KR20210000122A - Jig for multi-axis machine apparatus with imporved pitch correction structure - Google Patents

Abstract

The present invention relates to a jig device for a multi-axis machine tool having an improved pitch correction structure. More specifically, the jig device is disposed in a machine tool having a pair of processing shafts to align a pair of workpieces at corresponding centers of each processing shaft.

Description

Jig for multi-axis machine apparatus with imporved pitch correction structure

The present invention relates to a jig device for a multi-axis machine tool having an improved pitch correction structure, and more particularly, it is disposed on a machine tool provided with a pair of machining axes, and places a pair of workpieces at the center of each corresponding machining axis. It relates to a jig device for a multi-axis machine tool having an improved pitch correction structure to be aligned.

As is well known, a machining center is a numerically controlled machine tool that is equipped with an automatic tool change device or an automatic selection function and can perform various types of processing on two or more sides of a workpiece without preparing and replacing the workpiece. As a saying, it is a representative CNC machine tool that can continuously perform milling, drilling, and boring while automatically changing cutting tools.

Here, the machining center is similar to general-purpose milling, but on the bed, a column, a knee corresponding to the X, Y, and Z axes, and a servo control mechanism by a servo motor are attached, so that the vertical, forward and horizontal movements are NC It consists of a table made by commands, a spindle on which a cutting tool is mounted, and a controller that inputs and outputs NC commands for controlling the operation of the table light spindle.

In addition, by attaching an automatic tool changer (ATC) that automatically changes 20 to 70 tools according to cutting conditions, various milling operations, drilling and boring operations can be performed at once by automatic tool exchange. As a result, multi-axis machining and multi-process machining are possible with a single setting, which is advantageous for automating the machining process of small quantity parts of many kinds.

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

Thus, when the processing of the workpiece is completed, the operator discharges the workpiece that has been fixed to the jig means for processing, and fixes the new workpiece to the jig means again and repeats the above-described working process. Repetitive processing takes place.

However, the machining center processes the workpiece by controlling the feed of the table where the workpiece is fixed according to the pre-input machining value based on the position of the workpiece fixed on the table, or by controlling the feed of the spindle equipped with a cutting tool. Therefore, the fixed position of the workpiece is very important in the precision processing of the workpiece.

In addition, the time required when attaching and attaching the workpiece to the table of the machining center has a great influence on the productivity of the product. Therefore, in fixing the workpiece to the table of the machining center, the jig means for fixing the workpiece is used with respect to the main shaft. It is installed on the correct reference point in the X and Y axis directions, and the workpiece must be quickly fixed in a certain position even when the jig means is finally fixed to the workpiece.

However, in the case of an unskilled person, even if the workpiece is fixed to the jig means, it takes a lot of time to fix the workpiece to the correct position, resulting in a decrease in the productivity of the product, and after fixing the workpiece to the jig means, processing and processing. After discharging the completed work piece, in the process of repeatedly fixing the new work piece back to the jig means, it is placed in the correct position of the jig means due to a decrease in concentration due to fatigue of the worker or lack of function due to unskilledness. When the workpiece is not fixed, there is a problem that the processing precision of the workpiece is significantly deteriorated and the occurrence rate of defective products increases.

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

The object of the present invention, conceived to solve the above problems, is a multi-axis machine with an improved pitch correction structure that is arranged on a machine tool equipped with a pair of machining axes and aligns a pair of workpieces to the center of each machining axis. It is to provide a jig device for machinery.

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

A jig device for a multi-axis machine tool having an improved pitch correction structure according to the present invention,

A base plate coupled to a table of a multi-axis machine tool having a pair of machining shafts including a reference machining shaft;

A fixed jig part that is fixedly disposed on the base plate and arranged to position an object to be processed in a center of a reference processing axis among processing axes formed on a multi-axis machine tool; And

And a movable jig portion arranged on the base plate and configured to position-align the workpiece to the center of the rest of the machining shafts formed on the multi-axis machine tool,

The movable jig portion includes a workpiece holder for fixing the workpiece; It comprises a movable support that moves the workpiece holder horizontally in the X-axis direction and the Y-axis direction so that the workpiece holder is positioned at the center of the processing axis,

The movable support includes an X-axis pitch correction unit for receiving a thrust in the X-axis direction and moving straight in the X-axis direction to correct the pitch of the workpiece holder in the X-axis direction; A Y-axis pitch correction unit receiving thrust in the Y-axis direction and moving straight in the Y-axis direction to correct the pitch of the workpiece holder in the Y-axis direction; And a traction-compression-type restraint unit configured to traction and compress the mutually stacked X-axis direction pitch correction unit and Y-axis direction pitch correction unit in a vertical direction.

Preferably, the X-axis direction pitch correction unit includes an X-axis pitch correction block that advances and retreats in the left-right direction, that is, the X-axis direction on the base plate; It is configured to include a transfer cylinder for the X-axis for connecting the advance and retreat rod to the X-axis pitch correction block, the X-axis pitch correction block advances and retreats in the X-axis direction through the advance and retreat action of the advance and retreat rod.

More preferably, the Y-axis direction pitch correction unit includes a Y-axis pitch correction block installed on the base plate in a forward/retreat structure in the Y-axis direction; The Y-axis pitch correction block is connected to the advancing and retreating rod, and a Y-axis feed cylinder for advancing and retreating the Y-axis pitch correction block in the Y-axis direction through the advancing and retreating action of the advancing and retreating rod.

In addition, the vertically stacked X-axis pitch correction block and Y-axis pitch correction block are formed to pass through a pitch adjustment hole communicating in a vertical direction,

The traction compression type restraint unit includes a traction cylinder penetrating the lifting rod through a pitch adjustment hole); It is configured to include a traction crimping head that is fixed to the upper end of the lifting rod and attached to the upper surface of the pitch adjustment hole of the X-axis pitch correction block stacked by the lowering of the lifting rod.

As described above, the present invention proposes a jig device in which a fixed jig portion and a movable jig portion are disposed on a base plate, and a workpiece holder provided in each jig portion is positioned at the center of each processing axis provided in a multi-axis machine tool. have.

In addition, the movable support of the movable jig portion is provided by stacking an X-axis (left-right direction) pitch correction unit and a Y-axis (front-to-back direction) pitch correction unit, through which the workpiece holder has a pitch correction in the X-axis and Y-axis directions. Thus, precise pitch correction of the workpiece holder is achieved in the center of the processing shaft disposed on the top.

In particular, in the present invention, the X-axis (left and right) pitch correction unit and the Y-axis (front and rear) pitch correction unit, which have corrected the pitch of the workpiece holder by moving in the X-axis and Y-axis directions, are vertically pulled and compressed. It adheres closely to the contact state, forming a stable fixed state.

Accordingly, in the present invention, the workpiece holder and the workpiece fixed to the workpiece holder can be aligned at the center of the corresponding processing axis by the precise pitch correction action by the movable support, and the movable support after the pitch correction is Since it is fixedly fixed by the traction and compression type restraint unit, even if the tool provided in the processing shaft is cut in and the working force for processing the workpiece is provided, the alignment of the workpiece holder and the workpiece fixed to the workpiece holder is not disturbed. This phenomenon can be prevented, so that improved processing stability can be ensured.

1 is a view showing a state in which a jig device for a multi-axis machine tool having an improved pitch correction structure proposed as a preferred embodiment in the present invention is arranged in a multi-axis machine tool, and FIGS. 2 and 3 are preferred embodiments of the present invention. It shows the overall configuration of a jig device for multi-axis machine tools with an improved pitch compensation structure proposed as
Figure 4 is a movable jig portion of a jig device for a multi-axis machine tool having an improved pitch correction structure proposed as a preferred embodiment in the present invention, correcting the pitch of the workpiece holder through each pitch correction unit constituting the movable support To show the state of being
5 is a movable jig portion of a jig device for a multi-axis machine tool having an improved pitch correction structure proposed as a preferred embodiment in the present invention, showing a detailed configuration of a movable support including a traction and compression type restraint unit,
6 is a view showing a detailed configuration of a tilting connection unit in a traction compression type restraint unit of a jig device for a multi-axis machine tool having an improved pitch correction structure proposed as a preferred embodiment in the present invention,
7 is a movable jig portion of a jig device for a multi-axis machine tool having an improved pitch correction structure proposed as a preferred embodiment of the present invention, showing the restraint state of each pitch correction unit through a traction and compression type restraint unit.

Hereinafter, a jig apparatus for a multi-axis machine tool having an improved pitch correction structure proposed as a preferred embodiment in the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a state in which a jig device for a multi-axis machine tool having an improved pitch correction structure proposed as a preferred embodiment in the present invention is arranged in a multi-axis machine tool, and FIGS. 2 and 3 are preferred embodiments of the present invention. It shows the overall configuration of a jig device for a multi-axis machine tool having an improved pitch correction structure proposed as, and FIG. 4 is a jig device for a multi-axis machine tool having an improved pitch correction structure proposed as a preferred embodiment in the present invention. It shows a state of correcting the pitch of the workpiece holder through each pitch correction unit constituting the movable support, and FIG. 5 has an improved pitch correction structure proposed as a preferred embodiment of the present invention. There is a movable jig part of a jig device for a multi-axis machine tool, showing a detailed configuration of a movable support including a traction and compression type restraint unit, and FIG. 6 is a multi-axis having an improved pitch correction structure proposed as a preferred embodiment in the present invention. In the traction compression type restraint unit of the machine tool jig device, it shows the detailed configuration of the tilting connection, and FIG. 7 is a view of a jig device for a multi-axis machine tool having an improved pitch correction structure proposed as a preferred embodiment in the present invention. There is a movable jig part, which shows the restraint state of each pitch correction unit through the traction compression type restraint unit.

A multi-axis machine tool jig device 1 having an improved pitch correction structure according to the present invention is provided with a pair of machining shafts S1 and S2 including a reference machining shaft S1 as shown in FIG. 1. It is a dedicated device that is installed on the table of a machine tool and arranges and positions the workpiece in the center of each processing shaft (S1, S2) arranged at the top.

The multi-axis machine tool jig device 1 includes a base plate 10 installed on the table 110 of the multi-axis machine tool 100 as shown in FIGS. 2 to 5; A fixed jig part 20 for aligning the workpiece to the center of the reference machining shaft S1 among a pair of machining shafts S1 and S2 fixedly disposed on the base plate 10 and formed in the multi-axis machine tool 100 ; And processing axes (S1, S2) formed on the multi-axis machine tool 100 by horizontally correcting the pitch by being disposed on the base plate 10 and transferring in the X-axis (front and rear) direction and the Y-axis (left and right) directions. Among them, it includes a movable jig portion 30 for aligning and positioning the workpiece at the center of the remaining machining shaft S2.

The fixing jig part 20 includes a fixing support 20A fixed to a point of the base plate 10; It includes a workpiece holder (20B) that is stacked and disposed on the fixed support (20A) to fix the workpiece.

Therefore, the fixed jig portion 20 is aligned in a line with the center of the reference processing shaft S1 provided in the multi-axis machine tool 100, and the workpiece holder 20B and the workpiece are located at the center of the reference processing shaft S1. The workpiece fixed to the holder 20B is positioned so as to be aligned in a line.

The center alignment of the reference machining shaft (S1) and the fixed jig part 20, and the center alignment of the remaining machining shaft (S2) and the movable jig part 30 are measured by a general-purpose measuring sensor. Through the confirmation of the center alignment between each component is a general-purpose technique, detailed description thereof will be omitted in this specification.

Further, the movable jig portion 30 disposed on one side of the fixing jig portion 20 includes a workpiece holder 30B for fixing the workpiece; Movement of aligning the workpiece holder 30B to the center of the processing axis S2 by correcting the pitch of the workpiece holder 30B by moving horizontally on the base plate 10 including the X-axis and Y-axis directions And a block assembly 30A.

Here, the movable jig portion 30 horizontally moves the workpiece holder 30B including the X-axis direction and the Y-axis direction by the movable block assembly 30A to correct the pitch, so that the multi-axis machine tool 100 Among the formed processing shafts S1 and S2, the workpiece is aligned with the center of the remaining processing shaft S2.

That is, as shown in FIG. 4, the movable block assembly 30A constituting the movable jig portion 30 is disposed on the top by pitch-moving the workpiece holder 30B horizontally including the X-axis direction and the Y-axis direction. Make the center of the machining shaft (S2) coincide.

In detail, the movable block assembly 30A receives thrust in the X-axis (left and right) direction and moves straight in the X-axis direction to correct the pitch in the X-axis direction of the workpiece holder 30B. A unit 31; It is arranged to be stacked on the X-axis direction pitch correction unit 31, receives thrust in the Y-axis (forward and backward) direction, and moves straight in the X-axis (forward and backward) direction, and the Y-axis (forward and backward) direction of the workpiece holder 30B It includes a Y-axis direction pitch correction unit 32 for correcting the pitch.

Here, the X-axis direction pitch correction unit 31 includes an X-axis pitch correction block 31a advancing and retreating from the base plate 10 in the left-right direction, that is, in the X-axis direction; For the X-axis to advance and retreat the X-axis pitch correction block (31a) in the X-axis direction through the advancing and retreating action of the advancing and retreating rods 31b-a by connecting the advancing and retreating rods 31b-a to the X-axis pitch correction block 31a. It includes a conveying cylinder 31b.

In addition, the Y-axis (front-to-back) direction pitch correction unit 32 includes a Y-axis pitch correction block 32a installed on the base plate 10 in a forward and backward structure in the Y-axis direction; Y-axis for advancing and retreating the Y-axis pitch correction block 32a through the advancing and retreating action of the advancing and retreating rods 32b-a by connecting the advancing and retreating rods 32b-a to the Y-axis pitch correction block 32a. It is configured to include a transfer cylinder (32b).

Here, each of the transfer cylinders (31b, 32b) may be adopted in various forms, such as an electronic cylinder, a pneumatic cylinder, and in the present invention, as an example, by advancing and retreating the advancing rod through a hydraulic cylinder as shown in FIG. 4, The horizontal transfer of the Y-axis direction pitch correction unit 31 and the Y-axis direction pitch correction unit 32 according to the pitch correction is aimed at.

In this embodiment, a movable support 30A is formed by arranging a Y-axis pitch correction block 32a to be stacked above the X-axis pitch correction block 31a, and the Y-axis pitch correction block 32a The workpiece holder 30B is stacked and fixed on the upper part of the machine.

Accordingly, in the workpiece holder 30B for fixing the workpiece, the pitch in the X-axis direction is adjusted by the X-axis direction transfer of the X-axis direction movable block 31a constituting the movable block assembly 30A, and Y The pitch in the Y-axis direction is adjusted by the Y-axis direction feed of the axial movable block 32b.

Thus, the workpiece holder 30B stacked on the movable block assembly 30A and fixed, and the workpiece fixed to the workpiece holder 30B are X-axis direction and Y-axis by the movable block assembly 30A. The pitch of the direction is adjusted and, as a result, is aligned with the center of the processing shaft S2 disposed thereon.

On the other hand, in the present invention, in the movable support 30A including the pitch correction unit 31 in the X-axis direction and the pitch correction unit 32 in the Y-axis (front and rear) direction, the center of the machining shaft S2 and A traction and compression type restraint unit 33 that allows the pitch correction unit 31 in the X-axis direction and the pitch correction unit 32 in the Y-axis (front and rear) direction to match the workpiece holder 30B to be fixed to the base plate 10 in a standard way. ) Is added.

The traction compression type restraint unit 33 is, as shown in FIGS. 1 and 5 to 7, by restricting the pitch correction unit 31 in the X-axis direction and the pitch correction unit 32 in the Y-axis (front and rear) direction in a standard way, In the process of cutting the workpiece fixed to the workpiece holder 30B through the tool installed on the machining shaft S2, the workpiece holder 30B is prevented from being dislodged from the original position to secure improved machining stability. It is a critical component.

On the other hand, in this embodiment, the X-axis pitch correction block 31a and the Y-axis pitch correction block 32a stacked on the movable support 30A through vertical traction compression are crimped and fixed in a surface contact state, It further includes a traction compression type restraint unit 33 for fixing the workpiece holder 30B in place.

In addition, the vertically stacked X-axis pitch correction blocks 31a and Y-axis pitch correction blocks 32a are formed to pass through a pitch adjustment hole communicating in a vertical direction.

In addition, the traction compression type restraint unit 33 is a traction cylinder (33a) penetrating the lifting rod (33b) through the pitch adjustment holes (31a-a, 32a-a_); and fixed to the upper end of the lifting rod (33b) It includes a traction compression head (33c) that is attached to the upper surface of the pitch adjustment hole (31a-a) of the stacked X-axis pitch correction block (31a) by the lowering of the lifting rod (33b).

At this time, the traction compression head (33c) is composed of a disk body, the lower edge of the traction compression head (33c) is formed with an inclined surface support portion of the inclined structure.

In addition, the upper portion of the pitch adjustment hole (31a-a) formed in the X-axis pitch correction block (31a), an annular shoulder strap (31a-b) that is attached to the bottom edge of the traction compression head (33c) is formed in communication. .

At this time, the diameter of the shoulder compression compression head (33c) is configured to have a diameter smaller than that of the annular shoulder jaw (31a-b) and relatively larger in diameter than the pitch adjustment holes (31a-a, 32a-a), A sufficient clearance is formed between the inner diameter of (31a-b) and the outer diameter of the shoulder compression compression head (33c), and the shoulder compression compression head (33c) is annular shoulder compression jaws (31a-b) by the lowering of the lifting rod. It is configured to attach an annular shoulder to the bottom of the edge at the top of the.

That is, the X-axis pitch correction block 31a and the Y-axis pitch correction block 32a move within the range of the clearance to correct the pitch of the workpiece holder 30B.

Accordingly, the workpiece holder 30B is moved in the Y-axis direction of the pitch correction unit 32 in the Y-axis (front and rear) direction and the movement in the X-axis direction of the X-axis direction pitch correction unit 31. The movable support 30A aligned with the center of) is vertically traction-compressed by a traction-compression-type restraint unit 33 as shown in FIG. 7, and is fixedly fixed to the base plate 10 to be fixed.

That is, the traction compression type restraint unit 33 moves in the X-axis direction of the X-axis direction pitch correction unit 31 constituting the movable support 30A and the Y of the Y-axis (front and rear) direction pitch correction unit 32 During the pitch adjustment process in which the workpiece holder (30B) is aligned with the center of the processing shaft (S2) by moving in the axial direction, the lifting rod (33b) of the traction cylinder (33a) is raised to the workpiece through the movable support (30A). By pitch-moving the holder 30B in the horizontal direction, a pitch correction process of aligning it with the center of the machining shaft S2 is performed.

And, when the pitch correction process is completed, the traction cylinder 33a of the traction compression type restraint unit 33 lowers the lifting rod 33b, so that the traction crimping head 33c is formed on the X-axis pitch correction block. The upper edge of (31a-b) is annularly attached to the bottom.

Accordingly, the vertically stacked X-axis pitch correction blocks 31a and Y-axis pitch correction blocks 32a are compressed in the Z-axis (vertical) direction by the traction pressing head 33c, and as a result, these X-axis pitch correction blocks The (31a) and the Y-axis pitch correction block (32a) are fixed by rubbing against each other by forming a surface contact state.

Thus, the X-axis pitch correction block (31a) and the Y-axis pitch correction block (32a) constituting the movable support (30A) are formed by rubbing in a surface contact state by traction compression by a traction compression type restraint unit (33). And as a result, even if external force is provided through the tool installed on the processing shaft (S2), the movable support (30A) and the workpiece holder (30B) are prevented from being deviated from the center of the processing shaft (S2) due to separation from the correct position. Can be.

In addition, in this embodiment, the lifting rod (33b) of the traction cylinder (33a) constituting the traction compression type restraint unit (33), and the traction compression head (33c) annularly attached to the annular shoulder shoulder (31a-b) A tilting connection part 34 is provided therebetween.

According to this embodiment, the tilting connection part 34 includes a spherical socket 34a having a spherical contact surface 34a-a; The spherical member 34b includes a spherical member 34b contacting the inner wall of the spherical socket 34a in a spherical surface 34b-a structure, and the spherical member 34b is configured to be tilted at various angles.

Therefore, the traction crimping head 33c is fluidly tilted according to the inclination of the annular shoulder chin (31a-b) as shown in FIG. 7 to be in close contact with the annular shoulder chin (31a-b) at an optimal angle, and as a result, traction crimping The head 33c can stably traction and close contact between the stacked X-axis pitch correction block 31a and Y-axis pitch correction block 32a to achieve a stable restraint therebetween.

1. Jig device for multi-axis machine tools
10. Base plate
20. Fixing jig part 20A. Fixed support
20B. Workpiece holder 30. Movable jig part
30A. Movable support 30B. Workpiece holder
31. X-axis (left-right direction) pitch correction unit 31a. Pitch correction block for X axis
31a-a. Pitch adjusting hole 31a-b. Annular shoulder jaw
31b. X-axis transfer cylinder 31b-a. Dilemma road
32. Y-axis (front and rear) pitch correction unit 32a. Y-axis pitch correction block
31a-a. Towing crimp 32b. Y-axis feed cylinder
32b-a. Advance and retreat rod 33. Traction compression type restraint unit
33a. Towing cylinder (for Z-axis towing) 33b. Lifting rod
33c. Towing crimp head 33c-a. Inclined support
34. Tilting connection 34a. Spherical socket
34b. Spherical member
100. Machine tool 110. Table
S1, S2. Machining axis

Claims (4)

A base plate coupled to a table of a multi-axis machine tool having a pair of machining shafts including a reference machining shaft;
A fixed jig part which is fixedly disposed on the base plate and arranged to position a workpiece in a center of a reference machining axis among machining axes formed in a multi-axis machine tool; And
It comprises a movable jig portion that is disposed on the base plate to align the position of the workpiece to the center of the remaining machining axis among the machining shafts formed in the multi-axis machine tool,
The movable jig portion includes a workpiece holder for fixing the workpiece; It comprises a movable support that moves the workpiece holder horizontally in the X-axis direction and the Y-axis direction so that the workpiece holder is positioned at the center of the processing axis,
The movable support includes an X-axis pitch correction unit for receiving a thrust in the X-axis direction and moving straight in the X-axis direction to correct the pitch of the workpiece holder in the X-axis direction; A Y-axis pitch correction unit which receives thrust in the Y-axis direction and moves straight in the Y-axis direction to correct the pitch of the workpiece holder in the Y-axis direction; And a traction compression type restraint unit configured to traction and compress the mutually stacked X-axis direction pitch correction unit and Y-axis direction pitch correction unit in a vertical direction to restrain the multi-axis machine tool with an improved pitch correction structure. For jig device. The apparatus of claim 1, wherein the X-axis direction pitch correction unit comprises: an X-axis pitch correction block advancing and retreating from the base plate in a horizontal direction, that is, an X-axis direction; An improved pitch correction structure comprising an X-axis transfer cylinder for connecting an advancing rod to the X-axis pitch correction block and moving the X-axis pitch correction block forward and backward in the X-axis direction through the advancing and retreating action of the advancing and retreating rod. Jig device for multi-axis machine tools. The apparatus of claim 2, wherein the Y-axis direction pitch correction unit comprises: a Y-axis pitch correction block installed on the base plate in a forward/retreat structure in the Y-axis direction; An improved pitch correction structure comprising a transfer cylinder for the Y-axis, which connects the advance and retreat rod to the Y-axis pitch correction block and advances and retreats the Y-axis pitch correction block in the Y-axis direction through the advancing and retreating action of the advance and retreat rod. A jig device for multi-axis machine tools. The method of claim 3, wherein the vertically stacked X-axis pitch correction blocks and Y-axis pitch correction blocks are formed to penetrate through a pitch adjustment hole communicating vertically with each other,
The traction compression type restraint unit includes a traction cylinder penetrating the lifting rod through a pitch adjustment hole); Multi-axis having an improved pitch correction structure, characterized in that it comprises a traction crimping head fixed to the upper end of the lifting rod and attached to the upper surface of the pitch adjustment hole of the X-axis pitch correction block stacked by the lowering of the lifting rod. Jig device for machine tools.

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