CN110860701B

CN110860701B - Inclined-lathe-bed double-spindle numerical control lathe

Info

Publication number: CN110860701B
Application number: CN201911182661.XA
Authority: CN
Inventors: 汪博强; 汪传宏; 汪洋; 王小玲; 饶贝宁
Original assignee: Chongqing Honggang CNC Machine Tool Co Ltd
Current assignee: Chongqing Honggang CNC Machine Tool Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2021-01-01
Anticipated expiration: 2039-11-27
Also published as: CN110860701A

Abstract

The invention belongs to the technical field of numerical control machine tools, and particularly relates to an inclined lathe bed double-spindle numerical control lathe which comprises a protective cover, wherein an inclined lathe bed is arranged in the protective cover, and a first spindle assembly and a saddle assembly are arranged on the inclined lathe bed; two saddle guide rails and two second main shaft guide rails are arranged on the guide rail mounting surface of the inclined lathe bed, sliding blocks are connected to the saddle guide rails and the second main shaft guide rails in a sliding mode, and a saddle assembly is connected to the saddle guide rails in a sliding mode through the sliding blocks; the second spindle guide rail is connected with a second spindle assembly which is arranged opposite to the first spindle assembly in a sliding manner through a sliding block; an oil cavity, an oil outlet cylinder and a power mechanism are arranged in the sliding block, and a piston is connected in the oil outlet cylinder in a sliding manner; a channel is connected between the oil outlet cylinder and the oil cavity, and a one-way oil inlet valve is arranged on the channel; the oil outlet cylinder is provided with a one-way oil outlet valve, and the lower part of the sliding block is provided with a plurality of oil outlets. The numerical control lathe can finish machining of two ends of the workpiece by clamping the workpiece once, and machining efficiency can be improved.

Description

Inclined-lathe-bed double-spindle numerical control lathe

Technical Field

The invention belongs to the technical field of numerical control machine tools, and particularly relates to an inclined-lathe-body double-spindle numerical control lathe.

Background

The slant-bed numerically controlled lathe is a high-precision and high-efficiency automatic lathe. The multi-station tool turret or the power tool turret is equipped, so that the machine tool has wide technological performance, can machine complex workpieces such as linear cylinders, oblique line cylinders, circular arcs and various threads, grooves, worms and the like, has various compensation functions of linear interpolation and circular arc interpolation, and plays a good economic effect in the batch production of complex parts. The numerical control lathe with the inclined lathe bed has the advantages of good stability, improvement of space utilization rate, convenience in chip removal and the like, and is widely applied to various machining fields at present.

The existing slant-bed numerically controlled lathe is generally only provided with a main shaft assembly, and after a part to be machined is clamped on the main shaft assembly, a cutter in a tool turret performs turning on the part. According to the actual use requirement, both ends of a part of shaft parts are machined, the existing slant-bed numerically-controlled lathe is used for machining, the parts are required to be detached from the spindle assembly firstly after one end of each part is machined, then the other end of each part is clamped, and the other end of each part is turned by the cutter. By adopting the processing mode, the part needs to be clamped for many times, so that the precision of the processed part is low. Besides the defects, the guide rail on the existing slant-bed numerically controlled lathe needs to bear the gravity of a saddle assembly, a tailstock assembly and the like, the borne acting force is large, and meanwhile, because the top plane position of the guide rail is high, flowing lubricating oil is generally difficult to flow through the top plane of the guide rail, so that the guide rail is not enough in lubrication, and the abrasion of the guide rail is accelerated.

Disclosure of Invention

The invention aims to provide a double-spindle numerical control lathe with an inclined lathe bed to solve the problems of reduced precision of parts and insufficient lubrication of guide rails caused by the fact that the parts need to be clamped for multiple times.

In order to achieve the purpose, the scheme of the invention is as follows: the slant-bed double-spindle numerical control lathe comprises a hydraulic station, a cooling system, a protective cover and a programmable control panel, wherein a slant bed is arranged in the protective cover, and a first spindle assembly and a saddle assembly are arranged on the slant bed; two saddle guide rails and two second main shaft guide rails are arranged on the guide rail mounting surface of the inclined lathe bed, sliding blocks are connected to the saddle guide rails and the second main shaft guide rails in a sliding mode, and a saddle assembly is connected to the saddle guide rails in a sliding mode through the sliding blocks; the second spindle guide rail is connected with a second spindle assembly which is arranged opposite to the first spindle assembly in a sliding manner through a sliding block; an oil cavity, an oil outlet cylinder and a power mechanism are arranged in the sliding block, a piston is connected in the oil outlet cylinder in a sliding mode, and the power mechanism is used for driving the piston to slide; a channel is connected between the oil outlet cylinder and the oil cavity, and a one-way oil inlet valve is arranged on the channel; the oil outlet cylinder is provided with a one-way oil outlet valve, and the lower part of the sliding block is provided with a plurality of oil outlets which can be communicated with the one-way oil outlet valve.

The working principle and the beneficial effects of the scheme are as follows: two main shaft assemblies, namely a first main shaft assembly and a second main shaft assembly are arranged in the scheme, and the machining of two ends of a workpiece can be completed by clamping the workpiece once, so that the problem that the machining precision of the part is low due to multiple times of clamping can be effectively avoided while the machining efficiency is improved. The sliding block is further provided with an oil cavity, an oil outlet cylinder, a power mechanism and other structures, the power mechanism drives the piston to slide, when the piston slides to one side far away from the oil outlet cylinder, the pressure in the oil outlet cylinder is reduced, the one-way oil inlet valve is automatically opened, and lubricating oil in the oil cavity can be transferred to the oil outlet cylinder through the channel. When the piston slides in the opposite direction, the pressure in the oil outlet cylinder is increased, the one-way oil drain valve is automatically opened, the lubricating oil in the oil outlet cylinder flows to the oil outlet and is finally transferred to the surface of the saddle guide rail through the oil outlet (only a sliding block on the saddle guide rail is taken as an example for explanation here), the lubricating effect of the saddle guide rail is greatly enhanced, and the abrasion progress of the saddle guide rail is effectively slowed down.

Optionally, the oil chamber is arranged at the upper part of the slide block and is positioned above the oil outlet cylinder. In the operation process, the lubricating oil in the oil cavity is gradually reduced, namely the weight of the sliding block is reduced in the movement process, the oil cavity is arranged at the upper part of the sliding block instead of at any side of the sliding block, and the problem that the sliding block is not stable in operation due to overlarge weight difference of the two sides of the sliding block can be avoided.

Optionally, the plurality of oil outlets are distributed along a width direction of the slider, and the width direction of the slider is perpendicular to a moving direction of the slider. The oil outlet is arranged in such a way, so that the sliding block can be uniformly coated on the surface of the saddle guide rail in the sliding process, and the lubricating effect is improved.

Optionally, the oil outlet is rotatably connected with a ball, and a gap of 0.15-0.3mm exists between the ball and the oil outlet. Proved by verification, a gap of 0.15-0.3mm is arranged between the ball and the oil outlet, so that the surface of the ball is always coated with a layer of oil film, the abrasion between the ball and the saddle guide rail is effectively reduced, meanwhile, the lubricating oil is more effectively prevented from being quickly discharged through the oil outlet, the lubricating oil is excessively discharged, and the waste is caused,

optionally, the ball is provided with an annular dovetail groove distributed along the circumference of the ball, the oil outlet is provided with two oppositely arranged clamping blocks, and the clamping blocks are clamped in the annular dovetail groove. The arrangement of the annular dovetail groove and the fixture block can effectively prevent the ball from separating from the oil outlet.

Optionally, an oil applying layer is arranged on the oil outlet, and the oil applying layer is a sponge layer. The sponge layer is arranged, and lubricating oil flowing to the oil outlet can be smeared on the saddle guide rail through the sponge layer.

Optionally, the longitudinal section of the sliding block is in an inverted concave shape, the inner walls of two opposite sides of the sliding block are rotatably connected with rotating balls, and the one-way oil drain valve is communicated with the rotating balls. The slider sets up to "concave" shape, and the scheme is installed and is dismantled. The rotating balls are arranged on the inner walls of the two opposite sides of the sliding block, so that sliding friction between the sliding block and the side wall of the saddle guide rail is changed into rolling friction, and abrasion is effectively reduced. The oil drain valve is communicated with the rotating ball, and lubricating oil discharged from the oil drain valve can be transferred to the rotating ball, so that abrasion between the sliding block and the saddle guide rail is further reduced.

Optionally, the power mechanism comprises a rotating shaft rotatably connected in the sliding block, a first gear fixed on the rotating shaft, and a first rack capable of being meshed with the first gear, the first rack is arranged on the inclined bed body, and a cam for driving the piston to reciprocate is fixed on the rotating shaft; an elastic part is connected between the piston and the oil outlet cylinder.

The sliding block drives the first gear to move together when moving, when the first gear is meshed with the first rack, the first rack enables the first gear to rotate in the moving process, the rotating shaft in the sliding block and the cam on the rotating shaft rotate along with the first gear, and the piston is driven to slide in a reciprocating mode along the oil outlet cylinder in the rotating process of the cam.

Optionally, the power mechanism comprises a threaded rod rotatably connected in the sliding block, a second gear fixed on the threaded rod and a second rack meshed with the second gear, the second rack is arranged on the inclined lathe bed, and the threaded rod penetrates through the piston and is in threaded connection with the piston; a limiting part for limiting the rotation of the piston is arranged in the oil outlet cylinder.

The slider drives the second gear to move together when moving in one direction, and when the second gear is meshed with the second rack, the second rack enables the second gear to rotate in the moving process, and the threaded rod in the slider rotates along with the second gear in the fixed direction. And under the driving of the threaded rod, the piston on the threaded rod moves towards the fixed direction. When the sliding block moves in the opposite direction, the rotating directions of the second gear and the threaded rod are changed, and the piston on the threaded rod moves in the opposite direction and resets.

Optionally, the limiting member is a bar-shaped protrusion distributed along the length direction of the piston cylinder, and the piston is provided with a groove engaged with the bar-shaped protrusion.

Drawings

FIG. 1 is a schematic perspective view of an internal structure of a slant-bed double-spindle numerically controlled lathe according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a slide block portion of a slant-bed double-spindle numerically controlled lathe according to an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a sectional view of a slide block portion of a slant-bed double-spindle numerically controlled lathe according to a second embodiment of the present invention;

FIG. 5 is a cross-sectional view of a slide block portion of a slant-bed double-spindle numerically controlled lathe according to a third embodiment of the present invention;

fig. 6 is an enlarged view of a portion B in fig. 5.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the lathe comprises a slant lathe bed 10, a saddle guide rail 11, a second spindle guide rail 12, a first spindle assembly 20, a second spindle assembly 30, a saddle assembly 40, a slide block 50, an oil chamber 51, a rotating ball 52, a ball 53, an annular dovetail groove 531, a sponge layer 54, a rotating shaft 60, a cam 61, a first gear 62, an oil outlet cylinder 70, an elastic element 71, a piston 72, a channel 73, a one-way oil inlet valve 731, a flow channel 74, a one-way oil outlet valve 741, a threaded rod 80 and a second gear 81.

Example one

This embodiment is substantially as shown in fig. 1: the slant-bed double-spindle numerically controlled lathe comprises a hydraulic station, a cooling system, a protective cover and a programmable control board, wherein a door capable of being opened and closed is arranged on the protective cover. The inclined lathe bed 10 is installed in the protective cover, the first spindle assembly 20, the second spindle assembly 30 and the saddle assembly 40 are arranged on the inclined lathe bed 10, the specific structures of the first spindle assembly 20 and the second spindle assembly 30 are similar, the first spindle assembly 20 and the saddle assembly 40 are both existing devices, and detailed structures of the first spindle assembly 20 and the saddle assembly 40 are not repeated herein. Two saddle guide rails 11 and two second spindle guide rails 12 are further fixedly mounted on the guide rail mounting surface of the slant bed 10, sliders 50 are slidably connected to the saddle guide rails 11 and the second spindle guide rails 12, the saddle assembly 40 is slidably connected to the two saddle guide rails 11 through the sliders 50, the second spindle assembly 30 is also slidably connected to the two second spindle guide rails 12 through the sliders 50, and the first spindle assembly 20 and the second spindle assembly 30 are arranged oppositely.

In this embodiment, only the slider 50 on the saddle rail 11 is taken as an example for detailed description, and the structure of the slider 50 on the second spindle rail 12 is also consistent, so that repeated description is omitted. As shown in fig. 2 and 3, the longitudinal section of the slider 50 is in an inverted "concave" shape, and the rotating balls 52 are rotatably connected to the inner walls of the opposite sides of the slider 50, and the rotating balls 52 can contact the side walls of the saddle rail 11. An oil cavity 51, an oil outlet cylinder 70 and a power mechanism arranged on the left side of the oil outlet cylinder 70 are arranged in the slider 50, the oil cavity 51 is arranged in the upper part of the slider 50 and is positioned above the oil outlet cylinder 70, and lubricating oil is stored in the oil cavity 51. A piston 72 capable of reciprocating right and left is slidably and hermetically connected to the oil outlet cylinder 70, and an elastic member 71 is connected between a right side wall of the piston 72 and a side wall of the oil outlet cylinder 70, and the elastic member 71 is a spring in this embodiment. A passage 73 is connected between the lower portion of the oil chamber 51 and the upper portion of the oil outlet cylinder 70, a one-way oil inlet valve 731 is installed on the passage 73, the one-way oil inlet valve 731 is automatically opened when the pressure inside the oil outlet cylinder 70 is reduced, and the lubricating oil in the oil chamber 51 can be transferred to the oil outlet cylinder 70 through the passage 73. The lower part of the oil outlet cylinder 70 is provided with a one-way oil discharge valve 741; the lower portion of the slider 50 is provided with a plurality of oil outlets opposite to the upper surface of the saddle rail 11, and the plurality of oil outlets are distributed along the width direction of the slider 50, in this embodiment, the width direction of the slider 50 refers to the direction perpendicular to the moving direction of the slider 50. A flow passage 74 and an oil passage are arranged in the slider 50, the flow passage 74 communicates the oil outlet with the one-way oil drain valve 741, and the oil passage communicates the one-way oil drain valve 741 with the rotating ball 52. When the pressure in the oil outlet cylinder 70 increases, the one-way oil drain valve 741 is automatically opened, and the lubricating oil in the oil outlet cylinder 70 can flow to the oil outlet and the rotating ball 52 through the flow passage 74 and the oil passage, respectively.

The oil outlet is rotatably connected with a ball 53, the ball 53 is provided with an annular dovetail groove 531 distributed along the circumferential direction of the ball 53, and the rolling direction of the annular dovetail groove 531 is consistent with the moving direction of the slider 50; two clamping blocks which are oppositely arranged are arranged on the oil outlet and clamped in the annular dovetail groove 531, and the arrangement of the annular dovetail groove 531 and the clamping blocks can effectively prevent the ball 53 from separating from the oil outlet. A gap of 0.15-0.3mm exists between the ball 53 and the oil outlet, in the embodiment, the gap between the ball 53 and the oil outlet is 0.2mm, lubricating oil at the oil outlet is soaked on each surface of the ball 53 in the rolling process of the ball 53, and the ball 53 can effectively transfer the lubricating oil to the upper surface of the saddle guide rail 11 in the rolling process of the ball 53.

The power mechanism comprises a rotating shaft 60, a first gear 62 and a first rack which can be meshed with the first gear 62, the rotating shaft 60 is rotatably connected in the sliding block 50, the first gear 62 is fixed on the rotating shaft 60, the first rack is fixedly arranged on the slant bed 10, and the length of the first rack is reasonably set according to actual needs. The rotating shaft 60 is further welded with a cam 61 arranged opposite to the piston 72, and the cam 61 contacts with the piston 72 in the rotating process.

When the inclined lathe bed double-spindle numerical control lathe works, the sliding block 50 can slide according to the machining requirement. When the slide block 50 moves, the first gear 62 is driven to move together, when the first gear 62 moves to be meshed with the first rack, the first rack enables the first gear 62 to rotate in the moving process, the rotating shaft 60 in the slide block 50 and the cam 61 on the rotating shaft 60 rotate together with the first gear 62, and the piston 72 is driven to slide back and forth along the oil outlet cylinder 70 in the rotating process of the cam 61. When the piston 72 slides to the side away from the oil outlet cylinder 70, the pressure inside the oil outlet cylinder 70 decreases, the one-way oil inlet valve 731 is automatically opened, and the lubricating oil in the oil chamber 51 can be transferred to the oil outlet cylinder 70 through the passage 73. When the piston 72 slides in the opposite direction, the pressure in the oil outlet cylinder 70 is increased, the one-way oil drain valve 741 is automatically opened, the lubricating oil in the oil outlet cylinder 70 flows to the rotating ball 52 and the ball 53 of the oil outlet through the oil passage and the flow passage 74, and in the rolling process of the ball 53 and the rotating ball 52, the ball 53 and the rotating ball 52 transfer the lubricating oil to the surface of the saddle guide rail 11, so that the lubricating effect of the saddle guide rail 11 is greatly enhanced, and the wear progress of the saddle guide rail 11 is effectively slowed down.

Example two

The present embodiment is different from the first embodiment in that: as shown in fig. 4, in the present embodiment, an oil applying layer is fixed at the oil outlet, in the present embodiment, the oil applying layer is a sponge layer 54, and the lubricating oil flowing out from the oil outlet cylinder 70 is applied on the surface of the saddle rail 11 through the sponge layer 54.

EXAMPLE III

The present embodiment is different from the first embodiment in that: as shown in fig. 5 and 6, the direction of the oil outlet cylinder 70 and the specific structure of the power mechanism are different from those of the first embodiment. In this embodiment, the opening of the oil outlet cylinder 70 faces downward, and the piston 72 can slide up and down reciprocally along the inner wall of the oil outlet cylinder 70. The power mechanism comprises a threaded rod 80, a second gear 81 and a second rack meshed with the second gear 81, the threaded rod 80 is rotatably connected in the sliding block 50, the second gear 81 is welded on the threaded rod 80, the first rack is fixedly installed on the inclined lathe bed 10, and the length of the second rack can be reasonably set according to actual needs. Threaded rod 80 passes through piston 72 and is in threaded connection with piston 72; a limiting member for limiting the rotation of the piston 72 is fixed in the oil outlet cylinder 70, in this embodiment, the limiting member is a strip-shaped protrusion distributed along the length direction of the piston 72, and a groove engaged with the strip-shaped protrusion is formed on the piston 72.

When the sliding block 50 moves in one direction, the sliding block drives the second gear 81 to move together, when the second gear 81 is meshed with the second rack, the second rack enables the second gear 81 to rotate in the moving process, and the threaded rod 80 in the sliding block 50 rotates along with the second gear 81 in the fixed direction. When the piston 72 slides to the side away from the oil outlet cylinder 70, the pressure inside the oil outlet cylinder 70 decreases, the one-way oil inlet valve 731 is automatically opened, and the lubricating oil in the oil chamber 51 can be transferred to the oil outlet cylinder 70 through the passage 73. When the slide block 50 moves in the opposite direction, the rotation directions of the second gear 81 and the threaded rod 80 are changed, the piston 72 on the threaded rod 80 moves in the opposite direction and returns to the original position, at this time, the piston 72 slides to the side away from the oil outlet cylinder 70, the pressure in the oil outlet cylinder 70 is increased, the one-way oil drain valve 741 is automatically opened, the lubricating oil in the oil outlet cylinder 70 flows to the rotating ball 52 and the ball 53 of the oil outlet through the oil passage and the flow passage 74, and the ball 53 and the rotating ball 52 transfer the lubricating oil to the surface of the saddle guide rail 11 in the rolling process of the ball 53 and the rotating ball 52.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.

Claims

1. The slant-bed double-spindle numerical control lathe comprises a hydraulic station, a cooling system, a protective cover and a programmable control panel, wherein a slant bed is arranged in the protective cover, and a first spindle assembly and a saddle assembly are arranged on the slant bed; two saddle guide rails and two second main shaft guide rails are arranged on the guide rail mounting surface of the inclined lathe bed, sliding blocks are connected to the saddle guide rails and the second main shaft guide rails in a sliding mode, and a saddle assembly is connected to the saddle guide rails in a sliding mode through the sliding blocks; the method is characterized in that: the second spindle guide rail is connected with a second spindle assembly which is arranged opposite to the first spindle assembly in a sliding manner through a sliding block; an oil cavity, an oil outlet cylinder and a power mechanism are arranged in the sliding block, a piston is connected in the oil outlet cylinder in a sliding mode, and the power mechanism is used for driving the piston to slide; the power mechanism comprises a threaded rod rotatably connected in the sliding block, a second gear fixed on the threaded rod and a second rack meshed with the second gear, the second rack is arranged on the inclined lathe bed, and the threaded rod penetrates through the piston and is in threaded connection with the piston; a limiting piece for limiting the rotation of the piston is arranged in the oil outlet cylinder; a channel is connected between the oil outlet cylinder and the oil cavity, and a one-way oil inlet valve is arranged on the channel; the oil outlet cylinder is provided with a one-way oil outlet valve, and the lower part of the sliding block is provided with a plurality of oil outlets which can be communicated with the one-way oil outlet valve; the oil outlets are distributed along the width direction of the sliding block, and the width direction of the sliding block is vertical to the moving direction of the sliding block; the oil outlet is rotatably connected with a ball, and a gap of 0.15-0.3mm is formed between the ball and the oil outlet; the ball is provided with an annular dovetail groove distributed along the circumference of the ball, the oil outlet is provided with two oppositely arranged clamping blocks, and the clamping blocks are clamped in the annular dovetail groove.

2. The inclined-lathe-body double-spindle numerically controlled lathe according to claim 1, characterized in that: the oil cavity is arranged at the upper part of the slide block and is positioned above the oil outlet cylinder.

3. The inclined-lathe-body double-spindle numerically controlled lathe according to claim 1, characterized in that: an oil applying layer is arranged on the oil outlet and is a sponge layer.

4. The inclined-lathe-body double-spindle numerically controlled lathe according to claim 2, characterized in that: the longitudinal section of the sliding block is in an inverted concave shape, the inner walls of two opposite sides of the sliding block are rotatably connected with rotating balls, and the one-way oil drain valve is communicated with the rotating balls.

5. The inclined-lathe-body double-spindle numerically controlled lathe according to claim 1, characterized in that: the locating part is the bar arch that distributes along piston barrel length direction, and it has the recess with the protruding block of bar to open on the piston.