JP2012218138A - Tool changer of working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool changer of a working machine which houses more tools and exerts no influence on smoothness and convenience in tool replacement.SOLUTION: The tool changer of a working machine includes a track board, a tool board, and a plurality of clamp arms. The track board has a guide groove in the circumferential edge. A guide groove portion positioned in an upper portion of the track board is formed in a semi-circle shape, and a guide groove portion positioned in a lower portion of the track board is formed in a semi-ellipse shape. The tool board is positioned on one side of the track board, faces the guide groove, and rotates relative to the track board, having supporting arms provided radially and at equal intervals in the circumferential edge of the tool board. The clamp arms are each pivotally coupled with the supporting arm to clamp a tool, and a positioning spherical body to be received within the guide groove is provided in the clamp arm. When a supporting arm approaches the lower portion of the track board, the clamp arm coupled with the supporting arm swings outward, thereby creating a relative large spacing between the clamp arm and the neighboring clamp arm, so that, in installing a tool, interruption of and collision with clamp arms on both sides are prevented, the probability of tool changing error is decreased, and saves the time for exchanging the tool.

Description

  The present invention relates to a tool changer for a processing machine, and more particularly to a tool changer that can increase the number of tools to be accommodated and does not affect the smoothness and convenience of tool change.

  Generally, it is applied to the general processing machine of vertical lathe or milling machine machining center, and in order to store general heavy cutting tools or light cutting tools of different standards and usages, it usually has tool magazines and tools in the main spindle part. A tool change mechanism combined with the magazine is arranged so that the machining spindle automatically serves to select and install the tool and thereby perform various machining operations on the workpiece.

  In order to increase the competitiveness and efficiency of traditional work, the industry now increases the tool magazine capacity of the tool magazine so that it can be changed to a different form of tool at any time. One way to increase the general tool capacity is to increase the volume of the tool magazine, and the other is to increase the number of clamp arms used to clamp the tool inside the tool magazine. It is possible to hold and hold the tool.

  However, when the volume of the tool magazine is increased, the weight of the tool board tends to increase as the volume of the tool board increases. For this reason, since the processing machine on which the tool board is arranged carries an excessive weight, the state of deformation or inclination is reduced. Occurs and affects the accuracy of the machining process.

  When the number of clamp arms that clamp the tool inside the tool magazine is increased, the general clamp arm is fixed to the peripheral edge of the tool panel and exhibits an adjacent form. It is also susceptible to interference from other tools, which makes alignment difficult or fails to install smoothly, creating a collision situation and causing distortion and deformation of the machining spindle, thereby affecting the accuracy of the machining process. Occurs.

  Accordingly, a main object of the present invention is to provide a tool changer for a processing machine that can increase the number of tools accommodated and does not affect the smoothness and convenience during tool change.

  In order to achieve the above-mentioned object, a tool changer for a processing machine according to the present invention is arranged in a processing machine, which includes a raceway, a tool board, and a plurality of clamp arms.

  The washer has a guide groove near its periphery, and the washer can pass through the center of a circle and be divided into two upper and lower parts by a straight line with two ends extending to the center line of the guide groove. The guide groove located in the upper part of the washer has a semicircular shape configured with a straight line a as a set radius, and the guide groove located in the lower part of the washer has a straight line a as a set major axis radius, It exhibits a semi-elliptical shape configured with b as a set minor axis radius, and both are connected to each other to form a guide path of the guide groove.

  The tool board is provided on one side of the washer, faces the guide groove, rotates with respect to the washer, and a plurality of support arms are radially arranged at equal distances on the periphery of the tool board. Has been.

  Positioning sphere that is pivotally connected to the plurality of clamp arms and is used to clamp a tool, and a convex column is provided on the clamp arm, and is accommodated at the upper end of the convex column corresponding to the guide groove Is provided.

  Since the guide groove at the lower part of the raceway has a semi-elliptical shape, the distance from the end of each support arm of the tool board to the guide groove is not equal. Among them, the one that approaches the short axis b at the lower part of the washer of the support arm, the clamp arm connected to it rotates outward, and its rotation angle is larger than the other clamp arms. A relatively large gap is formed between the clamp arms, preventing interference and collision by the clamp arms on both sides when installing the tool, reducing the probability of tool change errors, saving time for tool change, and improving machining efficiency. Up.

It is a main structure display figure which applied the desirable example of the present invention to a processing machine. FIG. 2 shows a local section view of the preferred embodiment, showing the local portion of FIG. 1. 1 is a plan view of a washer according to a preferred embodiment of the present invention. It is a display figure of the clamp arm of the Example of this invention. It is an implementation display figure of the preferable Example of this invention.

  In order to describe in detail the technical contents, structural features, and objects to be achieved of the present invention, examples will be described below in combination with the drawings. The front / rear, left / right, top / bottom, top / bottom, and horizontal / vertical are for reference only, and are used only for the convenience of the description. Not limited. The dimensions specified in the drawings and specification may vary as required by the design of specific embodiments of the invention and within the scope of the invention without departing from the scope of the claims of the invention.

  Please refer to FIG. 1 and FIG. FIG. 1 is a diagram showing the main structure of a preferred embodiment of the present invention applied to a processing machine. FIG. 2 is a local view of FIG. 1 and is a local cross-sectional display of the preferred embodiment.

  The tool changer (1) for a processing machine according to the present invention is disposed on a machine base (2) of the processing machine. As shown, the machine base (2) includes a power unit (20) and a spindle head (21) installed on the machine base (2). The spindle head (21) is driven by the power unit (20) to reciprocate vertically. An interlocking mechanism (22) is provided at a front portion of the machine base (2) facing the spindle head (21), and the interlocking mechanism (22) is used to drive the tool changer (1).

  The tool changer (1) of the present invention is disposed obliquely on the machine base (2) via an interlocking mechanism (22), which comprises a washer (10), the washer (10) being the center. Is fixed to the shaft column (220) extended from the interlocking mechanism (22) and connected to the machine base (2).

  The tool changer (1) of the present invention further comprises a circular tool board (11), and a hollow shaft attachment part (110) is provided at the center of the tool board (11), and the outside of the shaft column (220). Fitted. A bearing (111) is provided between the shaft mounting part (110) and the shaft column (220), whereby the tool disk (11) is driven via the interlocking mechanism (22) to thereby provide a bearing disk (10). Rotates coaxially with respect to

  The tool changer (1) of the present invention further comprises a plurality of clamp arms (12), which are pivotally connected to the peripheral portion of the tool board (11) and used to clamp the tool (3).

  Please refer to FIG. Also refer to FIGS. 1 and 2 together. FIG. 3 is a plan view of a washer according to a preferred embodiment of the present invention.

  As shown in FIG. 3, the feature of the present invention is that it is inwardly equidistantly along the inside of the contour of the washer (10) in a portion close to the inner peripheral edge of the washer (10). A ring-shaped flange portion (100) is provided in a biased manner, and a guide groove (101) is formed in the flange portion (100).

  The washer disk (10) is divided into two upper and lower parts by a straight line D passing through the center of a set circle and extending at both ends to the center of the guide groove (101). The guide groove (101) located in the upper part of the washer disk (10) has a semicircular shape having the straight line a as a radius, and the length of the straight line a is one half of the straight line D. The guide groove (101) located at the lower part of the washer disk (10) has a semi-elliptical shape in which the straight line a is a major axis radius and the straight line b is a minor axis radius, the straight line b is shorter than the straight line a, The extending line of the straight line b intersects with the machining axis of the spindle head (21). The upper guide groove (101) and the lower guide groove (101) are connected to each other to form a guide path for the guide groove (101).

  A plurality of support arms (112) arranged radially and equally on the circumference of the tool board (11) are provided on the periphery of the tool board (11). The support arms (112) are arranged between the support arms (112). The angle formed with the center of the circle is equal, a pivot rod (113) is formed at the end of the support arm (112), and an arcuate surface (114) is formed at the bottom end of the end of the support arm (112). Is formed.

  Among them, the radius from the center of the tool board (11) to the end of the support arm (112) is not more than the straight line a at the upper part of the washer disk (10) and larger than the straight line b at the lower part of the washer disk (10).

  Please refer to FIGS. 1 to 3 together with FIG. FIG. 4 is a display diagram of the clamp arm according to the embodiment of the present invention.

  The clamp arm (12) described above includes a pivoting seat (13) and a clamping plate (14). One end of the pivoting sheet (13) is provided with a pivoting hole (130) penetrating both side surfaces, and the pivoting rod (113) of the support arm (112) is pivoted. A convex column (131) is provided on the upper surface of this end, and a positioning sphere (132) accommodated in correspondence with the guide groove (101) is formed on the upper end of the convex column (131). Is provided with a groove (133) through which the support arm (112) enters.

  A slanted groove surface (134) is formed on the inner wall of the groove opening (133) to restrain the support arm (112) of the tool panel (11) and to set the rotation angle of the clamp arm (12) with respect to the support arm (112). limit. A second arcuate surface (136) corresponding to the arcuate surface (114) at the bottom end of the support arm (112) is formed inside the groove opening (133), whereby the clamp arm (12) rotates more smoothly. Is called. A pivot part (135) is provided at a different end of the pivot sheet (13).

  One end of the clamping plate (14) is pivotally connected to the pivotal portion (135) of the pivotal seat (13), and a second groove opening (140) is provided at this end, and the second groove opening (140) A pivot piece (141) is formed on both sides, and a pivot pin (120) is passed through to pivot on the pivot portion (135). A torque spring (121) fitted to the pivot pin (120) is provided on the inner side of the second groove opening (140), thereby providing an urging force to the pivot seat (13) and the clamping plate (14). Is supported, whereby the clamping plate (14) is positioned relative to the pivoting sheet (13). Arc ends (142) for clamping the tool (3) are provided at different ends of the clamping plate (14).

  Please refer to FIG. 5 together with FIGS. FIG. 5 is an implementation display diagram of a preferred embodiment of the present invention.

  At the time of execution, the clamp arm (12) is pivotally connected to the support arm (112) at the periphery of the tool board (11), and the tool board (11) is the shaft column (220) of the interlocking mechanism (22) at the shaft attachment portion (110). ), Is opposed to the washer (10), and is received in the positioning sphere (132) of the clamp arm (12) in the guide groove (101) of the washer (10), whereby the clamp arm (12). The pivoting seat (13) of the support is rotated around the pivoting rod (113) of the support arm (112), exhibits a set angle, and holds the tool (3). This constitutes an aspect of a disk-type tool magazine.

  Among them, the guide groove (101) located on the upper part of the washer disk (10) has a semicircular shape, and the distance from the end of the support arm (112) of the tool board (11) to the guide groove (101) The clamp arms (12) connected to the guide groove (101) via the positioning sphere (132) are equal in rotation angle to the tool board (11), and a plurality of sets of tools (3) can be clamped.

  The guide groove (101) located in the lower part of the washer disk (10) has a semi-elliptical shape, and the distance from the end of each support arm (112) of the tool board (11) to the guide groove (101) is not the same.

  The support arm (112) approaching the major axis a of the upper guide groove (101) is such that the distance from the end of the support arm (112) to the guide groove (101) is higher from the end of the support arm (112). The distance to the guide groove (101) is approached, so that the rotation angle of the clamp arm (12) connected to the support arm (112) also approaches the one located at the upper part.

  The support arm (112) approaching the short axis b at the bottom of the washer (10) has the shortest distance from the end of the support arm (112) to the guide groove (101), and the positioning sphere (132) is guided through the guide groove. The clamp arm (12 ′) connected to the support arm (112) to be accommodated in (101) thus rotates outwardly, so that its rotation angle is greater than the adjacent clamp arm (12), A relatively large distance is formed between the adjacent clamp arms (12).

  With this design, when the tool (3) to be provided on the clamp arm (12 ′) is a tool, the interlocking mechanism (22) drives and rotates the tool board (11), and the clamp arm (12 ′) is moved to the washer disk (10). ) To the short axis b portion of the washer (10) along the guide groove (101). At this time, a relatively large distance is formed between the clamp arm (12 ′) and the adjacent clamp arm (12) by the above-described rotation operation, providing a sufficient mounting space, and when the tool (3) is mounted, Interference or collision between the adjacent clamp arms (12) is prevented.

  After that, the elastic force of the torque spring (121) between the pivot seat (13) and the clamping plate (14) allows the tool (3) to be quickly aligned and attached, and the probability that a tool change error will occur. Reduce the time required for tool change and increase machining efficiency.

  The above description is only an example of the present invention, and does not limit the scope of the present invention. Any equivalent changes and modifications that can be made based on the scope of the claims of the present invention are all described in the present invention. Shall belong to the scope covered by the rights.

DESCRIPTION OF SYMBOLS 1 Tool changer 114 Arc surface 10 Track disk 12 Clamp arm 100 Flange part 13 Pivoting sheet 101 Guide groove 130 Pivoting hole 11 Tool board 131 Convex pillar 110 Axis mounting part 132 Positioning sphere 111 Bearing 133 Groove port 112 Support arm 134 Slanted groove Surface 113 Pivoting rod 135 Pivoting portion 136 Second arc surface 20 Power unit 14 Holding plate 21 Spindle head 140 Second groove port 22 Interlocking mechanism 141 Pivoting piece 220 Shaft column 142 Arc-shaped groove port 3 Tool 2 Machine base

Claims (6)

In the tool changer of the processing machine, it is attached to the processing machine,
A washer, which is fixed to the machine base of the processing machine, has a guide groove near the periphery, passes through the center of the circle, and has two ends extending to the center line of the guide groove. The guide groove located at the upper part of the washer has a semicircular shape configured with the straight line a as a set radius, and the guide groove located at the lower part of the washer has a straight line a. The above washer, which has a set major axis radius, has a semi-elliptical shape configured with a straight line b as a set minor axis radius, and is connected to each other to form a guide path of the guide groove;
A tool board provided on one side of the washer so as to face the guide groove, rotate with respect to the washer, and a plurality of support arms are arranged radially equidistantly on the periphery of the tool board. The above-mentioned tool board,
A plurality of clamp arms, which are used to clamp the tool by being pivotally connected to the support arm, and a convex column is provided on the clamp arm, and the upper end of the convex column is accommodated corresponding to the guide groove The plurality of clamp arms provided with positioning spheres to be performed;
A tool changer for a processing machine, comprising:   The tool changer for a processing machine according to claim 1, wherein a length from the center of the tool board to the end of the support arm is equal to or shorter than a straight line a at the upper part of the washer and larger than a straight line b at the lower part of the washer. A tool changer for a processing machine.   2. The tool changer for a processing machine according to claim 1, wherein the clamp arm further includes a pivoting sheet and a clamping plate, and the convex column is provided at one end of the pivoting sheet, and the support is disposed on the bottom surface of the end. A slot for entering the arm was provided, one end of the clamping plate was pivoted to a different end of the pivot sheet, and an arc-shaped slot for clamping the tool was provided at a different end of the clamping plate A tool changer for a processing machine.   4. The tool changer for a processing machine according to claim 3, wherein an arc surface is provided on the bottom edge of the end of the support arm, and a second arc surface corresponding to the arc surface is provided on the inner edge of the groove of the pivot sheet. A tool changer for a processing machine, characterized in that   4. The tool changer for a processing machine according to claim 3, wherein a slant groove surface is provided on an inner wall of the groove opening.   The tool changer for a processing machine according to claim 3, wherein a second groove opening is provided in a pivoting portion of the pivoting sheet and the clamping plate, and a torque spring is provided in the second groove opening. Tool changer for processing machines.

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