the right. The amount of displacement of the caliper per revolution is determined by the pitch of the helical groove 5 of copier 4, i.e. the pitch of the thread cut on the workpiece is equal to the pitch of the helical groove. At the end of the passage, the caliper 12 finds contacts 43 and 44, closes them. Through the contacts 43, the voltage is applied to the winding of the relay 45, which operates and closes its contacts. Through the contacts 47, a voltage is applied to the winding-drive of the spool, which moves to the right. The working fluid is supplied to the right cavity of the hydraulic cylinder 15 and drained to the left. The caliper moves to the left - the return stroke. Fluid is fed into the lower cavity of the hydraulic cylinder of the probe 6, the probe during the return stroke is removed from the copier, and the tool 10 from the product 2. Normally closed contacts 47 open and de-energize the electromagnet of the clamp 49 of the axis 18. Through the contacts 48 the voltage is applied to the electromagnetic drive of the hydraulic cylinder 23 The piston of the hydraulic cylinder displaces the fluid into the cavity of the hydraulic cylinder 20, the piston of which moves the axis 18 and the copier 4 to the right. Through . pins 42 and 46, the voltage is applied to the winding of the relay 45 and after the contacts 43 are opened, due to the withdrawal of the support 12 from the rightmost position. When you return the caliper 12 to its original (far left) position, he

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opens contacts 42, the relay 45 de-energizes, the working stroke of the caliper begins, as the spool moves to the left. Under the action of the piston, the piston of the hydraulic cylinder 23 is lowered and into its cavity from the working fluid reservoir through the check valve 25 is supplied a quantity of fluid corresponding to the piston stroke and displaced into the power hydraulic cylinder 20. Contacts 47 apply voltage to clamp 49, and axis 18 is fixed. The probe b comes in contact with the threaded copier 4, and since the latter is displaced relative to product 2, the working tool 10 expands the helical groove on the product by the amount of axial displacement of the copier during a working stroke. I

With the next working stroke, the screw groove expands again. When the specified thread profile width is reached, the contacts 26 interact with the cam 28 and form the threads and open. The supply of voltage to the electromagnet of the hydraulic cylinder 23 is stopped, its piston stops, the movement of the axis 18 and the copier 4 stops, which provides greater precision for processing by size regardless of the installed longitudinal feed. Through the closed contacts 26, the voltage is applied to the open contacts 44, since the contacts 26 close when the caliper 12 returns during an inevitable delay in moving the piston of the hydraulic cylinder 23 (if necessary, the delay I can be increased by installing drossel in the system between the connection of the cavity of the power cylinder 20 with shut-off valve 21 and check valve 22). A working stroke is performed according to the set size of the last pass. At the end of the aisle, the caliper closes contacts 44, the relay 50 triggers and blocks itself through its contacts 51 and normally closed contacts 27. Through the contacts 52, voltage is applied to the shut-off electrovalve 21, after the operation of which the fluid of the power hydraulic cylinder 20 is drained, the spring 8 returns to the initial position, moves to the left until the contacts 27 are crushed as a result of their interaction with the thread form master 28, the relay 50 is de-energized, the stop valve 21 is closed

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the movement of the axis 18 to the left stops, it is set to the position specified by the copier 28. Through the contacts 53 that are closed when the relay 50 is activated, the voltage is applied to the electro-cylinder of the hydraulic cylinder 32, the piston rises and forces the liquid into the rodless cavity of the power hydraulic cylinder 29, the piston of which moves the copier 28 upwards. From the rod end of the power cylinder 29, the fluid is displaced into the hydraulic cylinder 13 of the wedge device, which transversely feeds the processing tool 1 O. Then, the cycle of the multi-pass treatment for the entire width of the thread profile is repeated.

At the end of the cycle, an automatic cross feed is carried out and

again, a multi-pass profile width processing is performed. When you-, the progress of the processing tool on the size of the full depth of the profile of the copier

The 28 thread form switches contacts 34. At the moment of reaching the specified depth, the winding of the hydraulic cylinder 32 is de-energized, the movement of the copier stops and transverse feed

tool that provides accurate installation of the depth of the thread profile, regardless of the installed cross feed. Through the closed contacts 34 and contacts 54 of the relay 50, after they have triggered after the last pass across the width of the profile, the voltage is applied to the shut-off solenoid 30. The fluid from the power cylinder 29 is drained, the thread form copier 28 and the machining tool 10 are returned to their original position. Since the fluid from the power cylinder 20 is discharged through the open shut-off solenoid valve 21, the axis 18 together with the cam 4 also returns to its original position. The cycle of threading a multi-pass thread through its full profile ends. With contacts 54

through the switch 38 to the software device 17 receives a signal about the end of processing. If a multiple thread is cut, the switch 38 sets the number of entries, and the piston stroke controllers of the hydraulic cylinders 37 sets the feed rate of the slider 35 after processing one stroke of thread, depending on the number of entries

threads (with double-threaded thread 1/2 thread pitch, three-thread 1/3 thread pitch, etc.) - When the first run is completed, when the contacts 54 are closed, the voltage through the switch 38 is applied to the ratchet electromagnet 40, which is biased one step and closes the contacts 39, through which the voltage is applied to the electromagnet of the hydraulic cylinder 37. The fluid from the hydraulic cylinder is pushed into the cavity of the hydraulic cylinder of the actuator 36, and its piston moves the slider 35 and with it the threaded copier 4 relative to the piece 2 A thread of multiple thread. After cutting the second run, the third run is similarly performed, and so on. Upon completion of the cutting of the last run from the successive contacts 39, the switch 38 sends a signal to the software device 17 to finish processing the product. From the software device, voltage is applied to the tap-off magnets of the ratchet pawl, and the ratchet 40 is returned to its original position. The machine is ready for processing the next product.

Compiled by A.Klimov Tehred N.Glushchenko

Proofreader S.CH

Circulation 976 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 1I3035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, city, st. Project, 4

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Claims (1)

Claims of a Hydroscopy Threaded Lathe comprising a frame on which a spindle assembly and a kinematically associated threaded copier with an axis are mounted, a longitudinal and transverse feed supports with a hydraulic cylinder and a multipass threading mechanism associated with a threaded copier, characterized in that expansion of technological capabilities, it is equipped with a slide mounted on the frame, placed in it with the possibility of axial movement of a thread shape copier and two displacement drives, each of which is made in the form of power hydraulic cylinders, the rodless cavities of which are associated with a control system equipped with a drain check valve, two non-return valves and a hydraulic cylinder with an adjustable piston stroke, one of the power hydraulic cylinders connected to the thread form copier and its rod cavity - with the hydraulic cylinder caliper cross feeds, and another power hydraulic cylinder is connected with the axis of the copier, installed with the possibility of axial movement joint with the copier. Corrector S.Cherni