CN214444627U - Main shaft positioning device for engine valve - Google Patents

Abstract

The utility model discloses a be used for engine valve's main shaft positioner, be applied to valve processing lathe, processing lathe includes the lathe bed, including conical surface positioner, conical surface location drive arrangement and main shaft location drive arrangement, main shaft location drive arrangement and conical surface location drive arrangement fixed mounting are on the lathe bed, conical surface location drive arrangement and conical surface positioner fixed connection, conical surface location drive arrangement is used for driving conical surface positioner axial motion, conical surface positioner installs on main shaft location drive arrangement through the key-type connection, main shaft location drive arrangement drives conical surface positioner through the key-type connection and rotates, thereby make rotatory and the valve rod portion location of drive valve, main shaft location drive arrangement is used for cliping fixed valve and fixes a position valve rod portion terminal surface, conical surface positioner is used for fixing a position the valve conical surface. The utility model discloses can effectively fix a position engine valve to promote the machining precision.

Description

Main shaft positioning device for engine valve

Technical Field

The utility model relates to a valve processing technology field, concretely relates to a main shaft positioner for engine valve.

Background

The engine valve (called valve for short, same below) has a unique shape, as shown in fig. 1, and comprises a valve head part and a valve rod part 26, wherein the valve head part comprises a valve disc end surface 21, a valve disc side angle 22, a valve disc excircle, a valve disc conical surface and a valve neck part 25, the valve neck part 25 is also called as an R position, one end of the valve rod part 26, which is far away from the valve head part, is a rod part end surface 27, and the rod part end surface 27 is used for positioning during valve processing. Due to the unique structure of the valve, the existing valve processing equipment is generally divided into conventional processing equipment and special processing equipment. The conventional processing equipment refers to a common mark machine or processing equipment formed by additionally arranging a common clamp on the mark machine, such as a mesh belt furnace, a box-type furnace and a pit furnace in the market, can be directly used for heat treatment processing of the valve, and can be used for turning the excircle of the valve disc, the end surface 21 of the valve disc and the side angle 22 of the valve disc, such as processing equipment formed by additionally arranging a non-stop clamp on a common lathe and a hydraulic four-station lathe. The special processing equipment is a special valve machine specially developed by equipment research and development and manufacturing companies, belongs to customization and is specially designed for the processing characteristics of the valve.

At present, no matter conventional processing equipment or special processing equipment, the improvement is mainly focused on the aspects of single-machine automation, multi-station change from single station to multi-station, automatic connection of scattered machine tools and the like at home and abroad, the high integration and development of the working procedures are less, and particularly, the multi-working-procedure combined machining lathe for the valve head is not found.

In the existing processing technology of the valve head, most parts of the valve head are processed respectively, after one part is processed, the valve head needs to be unloaded and transferred to a new station, then the valve head is loaded and processed, and the processes are circulated in sequence until the processing operation of each part of the valve head is completed. The machining operation of the valve head is completed, multiple times of feeding, discharging and transferring are involved, the valve needs to be positioned again before a new part is machined every time, the production efficiency of the valve is seriously influenced, and adverse effects can be brought to the machining precision and the production quality of the valve due to repeated positioning.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a be not enough to prior art, one of the purposes of the utility model provides a main shaft positioner for engine valve, it can solve the problem of engine valve multiple operation combined machining location.

Realize the utility model discloses a technical scheme of one of the purpose does: a main shaft positioning device for an engine valve is applied to a valve processing lathe, the processing lathe comprises a lathe body, a conical surface positioning driving device and a main shaft positioning driving device,

the main shaft positioning driving device and the conical surface positioning driving device are fixedly arranged on the lathe bed, the conical surface positioning driving device is fixedly connected with the conical surface positioning device, the conical surface positioning driving device is used for driving the conical surface positioning device to move axially, the conical surface positioning device is arranged on the main shaft positioning driving device through key connection, the main shaft positioning driving device drives the conical surface positioning device to rotate through key connection, so that the driving valve rotates and the valve rod portion is positioned, the main shaft positioning driving device is used for clamping the fixed valve and positioning the end face of the valve rod portion, and the conical surface positioning device is used for positioning the valve conical surface.

Further, the main shaft positioning driving device comprises a rotary oil cylinder, a rotary synchronizing assembly, a transmission shaft assembly, a positioning rod assembly, a sandwich seat and a sandwich piece,

the conical surface positioning driving device is connected with the conical surface positioning device, the conical surface positioning device is arranged on the main shaft positioning driving device through key connection, the conical surface positioning driving device is used for driving the conical surface positioning device to move so as to enable the conical surface positioning device to be in contact with the conical surface of the valve, and therefore the conical surface positioning device can position the conical surface of the valve,

the rotary oil cylinder is fixedly connected with one end of the positioning rod component, the sandwich component is arranged at the other end of the positioning rod component, the sandwich component is positioned in the sandwich seat, the positioning rod component is arranged in the transmission shaft component and the rotating synchronous component along the axial direction of the transmission shaft component, the other end of the positioning rod component is contacted with the rod part end face of the valve rod part, the sandwich component is contacted with the valve,

the sandwich seat is fixedly arranged at one end of the transmission shaft component, the rotary synchronizing component is fixedly arranged at the other end of the transmission shaft component and is in transmission connection with the rotary oil cylinder,

the rotary oil cylinder is used for pulling the sandwich part through the positioning rod component, the sandwich part clamps the rod part of the air valve to limit the air valve to rotate only in the axial direction, the positioning rod component is used for positioning the end face of the rod part of the air valve to limit the displacement of the air valve in the axial direction, after the rod part of the air valve is clamped, the rotary oil cylinder drives the sandwich seat to rotate sequentially through the rotary synchronizing component and the transmission shaft component, the sandwich seat drives the sandwich part and the air valve to rotate by taking the axial direction as an axis,

the conical surface positioning device is mounted on the spindle positioning driving device through a key connection, the conical surface positioning sliding seat is connected with a conical surface positioning device mounting seat of the conical surface positioning driving device, the conical surface positioning driving device drives the conical surface positioning sliding seat to axially move to drive the conical surface positioning sleeve to assist in positioning the valve conical surface, and a bearing assembly is arranged between the conical surface positioning sliding seat and the conical surface positioning sliding sleeve, so that the sliding seat does not rotate along with the sliding sleeve.

Furthermore, the conical surface positioning device comprises a conical surface positioning slide seat, a conical surface positioning slide sleeve, a conical surface positioning rear end cover, a conical surface positioning locking bearing, a conical surface positioning angle contact bearing group and a conical surface positioning front end cover,

the conical surface positioning driving device comprises an oil cylinder, a support, a lathe bed connecting piece, a guide rail assembly and a conical surface positioning device mounting seat; the oil cylinder is arranged on a support, the support is movably connected with the lathe bed connecting piece through a guide rail assembly, and the conical surface positioning device mounting seat is fixedly arranged at one end of the guide rail assembly. The bed body connecting piece is fixedly arranged on the bed body, so that the conical surface positioning driving device is arranged on the bed body,

the conical surface positioning slide seat is connected with the conical surface positioning device mounting seat which is fixedly arranged on one end of the guide rail component, the oil cylinder is used for driving the conical surface positioning device mounting seat to move so as to drive the conical surface positioning sleeve to axially move, so that the conical surface positioning sleeve is contacted with the conical surface of the valve, the bed body connecting piece is fixedly arranged on the bed body, so that the conical surface positioning driving device is arranged on the bed body, two ends of the support frame are transversely arranged on the guide rail component,

the conical surface positioning locking bearing and the conical surface positioning angular contact bearing group are arranged between the conical surface positioning sliding seat and the conical surface positioning sliding sleeve, the locking bearing is used for limiting the sliding seat so as to prevent the sliding seat from rotating along with the sliding sleeve, and the angular contact bearing group is used for ensuring that the sliding sleeve can rotate; the front and the back of the sliding seat are respectively provided with a conical surface positioning rear end cover and a conical surface positioning front end cover, a conical surface positioning sleeve is arranged at the front end of the positioning front end cover, the front end of a positioning rod component is arranged in the sliding sleeve, and the conical surface positioning rear end cover, the conical surface positioning locking bearing, the conical surface positioning angle contact bearing and the conical surface positioning front end cover are arranged on the conical surface positioning sliding sleeve.

The utility model has the advantages that: the utility model discloses can effectively fix a position engine valve to guarantee accurate machining precision, and then reduce operating personnel, shorten process time, improve production efficiency.

Drawings

FIG. 1 is a schematic diagram of an engine valve configuration;

fig. 2 is a top view of the present invention;

fig. 3 is a side view of the present invention;

FIG. 4 is a schematic structural view of the cone positioning driving device;

FIG. 5 is a schematic view showing the relationship between the spindle positioning drive and the cone positioning drive;

FIG. 6 is a schematic view of the cone positioning device installed on the base of FIG. 5;

fig. 7 is a schematic structural view of the spindle positioning driving device of the present invention;

FIG. 8 is a schematic view of the cone positioning device;

FIG. 9 is a side view of the trailing end support;

FIG. 10 is a cross-sectional view of the tail positioning device;

FIG. 11 is a schematic top view of a tool holder apparatus;

FIG. 12 is a side schematic view of the tool holder;

FIG. 13 is a partial schematic view of the cone positioning drive mounted to the bed;

wherein, 1-a first tool rest guide rail, 2-a first motor, 3-a second tool rest guide rail, 4-tool rest screw rod, 5-tool rest device, 501-tool rest longitudinal movement flat plate, 502-tool rest axial movement flat plate, 503-tool rest longitudinal movement guide rail, 504-tool rest disc, 505-tool rest disc driving device, 506-tool rest device guide rail installation block, 507-tool rest screw nut, 508-tool rest longitudinal movement driving device, 6-tail end supporting device, 601-tail end shell, 602-tail end installation seat, 603-tail end screw nut, 604-tail end guide rail installation block, 7-tail end positioning device, 701-tail end positioning rear cover, 702-tail end positioning sealing element, 703-tail end positioning piston, 704-tail end positioning connection sleeve, 703-tail end positioning connection sleeve, and, 705-tail end positioning first bearing, 706-tail end positioning connecting piece, 707-tail end positioning front cover, 708-tail end positioning piece, 709-tail end positioning second bearing, 710-tail end positioning piece mounting sleeve, 8-second tail end guide rail, 9-tail end screw rod, 10-first tail end guide rail, 11-second motor, 12-lathe bed, 13-conical surface positioning device, 131-conical surface positioning slide seat, 132-conical surface positioning slide sleeve, 133-conical surface positioning sleeve, 134-conical surface positioning rear end cover, 135-conical surface positioning locking bearing, 136-conical surface positioning angle contact bearing group, 137-conical surface positioning front end cover, 14-conical surface positioning driving device, 141-oil cylinder, 142-bracket, 143-lathe bed connecting piece, 144-guide rail component, 145-a conical surface positioning device mounting seat, 15-a main shaft positioning driving device, 151-a rotary oil cylinder, 152-a rotary synchronizing assembly, 153-a transmission shaft assembly, 154-a positioning rod assembly, 155-a sandwich seat, 156-a sandwich piece, 21-an air valve disc end surface, 22-an air valve disc side angle, 23-an air valve excircle, 24-an air valve conical surface, 25-an air valve neck, 26-an air valve rod part and 27-a rod part end surface.

Detailed Description

The invention will be further described with reference to the drawings and the embodiments.

As shown in fig. 1 to 13, a main shaft positioning device for an engine valve is applied to an engine valve combined machining lathe, which includes a lathe bed 12, and a tool rest device 5, a tail end supporting device 6, a tail end positioning device 7, a cone positioning device 13, a cone positioning driving device 14 and a main shaft positioning driving device 15 which are arranged on the lathe bed 12. The bed body is fixedly provided with a first tool rest guide rail 1, a first motor 2, a second tool rest guide rail 3, a first tail end guide rail 10, a second motor 11 and a second tail end guide rail 8 in parallel, the first motor 2 is positioned between the first tool rest guide rail 1 and the second tool rest guide rail 3, and the second motor 11 is positioned between the first tail end guide rail 10 and the second tail end guide rail 8.

And cutters with different specifications and types are mounted on the tool rest device 5 so as to provide various cutters meeting respective requirements in the valve composite machining process. The tool rest device 5 is slidably mounted on the first tool rest rail 1 and the second tool rest rail 3, and the tool rest device 5 is slidable along the axial direction of these rails (the first tool rest rail 1 and the second tool rest rail 3) to slidably mount the tool rest device 5 on the bed 12.

A first motor 2 and a tool rest screw rod 4 are fixedly arranged on one side of the tool rest device 5, the first motor 2 is fixedly arranged on the lathe bed 12, an output shaft of the first motor 2 is fixedly connected with one end of the tool rest screw rod 4, the other end of the tool rest screw rod 4 is connected with the tool rest device 5, and the tool rest screw rod 4 is positioned between the first tool rest guide rail 1 and the second tool rest guide rail 3. The first motor 2 is used for driving the tool rest device 5 to axially slide along the guide rail through the tool rest screw rod 4, so that the tool rest device 5 can move on the machine bed 12.

The tool rest device 5 comprises a tool rest longitudinal movement flat plate 501, a tool rest axial movement flat plate 502, a tool rest longitudinal movement guide rail 503, a tool rest disc 504, a tool rest disc driving device 505, a tool rest device guide rail mounting block 506, a tool rest nut 507 and a tool rest longitudinal movement driving device 508. The tool holder disk driving device 505 arranged on the tool holder longitudinal movement flat plate 501 is in linkage connection with the tool holder disk 504, and the tool holder disk driving device 505 is a motor or other power device and is used for driving the tool holder disk 504 to rotate so that a corresponding tool arranged on the tool holder disk 504 is turned to an engine valve to be processed to complete tool switching. The tool rest device guide rail mounting blocks 506 and the tool rest nut 507 are fixedly mounted at the bottom end of the tool rest axial movement flat plate 502, the tool rest device guide rail mounting blocks 506 are respectively arranged on two sides of the bottom end of the tool rest axial movement flat plate 502, the tool rest device guide rail mounting blocks 506 are slidably arranged on the first tool rest guide rail 1 and the second tool rest guide rail 3 and can axially slide along the first tool rest guide rail 1 and the second tool rest guide rail 3, so that the tool rest device 5 can axially slide along the first tool rest guide rail 1 and the second tool rest guide rail 3 through the tool rest device guide rail mounting blocks 506, the tool rest nut 507 is located between the two tool rest device guide rail mounting blocks 506, the tool rest nut 507 is in linkage connection with the tool rest screw rod 4, and the tool rest nut 507 is driven to drive the whole tool rest device 5 to axially slide along the first tool rest guide rail 1 and the second tool rest guide rail 3. The two sides of the upper end of the tool rest axial movement flat plate 502 are respectively provided with a tool rest longitudinal movement guide rail 503, the tool rest longitudinal movement flat plate 501 is arranged on the tool rest longitudinal movement guide rail 503 in a sliding mode and can slide axially along the tool rest longitudinal movement guide rail 503, the tool rest disc driving device 505 is fixedly arranged on the tool rest longitudinal movement flat plate 501, and the tool rest longitudinal movement driving device 508 is in linkage connection with the tool rest longitudinal movement flat plate 501 to drive the tool rest longitudinal movement flat plate 501 to slide axially along the tool rest longitudinal movement guide rail 503, so that small-range displacement adjustment is performed on the tool rest disc 504, and a tool on the tool rest disc 504 can be aligned to an engine valve to be machined more accurately. Wherein the entire carriage assembly 5 is capable of wide-range adjustment of the position of the carriage disk 504 by sliding axially along the first guide rail. For example, the tool holder device 5 may be moved to a remote location away from the engine valve to be machined, without the need for machining. When the engine valve needs to be machined, the tool holder disk 504 is adjusted in a small range by the aid of the tool holder longitudinal movement guide rail 503, so that a tool on the tool holder disk 504 can be aligned to the valve to be machined more accurately.

The tail end positioning device 7 is arranged on one side of the tool rest device 5, the tail end positioning device 7 is fixedly installed on the tail end supporting device 6, the tail end positioning device 7 is used for positioning the valve disc end face 21 and the valve excircle 23 of the engine valve to play a role in auxiliary positioning, and the tail end supporting device 6 is movably installed on the lathe bed 12 to enable the tail end supporting device 6 to move on the lathe bed 12.

One side of the tail end supporting device 6 is provided with a second motor 11 and a tail end screw rod 9, the second motor 11 is fixedly installed on the lathe bed 12, an output shaft of the second motor 11 is connected with one end of the tail end screw rod 9, the other end of the tail end screw rod 9 is connected with the tail end supporting device 6, and the second motor 11 is used for driving the tail end supporting device 6 to slide axially along a second guide rail through the tail end screw rod 9, so that the tail end supporting device 6 can move on the lathe bed 12.

The tail end supporting device 6 is installed on the bed 12 through the first tail end guide rail 10 and the second tail end guide rail 8, the tail end supporting device 6 can slide along the first tail end guide rail 10 and the second tail end guide rail 8, the first tail end guide rail 10 and the second tail end guide rail 8 are fixedly installed on the bed 12 in parallel, and the first tail end guide rail 10 and the second tail end guide rail 8 are arranged in parallel.

Tail end strutting arrangement 6 includes tail end shell 601, tail end mount pad 602, tail end screw 603 and tail end guide rail installation piece 604, tail end guide rail installation piece 604 and the equal fixed mounting of tail end screw 603 in the lower part of tail end mount pad 602, the both sides of tail end mount pad 602 lower part respectively set up a tail end guide rail installation piece 604, tail end screw 603 is located between two tail end guide rail installation pieces 604 and is connected with the other end of tail end lead screw 9, thereby make second motor 11 be connected with tail end strutting arrangement 6 through tail end lead screw 9, so that second motor 11 can drive tail end strutting arrangement 6 and slide on first tail end guide rail 10 and second tail end guide rail 8. Two trailing-end rail mounting blocks 604 are mounted on the first trailing-end rail 10 and the second trailing-end rail 8, respectively, so that the trailing-end support 6 can slide along the first trailing-end rail 10 and the second trailing-end rail 8.

A tail end housing 601 is fixedly mounted on the upper portion of the tail end mounting seat 602, and the tail end housing 601 is used for fixedly mounting the tail end positioning device 7, so that the tail end supporting device 6 can drive the tail end positioning device 7 to slide along the first tail end guide rail 10 and the second tail end guide rail 8 together.

The tail positioning device 7 includes a tail positioning rear cover 701, a tail positioning sealing member 702, a tail positioning piston 703, a tail positioning connecting sleeve 704, a tail positioning first bearing 705, a tail positioning connecting member 706, a tail positioning front cover 707, a tail positioning member 708, a tail positioning second bearing 709, and a tail positioning member mounting sleeve 710. The inner side of the tail end positioning rear cover 701 is in contact with a tail end positioning sealing element 702 sleeved on the tail end positioning piston 703, the rear end of the piston tail end positioning plug 703 extends into the tail end positioning rear cover 701 and is fixed on the tail end positioning rear cover 701, the front end extends into the tail end positioning connecting sleeve 704, the rear end of the tail end positioning element 708 sequentially extends into the tail end positioning front cover 707 and the tail end positioning connecting sleeve 704, the tail end positioning element 708 is used for positioning the valve disc end face 21 and the valve outer circle 23, the front end of the tail end positioning element 708 is positioned outside the tail end positioning front cover 707, the tail end positioning connecting element 706 inserts the tail end positioning element 708 into the tail end positioning element mounting sleeve 710, and the tail end positioning element mounting sleeve 710 is fixed on the tail end positioning connecting sleeve 704 through a tail end positioning second bearing 709. The trailing end positioning member 708 rotates along with the engine valve by positioning the trailing end positioning first bearing 705 by the trailing end positioning first bearing 705.

The spindle positioning driving device 15 includes a rotary cylinder 151, a rotation synchronizing assembly 152, a transmission shaft assembly 153, a positioning rod assembly 154, a sandwich base 155 and a sandwich member 156. The rotary oil cylinder 151 is fixedly connected with one end of the positioning rod assembly 154, the sandwich piece 156 is installed at the other end of the positioning rod assembly 154, the sandwich piece 156 is located in the sandwich seat 155, the positioning rod assembly 154 is arranged inside the transmission shaft assembly 153 and the rotation synchronization assembly 152 along the axial direction of the transmission shaft assembly 153, the other end of the positioning rod assembly 154 is in contact with the rod end face 27 of the valve rod portion 26, and the sandwich piece 156 is in contact with the valve. The centre gripping seat 155 is fixedly arranged at one end of the transmission shaft assembly 153, the rotating synchronization assembly 152 is fixedly arranged at the other end of the transmission shaft assembly 153, and the rotating synchronization assembly 152 is in transmission connection with the rotary oil cylinder 151.

The rotary cylinder 151 is used for pulling the sandwich member 156 through the positioning rod assembly 154, the sandwich member 156 clamps the valve rod part 26 to limit the valve to rotate only in the axial direction, and the positioning rod assembly 154 is used for positioning the rod end surface 27 of the valve rod part 26 to limit the valve to displace in the axial direction. After the valve stem 26 is clamped, the rotary cylinder 151 drives the insert seat 155 to rotate sequentially through the rotary synchronizing assembly 152 and the transmission shaft assembly 153, and the insert seat 155 drives the insert 156 and the valve to rotate around the axial direction. Through the cooperation of the sandwich piece 156, the sandwich seat 155 and the positioning rod assembly 154, the valve to be machined can only rotate on the spindle positioning driving device 15 by taking the axial direction as the axis, namely, five degrees of freedom of the valve are limited, and the valve is more conveniently machined.

The conical surface positioning device 13 comprises a conical surface positioning slide seat 131, a conical surface positioning slide sleeve 132, a conical surface positioning sleeve 133, a conical surface positioning rear end cover 134, a conical surface positioning locking bearing 135, a conical surface positioning angle contact bearing group 136 and a conical surface positioning front end cover 137. The conical surface positioning driving device 14 comprises an oil cylinder 141, a bracket 142, a bed connecting piece 143, a guide rail assembly 144 and a conical surface positioning device mounting seat 145; the cylinder 141 is mounted on the bracket 142, the bracket 142 is connected with the bed connecting piece 143 through the guide rail assembly 144, and the cone positioning device mounting seat 145 is fixedly mounted at one end of the guide rail assembly 144. The bed coupler 143 is fixedly mounted to the bed 12 to mount the bevel positioning drive 14 to the bed 12.

The conical surface positioning device 13 is mounted on a 155 clamping seat of the spindle positioning driving device 15 through a conical surface positioning sliding sleeve 132 key joint, the conical surface positioning sliding seat 131 is connected with a conical surface positioning device mounting seat 145 of the conical surface positioning driving device 14, the conical surface positioning driving device 14 drives the conical surface positioning sliding seat 131 to axially move to drive the conical surface positioning sleeve 133 to perform auxiliary positioning on the valve conical surface 24, and a bearing assembly is arranged between the conical surface positioning sliding seat 131 and the conical surface positioning sliding sleeve 132 to enable the conical surface positioning sliding seat 131 not to rotate along with the conical surface positioning sliding sleeve 132.

The conical surface positioning locking bearing 135 and the conical surface positioning angle contact bearing set 136 are arranged between the conical surface positioning sliding seat 131 and the conical surface positioning sliding sleeve 132, the conical surface positioning locking bearing 135 is used for limiting the conical surface positioning sliding seat 131 to prevent the conical surface positioning sliding seat 131 from rotating along with the conical surface positioning sliding sleeve 132, and the conical surface positioning angle contact bearing assembly 136 is used for ensuring that the conical surface positioning sliding sleeve 132 can rotate; the front and the back of the conical surface positioning sliding seat 131 are respectively provided with a conical surface positioning rear end cover 134 and a conical surface positioning front end cover 137, a conical surface positioning sleeve 133 is arranged at the front end of the conical surface positioning front end cover 137, and the conical surface positioning rear end cover 134, the conical surface positioning locking bearing 135, the conical surface positioning angle contact bearing group and the conical surface positioning front end cover 137 are all arranged on the conical surface positioning sliding sleeve 132.

The conical surface positioning device 13, the conical surface positioning driving device 14 and the main shaft positioning driving device 15 form a main shaft positioning device for the engine valve, so as to complete positioning of the valve rod part 26, the valve conical surface 24 and the valve excircle 23.

In practical use, the engine valve combined machining lathe can be operated according to the following steps:

step 1: the swivel cylinder 151 pushes the positioning rod assembly 154 to apply a forward force to the positioning rod assembly 154, i.e., a force directed toward the sandwich 156, to release the sandwich 156, to open the sandwich 156, and to load the engine valve to be machined into the sandwich 156.

Step 2: thereby rotary cylinder 151 pulls locating lever subassembly 154 through the inside piston pulling of rotary cylinder 151 and produces a backward effort to locating lever subassembly 154, effort orientation rotary cylinder 151 direction promptly, also the effort direction is for keeping away from sandwich 156, because sandwich 156 is installed on locating lever subassembly 154 through the screw thread mode, sandwich 156 follows the retrusion and touches sandwich seat 155, receive the conical inner chamber effect of sandwich seat 155, sandwich 156 is in the clamping state, thereby firmly press from both sides the valve, accomplish the main positioning to valve stem portion 26.

And step 3: the tool block device 5 is moved into position and the tool block disc 504 is moved into position so that the first tool of the tool block disc 504 is aligned with the valve cone 24 of the engine valve and the valve cone 24 is machined.

And 4, step 4: after the valve conical surface 24 is machined, the oil cylinder 141 pushes the support 142 to move forwards, the support 142 pushes the conical surface positioning device installation seat 145 to move forwards, the conical surface positioning sleeve 133 moves forwards through the conical surface positioning sliding seat 131 connected with the conical surface positioning device installation seat 145, and therefore the conical surface positioning sleeve 133 is contacted with the valve conical surface 24, and auxiliary positioning of the valve conical surface 24 is completed.

And 5: rotating the tool carrier disc 504 to enable the second tool to align with the valve excircle 23 and the valve disc side angle 22, and sequentially processing the valve excircle 23 and the valve disc side angle 22 by the second tool until the processing is finished; then, the holder disk 504 is rotated again so that the third tool is aligned with the valve disk end surface 21, and the valve disk end surface 21 is machined until the machining is completed.

Step 6: the oil cylinder 141 moves backwards to drive the conical surface positioning slide seat 131 to move backwards, so that the conical surface positioning sleeve 133 is separated from the valve conical surface 24, and the auxiliary positioning of the valve conical surface 24 is withdrawn; then, the tail end positioning device 7 is moved to a proper position by the first tail end guide rail 10 and the second tail end guide rail 8, and then the tail end positioning piston 703 is pushed to move the tail end positioning connection sleeve 704, so that the tail end positioning piece 708 is contacted with the valve disc end surface 21, and the positioning of the valve disc end surface 21 is completed.

And 7: after the positioning of the valve disc end face 21 is completed, the tool holder disc 504 is rotated again, the first tool processes the valve neck 25, and after the valve neck 25 is processed, the first tool processes the valve conical surface 24 again, so that all processing of the engine valve is completed.

And 8: the rotary cylinder 151 pushes the positioning rod assembly 154 to generate a forward force on the positioning rod assembly 154, i.e., a force toward the sandwich 156, so that the sandwich 156 is in a released state, and the engine valve is removed from the sandwich 156, thereby completing the engine valve machining.

The utility model discloses in valve loading and unloading and course of working, the locating bar subassembly is not along with the hydro-cylinder along the central axis back-and-forth movement at the rotation process, and relative stillness carries out axial positioning to valve stem portion 26 all the time, nevertheless can be along with the high-speed rotation of rotary cylinder to accomplish processing under the engine valve rotation state. In the machining process of the valve excircle 23, the valve disc end face 21 and the valve disc side angle 22, auxiliary positioning is always applied to the valve conical surface 24, and machining precision is guaranteed. In the same process of machining the valve conical surface 24 and the valve neck 25, the auxiliary positioning is added to the outer circle of the valve disc, and the machining precision is guaranteed. In whole course of working, 5 process steps under 1 process with 5 processes synthesis originally, reduce last unloading operation and transportation time 4 at least, reduce operating personnel, shorten process time, improve production efficiency.

The embodiment disclosed in this specification is only an example of the single-sided features of the present invention, and the protection scope of the present invention is not limited to this embodiment, and any other embodiments having equivalent functions all fall into the protection scope of the present invention. Various other changes and modifications may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such changes and modifications should fall within the scope of the present invention.

Claims (3)

1. A main shaft positioning device for an engine valve is applied to a valve processing lathe, the processing lathe comprises a lathe body and is characterized by comprising a conical surface positioning device, a conical surface positioning driving device and a main shaft positioning driving device,

the main shaft positioning driving device and the conical surface positioning driving device are fixedly arranged on the lathe bed, the conical surface positioning driving device is fixedly connected with the conical surface positioning device, the conical surface positioning driving device is used for driving the conical surface positioning device to move axially, the conical surface positioning device is arranged on the main shaft positioning driving device through key connection, the main shaft positioning driving device drives the conical surface positioning device to rotate through key connection, so that the driving valve rotates and the valve rod portion is positioned, the main shaft positioning driving device is used for clamping the fixed valve and positioning the end face of the valve rod portion, and the conical surface positioning device is used for positioning the valve conical surface.

2. The spindle positioning device for an engine valve of claim 1, wherein the spindle positioning drive device comprises a rotary cylinder, a rotation synchronizing assembly, a drive shaft assembly, a positioning rod assembly, a sandwich seat and a sandwich member,

the conical surface positioning driving device is connected with the conical surface positioning device and is used for driving the conical surface positioning device to move so as to enable the conical surface positioning device to be contacted with the conical surface of the valve, thereby enabling the conical surface positioning device to complete the positioning of the conical surface of the valve,

the rotary oil cylinder is fixedly connected with one end of the positioning rod component, the sandwich component is arranged at the other end of the positioning rod component, the sandwich component is positioned in the sandwich seat, the positioning rod component is arranged in the transmission shaft component and the rotating synchronous component along the axial direction of the transmission shaft component, the other end of the positioning rod component is contacted with the rod part end face of the valve rod part, the sandwich component is contacted with the valve,

the sandwich seat is fixedly arranged at one end of the transmission shaft component, the rotary synchronizing component is fixedly arranged at the other end of the transmission shaft component and is in transmission connection with the rotary oil cylinder,

the rotary oil cylinder is used for pulling the sandwich part through the positioning rod component, the sandwich part clamps the rod part of the air valve to limit the air valve to rotate only in the axial direction, the positioning rod component is used for positioning the end face of the rod part of the air valve to limit the displacement of the air valve in the axial direction, after the rod part of the air valve is clamped, the rotary oil cylinder drives the sandwich seat to rotate sequentially through the rotary synchronizing component and the transmission shaft component, the sandwich seat drives the sandwich part and the air valve to rotate by taking the axial direction as an axis,

the conical surface positioning sliding seat is connected with a conical surface positioning device mounting seat of a conical surface positioning driving device, the conical surface positioning driving device drives the conical surface positioning sliding seat to axially move to drive the conical surface positioning sleeve to assist in positioning the valve conical surface, and a bearing assembly is arranged between the conical surface positioning sliding seat and the conical surface positioning sliding sleeve to ensure that the sliding seat does not rotate along with the sliding sleeve.

3. The spindle positioning device for an engine valve according to claim 1, wherein the cone positioning device comprises a cone positioning slide, a cone positioning slide sleeve, a cone positioning rear end cap, a cone positioning locking bearing, a cone positioning angular contact bearing set, and a cone positioning front end cap,

the conical surface positioning driving device comprises an oil cylinder, a support, a lathe bed connecting piece, a guide rail assembly and a conical surface positioning device mounting seat; the oil cylinder is arranged on a bracket, the bracket is movably connected with the lathe bed connecting piece through a guide rail component, the conical surface positioning device mounting seat is fixedly arranged at one end of the guide rail component,

the conical surface positioning slide seat is connected with the conical surface positioning device mounting seat which is fixedly arranged on one end of the guide rail component, the oil cylinder is used for driving the conical surface positioning device mounting seat to move so as to drive the conical surface positioning sleeve to axially move, so that the conical surface positioning sleeve is contacted with the conical surface of the valve, the bed body connecting piece is fixedly arranged on the bed body, so that the conical surface positioning driving device is arranged on the bed body, two ends of the support frame are transversely arranged on the guide rail component,

the conical surface positioning locking bearing and the conical surface positioning angular contact bearing group are arranged between the conical surface positioning sliding seat and the conical surface positioning sliding sleeve, the locking bearing is used for limiting the sliding seat so as to prevent the sliding seat from rotating along with the sliding sleeve, and the angular contact bearing group is used for ensuring that the sliding sleeve can rotate; the front and the back of the sliding seat are respectively provided with a conical surface positioning rear end cover and a conical surface positioning front end cover, a conical surface positioning sleeve is arranged at the front end of the positioning front end cover, the front end of a positioning rod component is arranged in the sliding sleeve, and the conical surface positioning rear end cover, the conical surface positioning locking bearing, the conical surface positioning angle contact bearing and the conical surface positioning front end cover are arranged on the conical surface positioning sliding sleeve.

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