CN218015998U

CN218015998U - Full-automatic double-head milling machine for machining large-scale die

Info

Publication number: CN218015998U
Application number: CN202222133856.9U
Authority: CN
Inventors: 廖家林; 许劲兵
Original assignee: Shenzhen Xiongxing Industry Co ltd
Current assignee: Shenzhen Xiongxing Industry Co ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2022-12-13
Anticipated expiration: 2032-08-12

Abstract

The utility model relates to the technical field of milling machine workpiece positioning, and discloses a full-automatic double-end milling machine for large-scale die machining, which comprises a milling machine body, a workbench, a clamping component and two milling cutter components, the workbench is connected to the milling machine body in a sliding manner, the upper surface of the workbench is rotatably connected with an objective table, the clamping component is fixedly connected to the workbench and used for clamping blanks, the two milling cutter components are respectively connected to two sides of the milling machine body in the sliding direction of the workbench, the upper surface of the objective table is fixedly connected with a plurality of weight sensors, the weight sensors are uniformly distributed along the circumferential direction of a rotating shaft of the objective table, the blanks are placed on the upper surface of the weight sensors, the weight sensors are connected with a buzzer, and the buzzer is electrically connected with a control circuit used for controlling the buzzer to sound when the pressure applied to the weight sensors is detected to be smaller than a preset threshold value; this application has the effect that improves the location efficiency of large-scale mould blank.

Description

Full-automatic double-end milling machine for machining large-scale die

Technical Field

The application relates to the technical field of milling machine workpiece positioning, in particular to a full-automatic double-head milling machine for large-scale die machining.

Background

In order to improve the milling efficiency of a workpiece and simultaneously reduce the problem of large form and position tolerance of a finished product caused by repeated clamping of the workpiece, a double-head milling machine is widely used for processing large-sized workpieces at present.

In the milling process of the large-sized die, the positioning and clamping precision of the die blank is very important for the size and tolerance precision of the final finished product of the large-sized die, when the large-sized die is milled, the blank needs to be placed on a workbench firstly, the initial position of the blank needs to be adjusted and then clamped, the blank of the large-sized die has the characteristics of large volume and heavy mass, and the difficulty in accurately adjusting the position of a workpiece on the workbench of a double-head milling machine is high.

According to the related art described above, the inventors consider that there is a problem in that it is difficult to position a blank of a large die.

SUMMERY OF THE UTILITY MODEL

In order to improve the positioning efficiency of large-scale mould blank, the application provides a full-automatic double-end milling machine for large-scale mould processing.

The technical problem to be solved by the application is realized by adopting the following technical scheme:

the utility model provides a full-automatic double-end milling machine for large-scale mould processing, includes milling machine body, workstation, centre gripping subassembly and two milling cutter subassembly, workstation sliding connection is in milling machine body, the workstation upper surface rotates and is connected with the objective table, centre gripping subassembly fixed connection is in the workstation for the centre gripping blank, two milling cutter subassemblies are connected respectively in the milling machine body and are located the both sides of workstation slip direction, the last fixed surface of objective table is connected with a plurality of weighing transducer, and is a plurality of weighing transducer is along the revolving axle circumference evenly distributed of objective table, and the blank is placed in weighing transducer's upper surface, weighing transducer is connected with bee calling organ, bee calling organ electricity is connected with and is used for controlling bee calling organ to sound when detecting weighing transducer pressure that receives and being less than preset threshold value.

Through the technical scheme, the workbench is connected to the milling machine body in a sliding manner, the upper surface of the workbench is rotatably connected with the object stage, the object stage is used for placing the blank, the workbench is further provided with a clamping assembly used for clamping the blank so as to fixedly connect the blank to the object stage, and the blank can be conveniently moved through the sliding of the workbench during milling; the objective table is rotationally connected with the workbench, so that the function of milling multiple surfaces of the blank can be realized through one-time clamping, and the tolerance possibly caused by re-clamping is reduced; the two milling cutter assemblies are respectively connected to two sides of the milling machine body in the sliding direction of the workbench and are used for realizing the function of simultaneously milling two surfaces of a blank in cooperation with the sliding of the workbench; the upper surface of the objective table is provided with a plurality of weight sensors which are uniformly distributed along the circumferential direction of a rotating shaft of the objective table, blanks are placed on the upper surface of the weight sensors, the weight sensors are connected with buzzers, the buzzers are fixedly connected with a control circuit which is used for controlling the buzzers to sound when the pressure applied to the weight sensors is smaller than a preset threshold value, when the blanks are clamped, if the projection of the placing positions of the blanks on the objective table deviates from the central position of the objective table too much, the pressure applied to each weight sensor is inconsistent, so that the buzzers on the corresponding weight sensors are controlled to sound when the pressure applied to part of the weight sensors is detected to be smaller than the preset threshold value, and therefore personnel for prompting the clamping of the blanks can move the blanks according to the positions of the weight sensors sounded by the buzzers, the positions of the blanks are located right above the objective table, and the positioning efficiency of large-size die blanks is improved.

Preferably, the weight sensor is provided with a force-sensitive resistor RA for detecting the pressure of the weight sensor by the blank, and the control circuit includes:

the offset detection and comparison module is used for detecting the pressure applied to the force-sensitive resistor RA and generating a pressure detection signal, and the offset detection and comparison module is provided with a pressure reference signal so as to send out a pressure comparison signal when the pressure detection signal is smaller than the pressure reference signal;

the pressure switch module is electrically connected with the deviation detection comparison module to send out a pressure switch signal when receiving the pressure comparison signal;

and the pressure execution module is electrically connected with the pressure switch module and is connected in series in a power supply loop of the buzzer so as to send out a pressure execution signal when receiving the pressure switch signal and control the buzzer to sound.

Through the technical scheme, each buzzer is electrically connected with a control circuit for controlling the buzzer to sound, wherein the weight sensor is provided with a force sensitive resistor RA for detecting the pressure of the weight sensor from a blank, the offset detection comparison module detects the pressure of the force sensitive resistor RA from the blank and outputs a pressure detection signal, the pressure detection signal is compared with a built-in pressure reference signal, when the pressure detection signal is smaller than the pressure reference signal, the pressure detection signal sends a pressure comparison signal to the pressure switch module, the pressure switch module sends a pressure switch signal to the pressure execution module, the pressure execution module sends a pressure execution signal to communicate with a power supply circuit of the buzzer, the buzzer sounds, and therefore when the blank is detected not to be placed above a certain weight sensor or the pressure applied to the certain weight sensor by the blank is smaller than a preset threshold value, the buzzer is controlled to sound, a worker who clamps the blank conveniently adjusts the position of the blank according to the position of the weight sensor corresponding to the sounded buzzer, and the blank is located right above a carrying platform as far as possible.

Preferably, milling cutter subassembly includes the casing, fixed connection mills the motor in having, the drive shaft that mills the motor extends the casing towards another milling cutter subassembly's direction, the one end fixedly connected with cutter that the casing was extended to the drive shaft, the first distancer of casing still fixedly connected with and second distancer, the range finding direction of first distancer and second distancer all is on a parallel with the drive shaft setting, the workstation is provided with and is used for driving objective table pivoted positioning motor, the positioning motor electricity is connected with and is used for surveying the difference adjustment objective table pivoted gyration positioning circuit of distance value according to first distancer and second distancer.

According to the technical scheme, the milling cutter assembly comprises a shell and a milling motor fixedly connected in the shell, wherein a driving shaft of the milling motor extends out of the shell and extends out of the shell towards the other milling cutter assembly, and one end, extending out of the shell, of the driving shaft is fixedly connected with a cutter for milling, so that a full-automatic double-head milling machine used for large-scale die machining can mill two surfaces of a blank at the same time, and the milling efficiency can be improved; the workstation is provided with and is used for driving objective table pivoted location electrical apparatus, and the positioning motor electricity is connected with and is used for adjusting objective table pivoted gyration positioning circuit, the first distancer of casing still fixedly connected with and second distancer, and the range finding direction of first distancer and second distancer all is on a parallel with the drive shaft setting, be convenient for measure the distance between first distancer and second distancer and the blank respectively, and then be convenient for based on the difference control positioning motor rotation of the distance value that first distancer and second distancer measured, thereby realize adjusting the lateral wall of blank to the direction of perpendicular to drive shaft, in order to further improve the precision of blank location.

Preferably, the slewing positioning circuit includes:

the distance detection and comparison module is used for detecting a first distance value measured by the first distance meter and a second distance value measured by the second distance meter, and is provided with a second reference signal Vref2 used for comparing with the first distance value and a first reference signal Vref1 used for comparing with the second distance value, so that a first comparison signal is sent out when the first distance value is larger than the second reference signal Vref2, and a second comparison signal is sent out when the second distance value is larger than the first reference signal Vref1, wherein the value of the first reference signal Vref1 is the sum of the first distance value and an error allowable value, and the value of the second reference signal Vref2 is the sum of the second distance value and the error allowable value;

the first switch module is electrically connected to the distance detection comparison module and is used for sending a first switch signal when receiving the first comparison signal;

the first execution module is electrically connected with the first switch module and is connected in series in a forward power supply loop of the positioning motor so as to send out a first execution signal when receiving the first switch signal and communicate the forward power supply loop of the positioning motor;

the second switch module is electrically connected to the distance detection comparison module and is used for sending a second switch signal when receiving the second comparison signal;

and the second execution module is electrically connected with the second switch module and is connected in series in the reverse power supply loop of the positioning motor so as to send out a second execution signal when receiving the second switch signal and communicate the reverse power supply loop of the positioning motor.

Through the technical scheme, the positioning motor is electrically connected with a rotary positioning circuit for adjusting the rotation of the objective table, wherein the distance detection comparison module detects a first distance value measured by the first distance meter and a second distance value measured by the second distance meter, compares the first distance value with a second reference signal Vref2, and compares the second distance value with a first reference signal Vref1, wherein the value of the first reference signal Vref1 is the sum of the first distance value and an error allowable value, and the value of the second reference signal Vref2 is the sum of the second distance value and the error allowable value, when the first distance value is greater than the second reference signal Vref2, sends a first comparison signal to the first switch module, so that the first switch module sends a first switch signal to the first execution module, and further the first execution module sends a first execution signal to communicate a forward power supply loop of the positioning motor, so that the positioning motor rotates forward; when the second distance value is larger than the first reference signal Vref1, a second comparison signal is sent to the second switch module, the second switch module sends a second switch signal to the second execution module, and the second execution module sends a second execution signal to communicate with a reverse power supply loop of the positioning motor, so that the positioning motor rotates reversely; therefore, when the difference value between the first distance value and the second distance value is larger than the error allowable value, the positioning motor is automatically started to rotate so as to adjust the side wall of the blank to the direction perpendicular to the driving shaft, and the automation level of blank positioning is improved.

Preferably, the offset detection and comparison module includes a force-sensitive resistor RA and a first resistor R1, which are used for detecting the pressure applied to the weight sensor, the force-sensitive resistor RA is installed on one surface of the weight sensor contacting the blank, one end of the force-sensitive resistor RA is grounded, the other end of the force-sensitive resistor RA is connected in series with the first resistor R1 and then electrically connected to a power supply voltage VCC, and a connection node of the force-sensitive resistor RA and the first resistor R1 is connected to the pressure switch module.

Through the technical scheme, the force-sensitive resistor RA is used for detecting the pressure borne by the weight sensor, when the pressure borne by the weight sensor is larger, the resistance value of the force-sensitive resistor RA is a pressure detection signal, the resistance value of the first resistor R1 is a pressure reference signal, when the resistance value of the force-sensitive resistor RA is larger than the first resistor R1, the voltage at the two ends of the force-sensitive resistor RA is larger than the voltage at the two ends of the first resistor R1, and a high level is output to the pressure switch module at the connection node of the force-sensitive resistor RA and the first resistor R1; when the resistance value of the force-sensitive resistor RA is smaller than the first resistor R1, the voltage at two ends of the force-sensitive resistor RA is smaller than the voltage at two ends of the first resistor R1, and a low-level pressure comparison signal is output to the pressure switch module at the connection node of the force-sensitive resistor RA and the first resistor R1; the offset detection comparison module changes an output signal according to the resistance value of the force sensitive resistor RA relative to the resistance value of the first resistor R1, so that a comparison function is realized.

Preferably, the distance detection and comparison module includes a first distance meter, a second distance meter, a Vref1 signal generator, a Vref2 signal generator, a first comparator N1 and a second comparator N2, the first distance meter is configured to detect a first distance value, the second distance meter is configured to detect a second distance value, a signal output end of the first distance meter is electrically connected to a forward input end of the first comparator N1 and a signal input end of the Vref1 signal generator, a signal output end of the second distance meter is electrically connected to a forward input end of the second comparator N2 and a signal input end of the Vref2 signal generator, a signal output end of the Vref1 signal generator is electrically connected to a reverse input end of the first comparator N1, a signal output end of the Vref2 signal generator is electrically connected to a reverse input end of the second comparator N2, a signal output end of the first comparator N1 is electrically connected to the first switch module after being connected to the third resistor R3 in series, and a signal output end of the second comparator N2 is electrically connected to the second switch module after being connected to the fifth resistor R5 in series.

Through the technical scheme, the first distance meter and the second distance meter are respectively used for detecting a first distance value and a second distance value between the first distance meter and the blank, the first distance meter is electrically connected to a forward input end of a first comparator N1 and a signal input end of a Vref1 signal generator so as to send the detected first distance value to the first comparator N1 and the Vref1 signal generator, the Vref1 signal generator forms a first reference signal Vref1 according to the sum of the first distance value and an error allowable value, and a signal output end of the Vref1 signal generator is electrically connected to a reverse output end of a second comparator N2 so as to send the first reference signal Vref1 to a second comparator N2; the second distance meter is electrically connected with the positive input end of the second comparator N2 and the signal input end of the Vref2 signal generator so as to send the detected second distance value to the second comparator N2 and the Vref2 signal generator, the Vref2 signal generator forms a second reference signal Vref2 according to the sum of the second distance value and the error allowable value, and the signal output end of the Vref2 signal generator is electrically connected with the reverse output end of the first comparator N1 so as to send the second reference signal Vref2 to the first comparator N1; to implement the function of detecting whether the difference between the first distance value and the second distance value is greater than the error allowance value.

Preferably, the rotation positioning circuit further comprises a positioning switch module, the positioning switch module comprises a switch S2-1 and a switch S2-2, one end of the switch S2-1 is electrically connected to the signal output end of the first comparator N1, the other end of the switch S2-1 is electrically connected to the first switch module after being electrically connected to the third resistor R3 in series, one end of the switch S2-2 is electrically connected to the signal output end of the second comparator N2, the other end of the switch S2-2 is electrically connected to the second switch module after being electrically connected to the fifth resistor R5 in series, and the switch S2-1 and the switch S2-2 are linked switches.

According to the technical scheme, the rotary positioning circuit further comprises a positioning switch module for controlling whether the function of the rotary positioning circuit is started or not, and when the switch S2-1 and the switch S2-2 are closed, the rotary positioning circuit can detect whether the difference value between the first distance value and the second distance value is larger than an error allowable value or not and control the positioning motor to adjust the rotation of the objective table; after the blank is positioned, the switch S2-1 and the switch S2-2 can be switched off to close and compare the difference value of the first distance value and the second distance value so as to control the positioning motor to adjust the rotation function of the objective table, so that the function of triggering the positioning motor to adjust the rotation function of the objective table when the blank normally rotates in the milling process is prevented.

Preferably, the first resistor R1 is an adjustable resistor.

Through the technical scheme, the first resistor R1 is an adjustable resistor, so that the size of the pressure reference signal can be conveniently adjusted, and the size of the pressure reference signal in the control circuit can be correspondingly adjusted according to blanks with different weights.

To sum up, the beneficial technical effects of the utility model are that:

1. the milling machine comprises a milling machine body, a workbench, a clamping assembly and a clamping assembly, wherein the workbench is connected to the milling machine body in a sliding manner, the upper surface of the workbench is rotatably connected with an object stage, the object stage is used for placing a blank, the workbench is further provided with the clamping assembly used for clamping the blank, so that the blank is fixedly connected to the object stage, and the function of moving the blank is realized through the sliding of the workbench during milling; the objective table is rotationally connected with the workbench, so that the function of milling multiple surfaces of the blank can be realized through one-time clamping, and the tolerance possibly caused by re-clamping is reduced; the two milling cutter assemblies are respectively connected to two sides of the milling machine body in the sliding direction of the workbench and are used for simultaneously milling two surfaces of a blank in cooperation with the sliding of the workbench; the upper surface of the objective table is provided with a plurality of weight sensors which are uniformly distributed along the circumferential direction of a rotating shaft of the objective table, blanks are placed on the upper surface of the weight sensors, the weight sensors are connected with buzzers, the buzzers are fixedly connected with a control circuit which is used for controlling the buzzers to sound when the pressure applied to the weight sensors is smaller than a preset threshold value, when the blanks are clamped, if the projection of the placing positions of the blanks on the objective table deviates from the central position of the objective table too much, the pressure applied to each weight sensor is inconsistent, so that the buzzers on the corresponding weight sensors are controlled to sound when the pressure applied to part of the weight sensors is detected to be smaller than the preset threshold value, and therefore personnel for prompting the clamping of the blanks can move the blanks according to the positions of the weight sensors sounded by the buzzers, the positions of the blanks are located right above the objective table, and the positioning efficiency of large-size die blanks is improved.

2. Each buzzer is electrically connected with a control circuit for controlling the buzzer to sound, wherein the weight sensor is provided with a force sensitive resistor RA for detecting the pressure of the weight sensor from a blank, the deviation detection comparison module detects the pressure of the force sensitive resistor RA from the blank and outputs a pressure detection signal, the pressure detection signal is compared with a built-in pressure reference signal, when the pressure detection signal is smaller than the pressure reference signal, the pressure detection signal is sent to the pressure switch module, the pressure switch module sends a pressure switch signal to the pressure execution module, the pressure execution module sends a pressure execution signal to communicate with a power supply loop of the buzzer, the buzzer sounds, and therefore when the condition that the blank is not placed above a certain weight sensor or the pressure applied by the blank to the certain weight sensor is smaller than a preset threshold value is detected, the buzzer is controlled to sound, a worker for clamping the blank adjusts the position of the blank according to the position of the sounding buzzer, and the blank is located right above the object stage as far as possible.

3. The milling cutter assembly comprises a shell and a milling motor fixedly connected in the shell, wherein a driving shaft of the milling motor extends out of the shell and extends out of the shell towards the direction of the other milling cutter assembly; the workstation is provided with and is used for driving objective table pivoted location electrical apparatus, and the positioning motor electricity is connected with and is used for adjusting objective table pivoted gyration positioning circuit, the casing is the first distancer of fixedly connected with and second distancer, and the range finding direction of first distancer and second distancer all is on a parallel with the drive shaft setting, be convenient for measure the distance between first distancer and second distancer and the blank respectively, and then be convenient for rotate based on the difference control positioning motor of the distance value that first distancer and second distancer measured, thereby realize adjusting the lateral wall of blank to the direction of perpendicular to drive shaft, with the precision of further improvement blank location.

Drawings

Fig. 1 is a schematic structural diagram of a fully-automatic double-head milling machine for processing large-scale molds in the application.

Fig. 2 is a front view of the fully automatic double-head milling machine for large-sized die machining in the present application.

Fig. 3 isbase:Sub>A sectional view ofbase:Sub>A section linebase:Sub>A-base:Sub>A in fig. 2.

Fig. 4 is a circuit diagram of a control circuit in the present application.

Fig. 5 is a circuit diagram of a slewing positioning circuit in the present application.

Fig. 6 is a circuit diagram of a positioning motor power supply circuit in the present application.

Description of reference numerals:

100. a blank; 1. a milling machine body; 2. a work table; 21. an object stage; 22. a weight sensor; 221. a buzzer; 23. positioning a motor; 3. a clamping assembly; 31. a support; 32. a clamping motor; 33. a clamping rod; 34. a clamping block; 4. a milling cutter assembly; 41. a housing; 42. a drive shaft; 43. a cutter; 44. a range finder; 45. a tool apron driving rod; 46. a milling cutter seat; 47. a vertical milling cutter drive; 5. a workpiece feed drive rod; 6. an offset detection comparison module; 7. a pressure switch module; 8. a pressure execution module; 9. a distance detection comparison module; 10. a first switch module; 11. a first execution module; 12. a second switch module; 13. a second execution module; 14. and positioning the switch module.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The full-automatic double-head milling machine for processing the large-sized die in the embodiment is a numerical control milling machine, has the function of controlling parameters such as the movement speed, the direction and the movement moment of a driving device on the milling machine through a computer program, and the computer program for controlling the movement speed, the direction and the movement moment of the driving device on the milling machine is the prior art.

The application discloses a full-automatic double-end milling machine for large-scale mould processing, refer to fig. 1, including milling machine body 1, workstation 2, clamping component 3, milling cutter subassembly 4 and work piece feed actuating lever 5, wherein milling machine body 1 is used for bearing and installing workstation 2, clamping component 3, components such as milling cutter subassembly 4 and work piece feed actuating lever 5, in this embodiment, the quantity of work piece feed actuating lever 5 is two, be provided with in milling machine body 1 and be used for controlling work piece feed actuating lever 5 pivoted drive arrangement (not shown in the figure), the both ends of every work piece feed actuating lever 5 all are connected in milling machine body 1, two work piece feed actuating lever 5 parallel arrangement are located same horizontal plane, wherein one end fixed connection of work piece feed actuating lever 5 is in the output shaft that is used for controlling work piece feed actuating lever 5 pivoted drive arrangement, work piece feed actuating lever 5 is the lead screw.

Referring to fig. 2 and 3, the work table 2 is rectangular plate-shaped, the work piece feeding driving rod 5 penetrates through the work table 2, and the work table 2 is connected with the work piece feeding driving rod 5 through a ball screw bearing (not shown in the figure) so that the work table 2 can slide along the length direction of the work piece feeding driving rod 5; the workbench 2 is fixedly connected with a positioning motor 23, the positioning motor 23 is a direct current rotating motor, and the function of controlling the rotating direction of an output shaft of the positioning motor 23 can be realized by changing the power supply direction of a power supply loop of the positioning motor 23; an output shaft of the positioning motor 23 extends out of one end of a casing of the positioning motor 23 to be fixedly connected with an objective table 21, one surface of the objective table 21, which is far away from the workbench 2, is fixedly connected with four weight sensors 22, the four weight sensors 22 are uniformly distributed along the circumferential direction of the axis of the output shaft of the positioning motor 23, end surfaces of the weight sensors 22, which are far away from one end of the objective table 21, are horizontally arranged and are flush with each other for bearing a blank 100 of a large-scale die, and in this embodiment, the blank 100 is in a cuboid shape; the blank 100 abuts against the end face of the end of the weight sensor 22 far away from the objective table 21, the clamping assembly 3 is used for clamping the blank 100 to realize the function of detachably and fixedly connecting the blank 100 to the objective table, and the clamping assembly 3 is fixedly connected to the upper surface of the worktable 2.

The clamping assembly 3 comprises a support 31, a clamping motor 32, a clamping rod 33 and a clamping block 34, wherein the support 31 is composed of two mutually perpendicular plates, the plate for connecting the workbench 2 is arranged perpendicular to the upper surface of the workbench 2 and is fixedly connected to one side of the workbench 2, and the other plate is arranged parallel to the upper surface of the workbench 2 and extends to the position right above the objective table 21; centre gripping motor 32 fixed connection is located the position directly over objective table 21 in support 31, centre gripping motor 32 is linear electric motor, clamping rod 33 is the output shaft of centre gripping motor 32, and clamping rod 33 perpendicular to workstation 2's upper surface sets up, grip block 34 fixed connection is in the one end that clamping rod 33 is close to objective table 21, and grip block 34 is close to the terminal surface level setting of objective table 21 one end, when centre gripping subassembly 3 is in the centre gripping state, grip block 34 butt in blank 100, preferably, the terminal surface that grip block 34 is close to objective table 21 one end is provided with soft buffer layer, in order to reduce the damage of grip block 34 to blank 100 surface.

Two milling cutter subassemblies 4 are respectively fixed connection in the both sides that milling machine body 1 is located workstation 2 slip direction, wherein, milling cutter subassembly 4 includes casing 41, blade holder actuating lever 45, milling cutter seat 46 and the vertical driving piece 47 of milling cutter, in this embodiment, the quantity of blade holder actuating lever 45 is two, be provided with in the milling machine body 1 and be used for controlling blade holder actuating lever 45 pivoted drive arrangement (not shown in the figure), the both ends of every blade holder actuating lever 45 all are connected in milling machine body 1, two blade holder actuating lever 45 parallel arrangement are located same horizontal plane, and blade holder actuating lever 45 perpendicular to work piece feed actuating lever 5 sets up, wherein one end fixed connection of blade holder actuating lever 45 is in the output shaft that is used for controlling blade holder actuating lever 45 pivoted drive arrangement, blade holder actuating lever 45 is the lead screw.

The milling cutter base 46 is rectangular plate-shaped, the cutter base driving rod 45 penetrates through the milling cutter base 46, and the milling cutter base 46 is connected with the cutter base driving rod 45 through a ball screw bearing (not shown in the figure), so that the milling cutter base 46 can slide along the length direction of the cutter base driving rod 45; the milling cutter vertical driving part 47 is fixedly connected to the milling cutter seat 46, the milling cutter vertical driving part 47 is a linear motor, an output shaft of the milling cutter vertical driving part 47 is vertically arranged, the shell 41 is fixedly connected to one end, away from the milling cutter seat 46, of the output shaft of the milling cutter vertical driving part 47, a milling motor (not shown in the figure) is fixedly connected to the inside of the shell 41, the milling motor is a rotating motor, the driving shaft 42 is an output shaft of the milling motor, the driving shaft 42 extends out of the shell 41 towards the direction of the milling cutter assembly 4 located on the other side of the sliding direction of the workbench 2, and the driving shafts 42 on the milling cutter assemblies 4 located on the two sides of the sliding direction of the workbench 2 are coaxially arranged; one end of the driving shaft 42 extending out of the housing 41 is fixedly connected with a cutter 43 for milling the blank 100; be convenient for through the length direction slip of blade holder actuating lever 45 control milling cutter seat 46 along blade holder actuating lever 45, and then reach the function that control cutter 43 is close to and keeps away from blank 100, move along vertical direction through milling cutter vertical drive 47 control casing 41, and then reach the function that control cutter 43 removed along vertical direction.

The shell 41 is further fixedly connected with a first distance meter 44 and a second distance meter 44, preferably, the first distance meter 44 and the second distance meter 44 are laser distance meters 44, the distance measurement directions of the first distance meter 44 and the second distance meter 44 are arranged in parallel to the driving shaft 42, the first distance meter 44 and the second distance meter 44 are respectively arranged on two sides of the driving shaft 42, and the axes of the first distance meter 44, the second distance meter 44 and the driving shaft 42 are located in the same horizontal plane, so that the function of judging whether the side wall of the blank 100 is perpendicular to the driving shaft 42 by comparing the distance values measured by the first distance meter 44 and the second distance meter 44 is realized, wherein the distance value measured by the first distance meter 44 is a first distance value, and the distance value measured by the second distance meter 44 is a second distance value; in practical use, the first distance meter 44 and the second distance meter 44 are mounted on the housing 41 of one milling cutter assembly 4 of the two milling cutter assemblies 4, and if the first distance meter 44 and the second distance meter 44 are mounted on both milling cutter assemblies 4, the power supply of the first distance meter 44, the second distance meter 44 and the corresponding rotary positioning circuit on one milling cutter assembly 4 can be turned off, so as to reduce the possibility that the positioning cannot be completed due to the fact that the side walls on the two sides of the blank 100 are not parallel; the positions of the first distance meter 44 and the second distance meter 44 and the rotation direction of the positioning motor 23 are set according to actual conditions, so that the output shaft of the positioning motor 23 rotates in a direction of reducing the difference between the first distance value and the second distance value.

Referring to fig. 4, the weight sensor 22 is provided with a force sensitive resistor RA and a buzzer 221 for detecting the pressure of the weight sensor 22 by the blank 100, the buzzer 221 is electrically connected with a control circuit, the control circuit comprises an offset detection comparing module 6, a pressure switch module 7 and a pressure executing module 8, and specifically, each weight sensor 22 is provided with an independent offset detection comparing module 6, a pressure switch module 7 and a pressure executing module 8.

The offset detection and comparison module 6 is used for detecting the pressure applied to the force-sensitive resistor RA and generating a pressure detection signal, the offset detection and comparison module 6 is provided with a pressure reference signal to send out a pressure comparison signal when the pressure detection signal is smaller than the pressure reference signal, the offset detection and comparison module 6 comprises the force-sensitive resistor RA and a first resistor R1, the force-sensitive resistor RA is installed on one surface of the weight sensor 22, which is contacted with the blank 100, one end of the force-sensitive resistor RA is grounded, the other end of the force-sensitive resistor RA is connected with the first resistor R1 in series and then is electrically connected with a power voltage VCC, a connection node of the force-sensitive resistor RA and the first resistor R1 is electrically connected with the pressure switch module 7, wherein the first resistor R1 is an adjustable resistor, so that the magnitude of the pressure reference signal in the control circuit can be adjusted correspondingly according to blanks 100 with different weights.

The pressure switch module 7 is electrically connected to the offset detection comparison module 6 to send out a pressure switch signal when receiving the pressure comparison signal, the pressure switch module 7 includes a PNP-type first triode Q1 and a second resistor R2, the base electrode of the first triode Q1 is electrically connected to the connection node of the force-sensitive resistor RA and the first resistor R1, the emitter electrode of the first triode Q1 is electrically connected to the power supply voltage VCC after being connected in series with the second resistor R2, and the collector electrode of the first triode Q1 is electrically connected to the pressure execution module 8 and then grounded.

Pressure execution module 8 electricity is connected in pressure switch module 7 and establishes ties in buzzer 221 'S power supply loop in order to send pressure execution signal when receiving the pressure switch signal, control buzzer 221 sounds, pressure execution module 8 includes first relay KM1, first relay KM 1' S coil one end is established ties in first triode Q1 'S collecting electrode, the other end ground connection, first relay KM1 includes normally open contact switch KM1-1, normally open contact switch KM1-1 establishes ties in buzzer 221' S power supply loop, buzzer 221 'S power supply loop still establishes ties has switch S1, whether the function that buzzer 221 auto-sounded is opened in staff' S control.

Referring to fig. 5 and 6, the positioning motor 23 is electrically connected to a rotation positioning circuit, and the rotation positioning circuit includes a distance detection comparing module 9, a positioning switch module 14, a first switch module 10, a first executing module 11, a second switch module 12, and a second executing module 13.

The distance detection and comparison module 9 is used for detecting a first distance value measured by the first distance meter 44 and a second distance value measured by the second distance meter 44, the distance detection and comparison module 9 is provided with a second reference signal Vref2 used for comparing with the first distance value and a first reference signal Vref1 used for comparing with the second distance value, so as to send out a first comparison signal when the first distance value is greater than the second reference signal Vref2 and send out a second comparison signal when the second distance value is greater than the first reference signal Vref1, wherein the value of the first reference signal Vref1 is the sum of the first distance value and an error allowance value, the value of the second reference signal Vref2 is the sum of the second distance value and the error allowance value, the distance detection and comparison module 9 comprises the first distance meter 44, the second distance meter 44, a Vref1 signal generator, a Vref2 signal generator, a first comparator N1 and a second comparator N2, the first distance meter 44 is configured to detect a first distance value, the second distance meter 44 is configured to detect a second distance value, a signal output end of the first distance meter 44 is electrically connected to a forward input end of the first comparator N1 and a signal input end of the Vref1 signal generator, a signal output end of the second distance meter 44 is electrically connected to a forward input end of the second comparator N2 and a signal input end of the Vref2 signal generator, a signal output end of the Vref1 signal generator is electrically connected to a reverse input end of the first comparator N1, a signal output end of the Vref2 signal generator is electrically connected to a reverse input end of the second comparator N2, a signal output end of the first comparator N1 is electrically connected to the first switch module 10 after being connected in series to the third resistor R3, and a signal output end of the second comparator N2 is electrically connected to the second switch module 12 after being connected in series to the fifth resistor R5.

The positioning switch module 14 is electrically connected to the distance detection and comparison module 9 and configured to control whether a function of the rotary positioning circuit is turned on, the positioning switch module 14 includes a switch S2-1 and a switch S2-2, one end of the switch S2-1 is electrically connected to a signal output end of the first comparator N1, the other end of the switch S2-1 is electrically connected to the first switch module 10 after being electrically connected to the third resistor R3 in series, one end of the switch S2-2 is electrically connected to a signal output end of the second comparator N2, the other end of the switch S2-2 is electrically connected to the second switch module 12 after being electrically connected to the fifth resistor R5 in series, the switch S2-1 and the switch S2-2 are linked switches, and specifically, the switch S2-1 and the switch S2-2 may be manually controlled, or may be closed when it is detected that the clamping assembly 3 is clamped, and may be opened when it is detected that the milling motor is turned on.

The first switch module 10 is electrically connected to the positioning switch module 14 to send a first switch signal when receiving the first comparison signal, the first switch module 10 includes a second transistor Q2 and a fourth resistor R4, a base of the second transistor Q2 is electrically connected to the switch S2-1 through the third resistor R3, a collector of the second transistor Q2 is electrically connected to the power supply voltage VCC after being connected in series with the fourth resistor R4, and an emitter of the second transistor Q2 is electrically connected to the first execution module 11 and then grounded.

First execution module 11 electricity is connected in first switch module 10 and series connection in positioning motor 23's forward power supply loop, in order to send first execution signal when receiving first switching signal, the forward power supply loop of intercommunication positioning motor 23, first execution module 11 includes second relay KM2, second relay KM 2's coil one end is connected with second triode Q2's projecting pole electricity, the other end ground connection, second relay KM2 includes normally open contact switch KM2-1 and normally open contact switch KM2-2, the positive pole of DC power supply is established ties to normally open contact switch KM 2-1's one end, the other end is established ties in positioning motor 23's positive pole, the negative pole of positioning motor 23 is established ties to normally open contact switch KM 2-2's one end, the other end is established ties in DC power supply's negative pole.

The second switch module 12 is electrically connected to the positioning switch module 14 to send a second switch signal when receiving the second comparison signal, the second switch module 12 includes a third transistor Q3 and a sixth resistor R6, a base of the third transistor Q3 is electrically connected to the switch S2-2 through a fifth resistor R5, a collector of the third transistor Q3 is electrically connected to the power supply voltage VCC after being connected in series with a sixth resistor R4, and an emitter of the third transistor Q3 is electrically connected to the second execution module 13 and then grounded.

The second execution module 13 is electrically connected to the second switch module 12 and is connected in series to the reverse power supply loop of the positioning motor 23, so as to send out a second execution signal when receiving the second switch signal, the reverse power supply loop of the positioning motor 23 is connected in series, the second execution module 13 includes a third relay KM3, one end of a coil of the third relay KM3 is electrically connected to an emitter of the third triode Q3, the other end is grounded, the third relay KM3 includes a normally open contact switch KM3-1 and a normally open contact switch KM3-2, one end of the normally open contact switch KM3-1 is connected in series to a negative electrode of the direct current power supply, the other end is connected in series to a positive electrode of the positioning motor 23, one end of the normally open contact switch KM3-2 is connected in series to a negative electrode of the positioning motor 23, and the other end is connected in series to a negative electrode of the direct current power supply.

The implementation principle of the embodiment is as follows: when the full-automatic double-head milling machine for processing large dies is used for processing large dies, the blank 100 needs to be placed above the weight sensor 22 arranged on the object stage 21, the weight sensor 22 is provided with the force-sensitive resistor RA and the buzzer 221, wherein the buzzer 221 is electrically connected with a control circuit, and when the projection of the position, on the object stage 21, of the blank 100 placed on the weight sensor 22 is not in the center of the object stage 21, the pressure applied to the force-sensitive resistor RA on each weight sensor 22 is different.

The offset detection comparison module 6 detects the pressure of the force-sensitive resistor RA from the blank 100 and outputs a pressure detection signal, and compares the pressure detection signal with a built-in pressure reference signal, and when the pressure detection signal is smaller than the pressure reference signal, the pressure comparison signal is sent to the pressure switch module 7, the pressure switch module 7 sends a pressure switch signal to the pressure execution module 8, and then the pressure execution module 8 sends the pressure execution signal to communicate with a power supply loop of the buzzer 221, so that the buzzer 221 is sounded, thereby realizing that when the blank 100 is detected not to be placed above a certain weight sensor 22 or the pressure applied to the certain weight sensor 22 by the blank 100 is smaller than a preset threshold value, the buzzer 221 is controlled to sound, facilitating a worker who clamps the blank 100 to adjust the position of the blank 100 according to the position of the sounded buzzer 221 corresponding to the weight sensor 22, and enabling the blank 100 to be located right above the object stage 21 as much as possible.

The positioning motor 23 is electrically connected with a rotary positioning circuit for adjusting the rotation of the object stage 21, wherein the distance detection and comparison module 9 detects a first distance value measured by the first distance meter 44 and a second distance value measured by the second distance meter 44, compares the first distance value with a second reference signal Vref2, and compares the second distance value with a first reference signal Vref1, wherein the value of the first reference signal Vref1 is the sum of the first distance value and an error allowable value, and the value of the second reference signal Vref2 is the sum of the second distance value and the error allowable value, when the first distance value is greater than the second reference signal Vref2, the first comparison signal is sent to the first switch module 10, so that the first switch module 10 sends a first switch signal to the first execution module 11, and further the first execution module 11 sends the first execution signal to communicate with a forward power supply circuit of the positioning motor 23, so that the positioning motor 23 rotates forward; when the second distance value is greater than the first reference signal Vref1, a second comparison signal is sent to the second switch module 12, so that the second switch module 12 sends a second switch signal to the second execution module 13, and the second execution module 13 sends a second execution signal to communicate with a reverse power supply loop of the positioning motor 23, so that the positioning motor 23 rotates in a reverse direction; therefore, when the difference value between the first distance value and the second distance value is detected to be larger than the error allowance value, the positioning motor 23 is automatically started to rotate so as to adjust the side wall of the blank 100 to be perpendicular to the direction of the driving shaft 42, and the automation level of positioning the blank 100 is improved.

The above is the preferred embodiment of the present application, and the protection scope of the present application is not limited thereby, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a full-automatic double-end milling machine for large-scale mould processing which characterized in that: including milling machine body (1), workstation (2), centre gripping subassembly (3) and two milling cutter unit (4), workstation (2) sliding connection is in milling machine body (1), workstation (2) upper surface rotates and is connected with objective table (21), centre gripping subassembly (3) fixed connection is in workstation (2) for centre gripping blank (100), two milling cutter unit (4) are connected respectively in milling machine body (1) and are located the both sides of workstation (2) slip direction, the last fixed surface of objective table (21) is connected with a plurality of weighing transducer (22), and is a plurality of revolving axle circumference evenly distributed along objective table (21) weighing transducer (22), and place in the upper surface of weighing transducer (22) blank (100), weighing transducer (22) are connected with bee calling organ (221), bee calling organ (221) electricity is connected with the control circuit who is used for controlling bee calling organ (221) to sound when detecting that weighing transducer (22) receives pressure and is less than predetermineeing the threshold value.

2. The full-automatic double-head milling machine for machining large-scale dies according to claim 1, characterized in that: the weight sensor (22) is provided with a force sensitive resistor RA for detecting the pressure of the weight sensor (22) against the blank (100), the control circuit comprising:

the offset detection and comparison module (6) is used for detecting the pressure applied to the force-sensitive resistor RA and generating a pressure detection signal, and the offset detection and comparison module (6) is provided with a pressure reference signal so as to send out a pressure comparison signal when the pressure detection signal is smaller than the pressure reference signal;

the pressure switch module (7) is electrically connected with the deviation detection comparison module (6) to send out a pressure switch signal when receiving the pressure comparison signal;

and the pressure execution module (8) is electrically connected to the pressure switch module (7) and is connected in series in a power supply loop of the buzzer (221) so as to send out a pressure execution signal when receiving the pressure switch signal and control the buzzer (221) to sound.

3. The full-automatic double-head milling machine for machining large-scale dies according to claim 1, characterized in that: milling cutter subassembly (4) are including casing (41), casing (41) internal fixation is connected in there is the motor of milling, drive shaft (42) of milling the motor extend casing (41) towards the direction of another milling cutter subassembly (4), one end fixedly connected with cutter (43) that casing (41) extend in drive shaft (42), casing (41) are first distancer (44) of fixedly connected with and second distancer (44) still, the range finding direction of first distancer (44) and second distancer (44) all is on a parallel with drive shaft (42) setting, workstation (2) are provided with and are used for driving objective table (21) pivoted positioning motor (23), positioning motor (23) electricity is connected with and is used for surveying difference adjustment objective table (21) pivoted gyration objective table location circuit of distance value according to first distancer (44) and second distancer (44).

4. The full-automatic double-head milling machine for machining large-scale dies according to claim 3, characterized in that: the slewing positioning circuit comprises:

the distance detection and comparison module (9) is used for detecting a first distance value measured by the first distance meter (44) and a second distance value measured by the second distance meter (44), the distance detection and comparison module (9) is provided with a second reference signal Vref2 used for comparing with the first distance value and a first reference signal Vref1 used for comparing with the second distance value, so as to send out a first comparison signal when the first distance value is greater than the second reference signal Vref2 and send out a second comparison signal when the second distance value is greater than the first reference signal Vref1, wherein the value of the first reference signal Vref1 is the sum of the first distance value and an error allowable value, and the value of the second reference signal Vref2 is the sum of the second distance value and the error allowable value;

the first switch module (10) is electrically connected to the distance detection comparison module (9) to send out a first switch signal when receiving the first comparison signal;

the first execution module (11) is electrically connected to the first switch module (10) and is connected in series in the forward power supply loop of the positioning motor (23) so as to send out a first execution signal when receiving the first switch signal and communicate the forward power supply loop of the positioning motor (23);

the second switch module (12) is electrically connected with the distance detection comparison module (9) to send out a second switch signal when receiving the second comparison signal;

and the second execution module (13) is electrically connected to the second switch module (12) and is connected in series in the reverse power supply loop of the positioning motor (23) so as to send out a second execution signal when receiving the second switch signal and communicate with the reverse power supply loop of the positioning motor (23).

5. The full-automatic double-head milling machine for machining large-scale dies according to claim 2, characterized in that: the deviation detection comparison module (6) comprises a force-sensitive resistor RA and a first resistor R1, wherein the force-sensitive resistor RA is used for detecting the pressure borne by the weight sensor (22), the force-sensitive resistor RA is installed on one surface, contacted with the blank (100), of the weight sensor (22), one end of the force-sensitive resistor RA is grounded, the other end of the force-sensitive resistor RA is connected with the power supply voltage VCC in series with the first resistor R1, and the connection node of the force-sensitive resistor RA and the first resistor R1 is connected to the pressure switch module (7).

6. The full-automatic double-head milling machine for machining large-scale dies according to claim 4, characterized in that: the distance detection comparison module (9) comprises a first distance meter (44), a second distance meter (44), a Vref1 signal generator, a Vref2 signal generator, a first comparator N1 and a second comparator N2, wherein the first distance meter (44) is used for detecting a first distance value, the second distance meter (44) is used for detecting a second distance value, a signal output end of the first distance meter (44) is electrically connected to a forward input end of the first comparator N1 and a signal input end of the Vref1 signal generator, a signal output end of the second distance meter (44) is electrically connected to a forward input end of the second comparator N2 and a signal input end of the Vref2 signal generator, a signal output end of the Vref1 signal generator is electrically connected to a reverse input end of the first comparator N1, a signal output end of the Vref2 signal generator is electrically connected to the first switch module (10) after being connected to a third resistor R3 in series, and a signal output end of the second comparator N2 is electrically connected to the second switch module (12) after being connected to a fifth resistor R5 in series.

7. The full-automatic double-head milling machine for machining large-scale dies according to claim 4, characterized in that: the rotary positioning circuit further comprises a positioning switch module (14), the positioning switch module (14) comprises a switch S2-1 and a switch S2-2, and the switch S2-1 and the switch S2-2 are linked switches.

8. The full-automatic double-head milling machine for machining large-scale dies according to claim 5, characterized in that: the first resistor R1 is an adjustable resistor.