KR20230023175A - Multiaxial machining center with independent pitch adjustment structure - Google Patents

Abstract

The present invention relates to a multi-axis machining type machining center having an independent pitch adjustment structure. More particularly, the present invention relates to a multi-axis machining type machining center having an independent pitch control structure in which a multi-axis machining unit equipped with a plurality of machining axis units is seated on a movable table and simultaneously cuts each part to be machined of a plurality of workpieces horizontally cut in the longitudinal direction.

Description

Multiaxial machining center with independent pitch adjustment structure}

The present invention relates to a multi-axis processing type machining center having an independent pitch adjustment structure, and more particularly, to a multi-axis processing unit equipped with a plurality of processing axis units, which is seated on a movable table to horizontally cut each of a plurality of workpieces in the longitudinal direction. It relates to a multi-axis machining type machining center having an independent pitch control structure that simultaneously cuts and processes a machined part.

As is well known, a machining center is a numerically controlled machine tool equipped with an automatic tool changer or automatic selection function and capable of performing various types of machining on two or more surfaces of a workpiece without preparation or replacement of the workpiece. In other words, it is a typical CNC machine tool that can continuously perform milling, drilling, and boring operations while automatically exchanging cutting tools.

Here, the machining center is similar to general-purpose milling. A column, knees corresponding to the X, Y, and Z axes, and a servo control mechanism by a servo motor are attached on the bed, so that up and down, forward and backward, and left and right movements are NC It is composed of a table made by commands, and consists of a spindle on which cutting tools are mounted, and a controller that inputs and outputs NC commands to control the operation of the table and the main axis.

In addition, by attaching an automatic tool changer (ATC) that automatically changes 20 to 70 tools according to cutting conditions, various milling, drilling, and boring operations can be performed at once by automatic tool change. By doing so, multi-axis machining and multi-process machining are possible with only one setting, which is advantageous for automating the machining process of small-volume parts of various kinds.

In order to process a workpiece using such a machining center, a worker fixes the workpiece to a jig means such as a vise fixedly installed on a table, sets the position of the fixed workpiece accurately to the zero point, and then operates the machining center. When operated, based on the position where the workpiece is fixed, the machining center controls the feed of the table where the workpiece is fixed in the X and Y-axis directions according to the pre-entered machining value, and moves the main axis equipped with the cutting tool rotating at high speed to the Z axis. By controlling the feed in the axial direction, the workpiece is automatically processed.

Thus, when the processing of the workpiece is completed, the worker discharges the workpiece fixed to the jig means for processing from the jig means, fixes a new workpiece to the jig means again, and repeats the above work process to repeat the same product. processing is performed.

However, the machining center controls the feed of the table to which the workpiece is fixed or the feed of the main shaft on which the cutting tool is mounted according to the pre-input processing value based on the position of the workpiece fixed on the table. Since the workpiece is processed, the fixed position of the workpiece is very important in the precision machining of the workpiece.

In addition, since the time required for attaching and detaching the workpiece to the table of the machining center has a great influence on the productivity of the product, in fixing the workpiece to the table of the machining center, the jig means for fixing the workpiece is relative to the main axis. It is installed on the exact reference point in the X and Y axis directions, and the jig means must quickly fix the workpiece at a certain position even when finally fixing the workpiece.

However, even if the unskilled person fixes the workpiece to the jig means, it takes a lot of time to fix the workpiece to the correct position, which not only causes a decrease in product productivity, but also fixes the workpiece to the jig means, and then processes it, In the process of repeating the work of fixing a new workpiece to the jig means after discharging the finished workpiece, it is difficult to find the correct position of the jig means due to a decrease in concentration due to operator fatigue or a lack of function due to unskilled workers. When the work piece is not fixed, there is also a problem in that the processing precision of the work piece is remarkably lowered and the occurrence rate of defective products is increased.

Registered Patent Publication No. 10-0906726 (2009. 07. 07) Registered Patent Publication No. 10-1159425 (2012. 07. 03)

An object of the present invention, which was made to solve the above problems, is that a multi-axis machining unit equipped with a plurality of machining axis units is seated on a movable table and simultaneously cutting each machining part of a plurality of workpieces horizontally cut in the longitudinal direction. multi-axis with an independent pitch control structure that corrects the fixing error of the workpiece placed on the movable table through independent pitch adjustment of each machining axis unit, and solves all problems caused by aligning the machining origin by re-fixing the workpiece It is to provide a machining type machining center.

The above object is achieved by the following structure provided by the present invention.

The multi-axis machining center having an independent pitch adjustment structure according to the present invention,

bed and; a processing table unit disposed above the bed and fixing one or more workpieces in an alignment space through jig units to horizontally insert the workpieces collectively in the longitudinal direction;

a multi-axis processing unit having two or more processing axis units for processing by inserting a cutting tool into a processing portion of a workpiece horizontally cut in the longitudinal direction by the processing table unit; In the multi-axis machining center configured to include a tool changer for replacing and mounting a cutting tool required for each machining axis unit of the multi-axis machining unit,

The multi-axis processing unit includes a fixed base; two or more processing axis units arranged in a left and right forward and backward structure on the fixed base; Each processing axis unit installed in the left and right advance and retreat structure on the fixed base is independently pulled and transferred left and right, and each processing axis unit is transferred left and right independently to determine the machining origin of the processing axis unit for the workpiece to be cut on the corresponding processing axis unit. It is characterized in that it is configured to include an independent pitch control unit to align.

Preferably, the independent pitch control unit includes a pitch control motor for generating normal and reverse rotational force by a control signal; A lead transfer shaft connecting the rotation shaft of the pitch control motor and the movable shaft unit with a lead transfer structure to convert the rotational force of the pitch control motor into transfer force to promote left and right transfer of the movable shaft unit,

Each machining axis unit and the independent pitch control unit are formed by matching 1:1, and are configured to promote independent left and right movement of the machining axis unit constituting the multi-axis machining unit.

More preferably, the machining axis unit includes a spindle member in which a fixed chuck for mounting a cutting tool is disposed below the spindle; and an elevation cutting member for cutting a cutting tool mounted on a fixed chuck into a processing portion of a workpiece to be horizontally cut in a longitudinal direction by moving the spindle member up and down.

And, the lifting cutting member includes a lifting motor for generating forward and reverse rotational force by a control signal; A lead feed shaft connecting the rotating shaft of the lift motor and the rotating spindle assembly in a lead feed structure is included, so that the spindle member is moved up and down by forward and reverse rotation of the lift motor.

In addition, it is disposed under the fixed base on which the processing shaft units are arranged and interferes with the cutting edge of the lower end of the cutting tool mounted on the processing shaft unit descending through the pressure sensor to measure the cutting height of the cutting edge. contains a value metric;

The movable shaft units are configured to cut a workpiece to be cut horizontally in the longitudinal direction by moving up and down based on the cutting height value of the cutting tool measured through the cutting height value measurement tool.

As described above, the multi-axis machining type machining center according to the present invention has a unique machining origin alignment structure that aligns the machining origin through left and right independent movement of each machining axis unit constituting the multi-axis machining unit.

Therefore, without correcting the position of the workpiece fixed to the movable table through the jig unit through independent pitch adjustment of each machining axis unit, simple alignment of the machining origin of the machining axis unit with respect to the workpiece fixed to the machining table this is possible

That is, the present invention corrects the fixing error of the workpiece seated on the movable table through independent pitch adjustment of the machining axis units constituting the multi-axis machining unit, and as a result, the distance between the workpiece and the machining axis unit without re-fixing the workpiece. It is possible to precisely machine a plurality of workpieces through a plurality of machining axis units through simple alignment of the machining origin.

1 and 2 show the overall configuration of a multi-axis machining type machining center having an independent pitch control structure proposed as a preferred embodiment of the present invention and the multi-axis cutting state of a workpiece,
3 to 5 show the detailed configuration of the multi-axis processing unit and the independent pitch control state of the machining axis units constituting the multi-axis processing unit in the multi-axis machining center having an independent pitch control structure proposed in the present invention as a preferred embodiment. is to show,
6 is a multi-axis processing type machining center having an independent pitch control structure proposed as a preferred embodiment in the present invention, showing a collective stopping state of processing axis units constituting a multi-axis processing unit,
7 shows the measurement state of the cutting tool height value and eccentricity through the cutting height measuring tool in the multi-axis machining center having an independent pitch control structure proposed as a preferred embodiment of the present invention.

Hereinafter, a multi-axis machining center having an independent pitch control structure proposed as a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show the overall configuration of a multi-axis machining type machining center having an independent pitch control structure proposed as a preferred embodiment of the present invention and the multi-axis cutting state of a workpiece, and FIGS. 3 to 5 show the present invention. In a multi-axis processing type machining center having an independent pitch control structure proposed in a preferred embodiment, the detailed configuration of the multi-axis processing unit and the independent pitch control state of the processing axis units constituting the multi-axis processing unit are shown, and FIG. 6 is the present invention. In a multi-axis machining type machining center with an independent pitch control structure proposed as a preferred embodiment in , it shows the collective stopping state of the machining axis units constituting the multi-axis processing unit, and FIG. 7 is proposed as a preferred embodiment in the present invention. In a multi-axis machining center with an independent pitch control structure, it shows the measurement state of the height of cut and eccentricity of the cutting tool through the measuring tool for the height of cut.

The multi-axis machining center 1 having an independent pitch adjustment structure according to the present invention simultaneously cuts each machining part of the workpiece 100 horizontally cut in the longitudinal direction through a plurality of machining axis units 52. It is a device.

The multi-axis machining type machining center 1 having the independent pitch adjustment structure includes a bed 10 as shown in FIGS. 1 and 2; A processing table disposed above the bed 10 and fixing one or more workpieces 100 in the alignment space 21a through jig units 22 to horizontally cut the workpieces 100 collectively in the longitudinal direction. with section 20; A multi-axis processing unit (50) having two or more processing shaft units (52) for processing by inserting a cutting tool (200) into a processing portion of the workpiece (100) horizontally cut in the longitudinal direction by the processing table unit (20) and; a tool changer unit 30 for replacing and mounting a required cutting tool 200 to each processing axis unit 52 of the multi-axis processing unit 50; and a chip recovery unit 40 that recovers chips cut from the workpiece 100 .

The movable table unit 20 includes a movable table 21 arranged in a forward and backward structure on the upper part of the bed 10; a jig unit 22 for fixing the workpiece 100 seated in the alignment space 21a of the movable table 21; And a movable cutting unit 23 for horizontally cutting the workpieces 100 into the multi-axis processing unit 50 in the longitudinal direction by horizontally transferring the movable table 21 on which the workpiece 100 is seated in the longitudinal direction. do.

In this embodiment, by forming an alignment space 21a in which jig units 22 are provided on both left and right sides of the movable table 21, a pair of workpieces 100 are simultaneously seated in the multi-axis processing unit 50 to make an incision

Also, the tool changer unit 30 transfers the cutting tool 200 requiring replacement mounting among the cutting tools 200 mounted in the tool port 32 moving annularly by the conveying chain 31 to the machining shaft unit 52. ) to be replaced.

The tool changer unit 30 is arranged in a 1: 1 form to correspond to the number of processing axis units 52 constituting the multi-axis processing unit 50, and is installed in the tool port 32 of each processing axis unit 52 The cutting tool 200 is rapidly replaced and mounted.

In addition, the chip recovery unit 40 is disposed on both sides of the movable table 21, and is seated on the movable table 21 to recover chips generated in the cutting process by the multi-axis processing unit 50 ( 41), a discharge screw 42 arranged in a rotational structure in the recovery path 41 to transfer and discharge chips collected in the recovery path 41, and a discharge screw 42 for collecting chips discharged by the discharge screw 42 It includes a collection box (43).

In addition, as shown in FIGS. 1 to 5, the multi-axis machining unit 50 is configured in a form in which two or more machining axis units 52 vertically rotated by mounting cutting tools 200 are spaced apart from each other, , Simultaneously cutting processing parts of a plurality of workpieces 100 horizontally cut in the longitudinal direction by the movable table unit 20.

In this embodiment, four movable shaft units 52 are disposed so that the processing parts of the pair of workpieces 100 that are simultaneously horizontally cut in the longitudinal direction by the movable table 21 are simultaneously cut.

Here, each movable axis unit 52 constituting the multi-axis processing unit 50 is a spindle member in which a fixed chuck 52a-b for mounting the cutting tool 200 is disposed below the spindle 52a-a ( 52a) and; An elevating cutting member 52b which cuts the cutting tool 200 mounted on the fixed chuck 52a-b into the processing part of the workpiece 100 horizontally cut in the longitudinal direction by moving the spindle member 52a up and down. ).

Here, the lifting cutting member 52b includes a lifting motor 52b-a generating forward and reverse rotational force by a control signal; A spindle member by normal and reverse rotation of the lift motor 52b-a, including a lead transfer shaft 52b-b connecting the rotation shaft of the lift motor 52b-a and the rotational spindle assembly 52a in a lead transfer structure. The vertical elevation of 52a is aimed at.

On the other hand, in the present invention, in simultaneously cutting the machining part of two or more workpieces 100 horizontally cut in the longitudinal direction through the multi-axis machining part 50 in which a plurality of machining axis units 52 are arranged in plurality, each of the above Independent pitch adjustment of the machining axis units 52 is possible.

In this configuration, the workpieces 100 and the workpieces 100 and the workpieces 100 are moved without the operator changing the positions of the workpieces 100 with high loads fixed to the movable table 21 through the jig unit 22 and correcting fixing errors. It is possible to easily align the machining origin of each machining axis unit 52 constituting the polygonal machining unit 50 .

Accordingly, the multi-axis processing unit 50 includes a fixed base 51 having one or more guide rails 51a formed thereon; two or more processing axis units 52 independently installed on the guide rails 51a formed on the fixed base 51 and transported independently of each other; It is individually installed on each of the machining axis units 52 installed in the left and right forward and backward structures on the fixed base 51, and transfers each machining axis unit 52 left and right independently, between the corresponding machining axis unit 52 and the workpiece 100. It includes an independent pitch control unit 53 for aligning the processing origin of .

In this embodiment, four processing axis units 52 are arranged in a left and right forward and backward structure on the fixed base 51, and an independent pitch control unit 53 is arranged on each processing axis unit 52, so that the multi-axis processing unit ( 50), each of the machining axis units 52 moves independently to the left and right according to the alignment state of the workpiece 100 fixed in the alignment space 21a of the movable table 21 so that the machining origin is aligned.

The independent pitch control unit 53 includes a pitch control motor 53a generating normal and reverse rotational force by a control signal; A lead transfer shaft 53b connecting the rotation shaft of the pitch control motor 53a and the movable shaft unit 52 in a lead transfer structure is included.

Therefore, as shown in FIG. 5, the independent pitch control unit 53 formed by matching each machining axis unit 52 1:1 is matched according to the alignment state of the workpiece 100 seated on the machining table 52. By moving the machining axis unit 52 left and right, the machining origin of the corresponding machining axis unit 52 with respect to the workpiece 100 is aligned.

Thus, the multi-axis machining center 1 according to the present embodiment has a unique machining origin alignment structure in which each machining axis unit 52 moves left and right independently to align the machining origin, and is operated through the jig units 22. Even without correcting the position of the workpiece 100 fixed in the alignment space 21a of the table 21, the corresponding machining axis unit for the workpiece 100 through independent pitch adjustment of each machining axis unit 52 (52) has the uniqueness of being able to easily align the processing center.

In particular, in the fixed base 51 constituting the multi-axis processing unit 50, the processing axis units 52, the pitch of which is controlled by the independent pitch control unit, are collectively fixed to each point of the fixed base 51. A stopper unit 54 is provided so that a standardized fixed state of each machining axis unit 52 is formed by the stopper unit 54 .

The stopper unit 54 proposed in this embodiment is disposed in a rotational structure in the left and right longitudinal directions on the fixed base 51 and protrudes the eccentric (54a-a) on the mounting surface by one-way rotation, as shown in FIG. and a stopping shaft 54a for collectively restraining the machining shaft units 52 disposed on the mounting surface as shown in FIG. 6; The stopping shaft 54a is rotated in one direction at an equal angle so that the eccentric side 54a-a protrudes from the mounting surface to restrain the processing shaft units 52 formed on the mounting surface of the fixed base 51 to the fixed base 51 and a restraint motor 54b for fixing.

In addition, the multi-axis processing unit 50 according to the present embodiment is operated by mounting the cutting tool 200 supplied by replacement through the tool changer unit 30 to the fixed chucks 52a-b of each processing axis unit 52 It is configured to cut the workpiece 100 horizontally cut in the longitudinal direction by the table 21.

However, since the cutting tool 200, due to its characteristics, wear of the cutting edge due to repetitive cutting, inevitably causes a deviation in the height value of the cutting tool 200 mounted on the machining shaft unit 52, and such cutting A machining error of the workpiece 100 may be caused by a height value deviation of the tool 200 .

In order to solve this problem, in the present invention, a cutting height value measurement sphere 60 for accurately measuring the height value of the cutting tool 200 mounted on the machining axis unit 52 is further added, and the tool changer unit 30 The machining axis unit 52 equipped with the cutting tool 200 is the cutting height value of the cutting tool 200 mounted on the fixed chuck 52a-b of the spindle member 52a through the cutting height measurement sphere 60. By simply measuring , the corresponding machining axis unit 52 ascends and descends based on the measured cutting height value to precisely insert the cutting tool 200 into the machining part of the workpiece 100 horizontally cut in the longitudinal direction. .

As shown in FIGS. 3, 5, and 7, the cutting height measurement sphere 60 according to the present embodiment is disposed in a forward and backward structure at the lower portion of the fixed base 51 on which the processing shaft units 52 are disposed. It interferes with the cutting edge end 210 of the lower end of the cutting tool 200 mounted on the machining axis unit 52 that includes the tray 64 and descends through the pressure sensor 61 mounted on the tray 64. The cutting height of the cutting edge 210 is measured.

Preferably, the cut-in height measuring sphere 60 is configured to advance and retreat to the lower part of the fixed base 51 by the advancing and retreating member 63, and maintains a concealed state in the lower part of the fixed base 51 at normal times When measuring the height of cut of the cutting tool 200, the height of cut of the cutting tool 200 that temporarily advances and descends is measured.

In addition, the eccentricity of the rotating cutting tool 200 is measured in the tray 64 constituting the cutting height value measuring sphere 60, and the eccentricity of the cutting tool 200 mounted on the machining axis unit 52 An eccentric measurement sensor 62 for measuring Notify the manager via

The eccentricity measurement sensor 62 is configured to measure the eccentricity of the cutting tool 200 in which a plurality of sensor members are arranged in a radial structure to rotate.

In addition, the sensor members measure the eccentricity of the cutting tool 200 in a non-contact state with the cutting tool 200, or contact the outer diameter surface of the cutting tool 200 to measure the eccentricity of the cutting tool 200. A contact method may be adopted.

Therefore, when a new cutting tool 200 is replaced and mounted on the corresponding machining axis unit 52 by the tool changer 30, the infeed height measuring sphere 60 advances to the lower part of the machining axis unit 52. located temporarily.

In this state, the machining shaft unit 52 descends and brings the cutting edge 210 of the mounted cutting tool 200 into contact with the pressure sensor 61 disposed below, thereby reducing the cutting edge 210 of the cutting tool 200. The height is measured to measure the cutting height value, and then the spindle member 52a of the machining axis unit 52 rotates to rotate the cutting tool 200 in one direction, and in this state, the eccentric measurement sensor 62 is The eccentricity of the shank portion of (200) is measured.

In addition, when the measurement of the cutting height value and the eccentricity value is completed, the machining axis unit 52 rises and returns, and then the machining axis unit 52 moves up and down according to the measured cutting height value to avoid horizontal cutting in the longitudinal direction. The processing part of the workpiece 100 is cut.

1. Multi-axis machining center
10. Bed
20. movable table part 21. movable table
21a. Alignment space 22. Jig unit
23. Movable infeed unit
30. Tool changer 31. Transfer chain
32. Tool port
40. Chip recovery unit 41. Recovery path
42. Discharge screw 43. Collecting box
50. Multi-axis machining part 51. Fixed base
51a. Guide rail 52. Machining axis unit
52a. Spindle member 52a-a. spindle
52a-b. fixed chuck 52b. Elevating cutting member
52b-a. Elevating motor 52b-b. lead feed axis
53. Independent pitch control unit 53a. pitch control motor
53 b. Lead feed shaft 54. Stopper unit
54a. Stopping shaft 54a-a. eccentric valve
54 b. restraint motor
60. Cutting height measurement tool 61. Pressure sensor
62. Eccentricity measurement sensor 63. Advance and retreat member
100. Workpiece 200. Cutting tool

Claims (5)

bed and; a processing table unit disposed above the bed and fixing one or more workpieces in an alignment space through jig units to horizontally insert the workpieces collectively in the longitudinal direction;
a multi-axis processing unit having two or more processing axis units for processing by inserting a cutting tool into a processing portion of a workpiece horizontally cut in the longitudinal direction by the processing table unit; In the multi-axis machining center configured to include a tool changer for replacing and mounting a cutting tool required for each machining axis unit of the multi-axis machining unit,
The multi-axis processing unit includes a fixed base; two or more processing axis units arranged in a left and right forward and backward structure on the fixed base; Each processing axis unit installed in the left and right advance and retreat structure on the fixed base is independently pulled and transferred left and right, and each processing axis unit is transferred left and right independently to determine the machining origin of the processing axis unit for the workpiece to be cut on the corresponding processing axis unit. Multi-axis machining type machining center having an independent pitch control structure, characterized in that configured to include an independent pitch control unit for aligning. According to claim 1, wherein the independent pitch control unit comprises: a pitch control motor for generating forward and reverse rotational force by a control signal; A lead transfer shaft connecting the rotation shaft of the pitch control motor and the movable shaft unit with a lead transfer structure to convert the rotational force of the pitch control motor into transfer force to promote left and right transfer of the movable shaft unit,
Each machining axis unit and the independent pitch control unit are formed by matching 1: 1, and the multi-axis machining type machining center having an independent pitch control structure, characterized in that configured to promote independent left and right movement of the machining axis unit constituting the multi-axis machining unit. . According to claim 1, wherein the machining axis unit and a spindle member in which a fixed chuck for mounting a cutting tool is disposed in the lower portion of the spindle;
A multi-axis machining type having an independent pitch adjustment structure, characterized in that it comprises a lifting cutting member for cutting a cutting tool mounted on a fixed chuck into a processing part of a workpiece that is horizontally cut in the longitudinal direction by lifting the spindle member up and down. machining center. According to claim 1, wherein the lifting cutting member comprises a lifting motor for generating forward and reverse rotational force by a control signal;
A multi-axis processing type having an independent pitch adjustment structure, characterized in that the vertical elevation of the spindle member is promoted by forward and reverse rotation of the elevation motor, including a lead transfer shaft connecting the rotation axis of the elevation motor and the rotating spindle assembly with a lead transport structure. machining center. The cutting tool according to claim 1, which is disposed below the fixed base on which the machining axis units are arranged and is mounted on the machining axis unit descending through a pressure sensor, interferes with the cutting edge of the lower end of the cutting tool to determine the cutting height of the cutting edge. Including a measuring sphere for the height of the cut to measure,
Multi-axis machining having an independent pitch adjustment structure, characterized in that the movable shaft units are configured to cut workpieces that are horizontally cut in the longitudinal direction by moving up and down based on the cutting height value of the cutting tool measured through the cutting height value measurement tool. mold machining center.

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