JP2014161931A - Processing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce damage of peripheral devices and components when abnormality occurs in the fitting of a ram and an attachment, during replacement of the attachment of a processing machine.SOLUTION: The processing machine includes: a ram 5 for rotatably supporting a main shaft 6; and a loading device 40 capable of supporting, at a predetermined attachment preparation position, a body 20 to be replaced capable of being attached to the ram 5. The ram 5 is moved in an attachment direction to the body 20 to be replaced at the predetermined attachment preparation position, an attachment protrusion 31 provided at the body 20 to be replaced is fitted into an attachment hole 11 provided at the ram 5, thereby the body 20 to be replaced is attached to the ram 5. The loading device is provided with a support part 60 capable of being displaced in the attachment direction of the body 20 to be replaced to the ram 5. When the movement of the ram 5 in the attachment direction makes the ram 5 interfere with the body 20 to be replaced, the support part 60 is displaced to allow the movement of the ram 5 and the body 20 to be replaced.

Description

  The present invention relates to a processing machine capable of exchanging attachments.

  There is a processing machine capable of multi-surface processing in order to perform various processing on a workpiece. Conventionally, by rotating a workpiece, multi-face machining can be performed in a processing machine. At present, by attaching a tool to the spindle via an attachment, it is possible to process a fixed workpiece from various angles.

  When assembling the ram and attachment of the processing machine, a positioning knock, a positioning key, or the like is used to align the relative positions of the ram and attachment and to correctly assemble the ram and attachment. For example, it is possible to match the relative positions of the ram and the attachment by providing a positioning hole in the ram and providing a positioning protrusion on the attachment and fitting the positioning hole in the ram with the positioning protrusion in the attachment.

  Moreover, in a processing machine, in order to perform various processes with respect to a workpiece | work, it is necessary to replace | exchange the tool and attachment with which it uses for a process according to a process site | part etc. suitably. That is, it is possible to unmanned various types of processing in the processing machine by automating the processing applied to the workpiece by a program or the like and automating the exchange of the tool and the attachment.

  The replacement of the attachment in the processing machine is performed by placing the attachment on a replacement table at a predetermined position, moving the ram to the predetermined position, and lowering the ram with respect to the attachment. At this time, the positioning protrusions formed on the attachment and the positioning holes formed on the ram are fitted to adjust the relative positions of the ram and the attachment, and the attachment is held by a hydraulic mechanism or the like provided on the ram. .

JP 7-251353 A

  When replacing the attachment, the position of the exchange base with respect to the processing machine or the position of the attachment with respect to the exchange base is slightly shifted, or attachment (such as chips from processing) is sandwiched between the exchange base and the attachment. May be tilted. In such a case, even if the ram is lowered with respect to the attachment, the positioning protrusion formed on the attachment and the positioning hole formed on the ram do not fit together, and the ram and the attachment interfere with each other.

  In the conventional processing machine, there is no one that detects the interference between the attachment and the ram. Therefore, when replacing the attachment, the ram is further lowered even though the attachment and the ram interfere with each other, and the attachment, the ram, the exchange base, etc. may be damaged.

  The invention described in Patent Document 1 detects an interference between an attachment or the like in a processing machine and a workpiece by an alternating current passing through the center portion. It is conceivable that this technique is employed for attachment replacement, and the lowering of the ram is stopped when the ram and the attachment interfere with each other. However, if the ram and the attachment merely cause an abnormality, the abnormality is regarded as abnormal although the fitting between the ram positioning hole and the attachment positioning projection is a normal operation. That is, it is difficult to correctly determine a normal operation in which the ram and the attachment are fitted and an abnormal operation in which the ram and the attachment interfere with each other.

  The present invention has been made in view of the above problems, and an object of the present invention is to reduce damage to peripheral devices and parts at the time of abnormal fitting between a ram and an attachment in an attachment replacement operation in a processing machine. .

  A processing machine according to a first invention for solving the above-described problems includes a ram that rotatably supports a main shaft, and a loading device that can support an exchangeable body that can be assembled to the ram at a predetermined assembly preparation position. In the processing machine in which the ram is moved in the assembly direction with respect to the exchanged body at the predetermined assembly preparation position, and the ram and the exchanged body are assembled. A support part that is displaceable in the assembly direction of the ram and the exchanged object is provided, and the support part is displaced when the ram and the exchanged object interfere with each other due to movement in the assembly direction of the ram. Then, the ram and the exchanged body are allowed to move.

  A processing machine according to a second invention for solving the above-mentioned problems is the processing machine according to the first invention, wherein the loading device detects that the exchanged body is in the predetermined assembly preparation position. And a second detecting means for detecting that the member to be exchanged has been moved from the predetermined assembly preparation position.

  A processing machine according to a third invention for solving the above-mentioned problems is the processing machine according to the second invention, wherein the first detecting means can detect the presence or absence of the exchanged object at the predetermined assembly preparation position. As the second detection means, as the second object is moved from the predetermined assembly preparation position, the detector is connected to the replacement object at the predetermined assembly preparation position. A moving means for moving the presence / absence to a position where it cannot be detected is provided.

  A processing machine according to a fourth invention for solving the above-mentioned problems is the processing machine according to the third invention, wherein the moving means is a holding member that holds the detector, the ram in an interfered state, and the exchanged object. A transmission member for transmitting the movement of the body to the holding member is provided, and the holding member is deformed or moved by the transmission member.

  A processing machine according to a fifth invention for solving the above-mentioned problems is the processing machine according to the second invention, wherein the first detecting means can detect the presence or absence of the exchanged object at the predetermined assembly preparation position. A detector separate from the detector capable of detecting the presence or absence of the exchanged object at a position that can be moved from the predetermined assembly preparation position. It is characterized by.

  According to the processing machine according to the first aspect of the invention, since the support portion can be displaced in the assembly direction of the ram and the exchanged body, the support portion is displaced when the ram and the exchanged body interfere. Since the member to be exchanged is moved from the predetermined assembly preparation position, the ram and the member to be exchanged are allowed to move, and the loading device or the like is not immediately damaged.

  According to the processing machine according to the second invention, the first detecting means for detecting that the exchanged body is in the predetermined assembly preparation position, and the exchanged body has been moved from the predetermined assembly preparation position. It is possible to detect that an abnormality has occurred in the assembling work between the ram and the member to be exchanged. Therefore, it is possible to prevent the loading device and the like from being damaged by stopping the ram moving operation or the like when an abnormality is detected.

  According to the processing machine according to the third invention, a detector is provided as the first detection means, and the detector is provided as the second detection means in accordance with the movement of the exchanged object from the predetermined assembly preparation position. By moving the presence / absence of the exchanged object to a position where it cannot be detected, it is possible to detect the normality and abnormality of the assembly operation between the ram and the exchanged object with only one detector. As a result, an increase in production cost can be suppressed.

  According to the processing machine according to the fourth aspect of the present invention, since the holding member is merely provided as the moving means of the detector, an increase in manufacturing cost can be suppressed and a simple structure can be achieved.

  According to the processing machine according to the fifth aspect of the invention, by providing a detector as the first detection means and providing another detector as the second detection means, the assembly work of the ram and the exchanged object Normality and abnormality can be reliably detected.

It is explanatory drawing which shows replacement | exchange of the attachment in the processing machine which concerns on Example 1. FIG. It is explanatory drawing which shows replacement | exchange of the attachment in the processing machine which concerns on Example 1. FIG. It is explanatory drawing which shows replacement | exchange (normal time) of the attachment in the processing machine which concerns on Example 1. FIG. It is explanatory drawing which shows replacement | exchange (at the time of abnormality) of the attachment in the processing machine which concerns on Example 1. FIG. 1 is a schematic perspective view showing a processing machine according to Embodiment 1. FIG. It is explanatory drawing which shows the support part (normal time) of the exchange stand in the processing machine which concerns on Example 1. FIG. It is explanatory drawing which shows the support part (at the time of shortening) of the exchange stand in the processing machine which concerns on Example 2. FIG. It is explanatory drawing which shows replacement | exchange of the attachment in the processing machine which concerns on Example 2. FIG. It is explanatory drawing which shows replacement | exchange (at the time of normal) of the attachment in the processing machine which concerns on Example 2. FIG. It is explanatory drawing which shows replacement | exchange (at the time of abnormality) of the attachment in the processing machine which concerns on Example 2. FIG.

  Hereinafter, embodiments of a processing machine according to the present invention will be described in detail with reference to the accompanying drawings. In the processing machine according to the present invention, even if the ram does not stop the descending operation immediately upon abnormal interference between the ram and the attachment, the ram is displaced by the elastic body supported by the attachment, and the abnormal attachment is detected by detecting the displaced attachment. Judgment is made. Needless to say, the present invention is not limited to the following examples, and various modifications can be made without departing from the spirit of the present invention.

  Initially, the structure of the processing machine which concerns on Example 1 of this invention is demonstrated with reference to FIG. 1 thru | or FIG. 6B.

  As shown in FIG. 5, the processing machine according to the present embodiment is installed on a bed 1 that is installed horizontally on the floor, a portal column 2 that is installed across the bed 1, and a front surface of the column 2. A cross rail 3 movable in the Z-axis direction (vertical direction) with respect to the column 2, a saddle 4 installed on the cross rail 3 and movable in the Y-axis direction (horizontal direction), and a saddle A ram 5 gripped by 4 and movable in the Z-axis direction with respect to the saddle 4; and a spindle 6 supported by the ram 5 and rotatable in the C-axis direction (around an axis parallel to the Z-axis) with respect to the ram 5; Have

  The processing machine according to the present embodiment can perform multi-face processing, and an attachment track 7 for storing various attachments is provided in the vicinity of the column 2. In FIG. 5, an attachment 20 is attached as a protective plate for protecting the lower surface 10 of the ram 5 when performing 0 ° processing (processing for rotating the tool around the Z axis). By attaching the attachment 20 that is a protective plate to the ram 5 at the time of 0 ° machining, it is possible to prevent chips or the like due to machining from adhering to the lower surface 10 (surface to which the attachment 20 is attached) of the ram 5.

  Other attachments (not shown) are stored in the attachment track 7. Other attachments (not shown) include, for example, a right angle (not shown) for converting the rotational movement of the main shaft by 90 ° and transmitting it when performing 90 ° machining (machining to rotate the tool around the X axis or Y axis). There are heads.

  As shown in FIGS. 1 to 4, a mounting hole 11 for mounting the attachment 20 is formed in the lower surface 10 of the ram 5 along the mounting direction (vertical direction in FIGS. 1 to 4), and the upper surface of the attachment 20. An attachment projection 31 for attaching to the ram 5 is formed on the 30 (surface attached to the ram) so as to protrude along the attachment direction.

  The attachment 20 is positioned with respect to the ram 5 by fitting between the attachment hole 11 in the ram 5 and the attachment protrusion 31 in the attachment 20, and is held by the ram 5 by a hydraulic mechanism (not shown). Note that the attachment 20 is appropriately exchanged in various processes, and is stored in the attachment track 7 (FIG. 5) so as to prevent processing chips and the like from adhering except when attached to the ram 5 and used.

  Of course, the positioning and mounting method of the ram and attachment in the present invention is not limited to positioning by fitting of the mounting hole 11 in the ram 5 and the mounting protrusion 31 in the attachment 20 and mounting by a hydraulic mechanism (not shown). For example, a mounting protrusion may be provided on the ram and a mounting hole may be provided on the attachment, and the ram and attachment may be positioned by fitting the mounting protrusion on the ram and the mounting hole on the attachment. The ram and attachment may be positioned and attached by other methods.

  The attachment 20 is exchanged in the ram 5 at a predetermined position (not shown) that is in the range of motion of the ram 5 and in the vicinity of the attachment track 7 by using the exchange table 40. As shown in FIGS. 1 to 4, the exchange table 40 includes a flat plate-like main body 50 and a support 60 that supports the attachment 20.

  The support portion 60 is provided so as to protrude to the front side (the upper side in FIGS. 1 to 4) on which the attachment 20 is loaded in the main body portion 50, and is formed on the main body portion 50 as shown in FIGS. 6A and 6B. A bolt 62 is inserted into the hole 51 from the front side of the main body 50 via a coil spring 61 that is an elastic body, and is passed through to the back side (the lower side in FIGS. 1 to 4) where the attachment 20 in the main body 50 is not stacked. A nut 63 is attached to the tip of 62.

  In the replacement of the attachment 20 in the ram 5, the attachment 20 is loaded in contact with only the head of the bolt 62 in the support portion 60 without contacting the main body portion 50 of the replacement base 40. When the exchange is abnormal, the ram 5 slides to apply a downward force to the attachment 20 in the Z-axis direction. Therefore, as shown in FIGS. 6A and 6B, the bolt 62 and the nut 63 in the support portion 60 of the exchange table 40 are displaced along the Z-axis direction together with the attachment 20 due to the elastic deformation of the coil spring 61.

  That is, when the coil spring 61 is elastically deformed, the support portion 60 can be displaced in the assembly direction (Z-axis direction) between the ram 5 and the attachment 20, and the ram 5 and the attachment 20 in a state where the support portion 60 interferes. Can be allowed to move.

  In addition, when the attachment 20 is loaded, the initial deflection amount of the coil spring 61 is adjusted by changing the tightening amount of the bolt 62 and the nut 63 so that the coil spring 61 is not contracted only by the weight of the attachment 20. A predetermined initial load that can withstand the loading of the attachment 20 is set on the coil spring 61. Further, a predetermined initial load that can withstand the loading of the attachment 20 may be set by changing the type (spring coefficient, total length, etc.) of the coil spring 61.

  Of course, the support part 60 which supports the attachment 20 in the present invention is not limited to the coil spring 61, the bolt 62, and the nut 63 of the present embodiment. It suffices that the support portion 60 that supports the attachment 20 can be elastically displaced along the attachment direction (Z-axis direction) between the ram 5 and the attachment 20. For example, instead of the coil spring 61, bolts may be used via rubber or the like. 62 and the nut 63 may be attached to the main body 50, or the coil spring 61 may be fixed without using the bolt 62 and the nut 63.

  As shown in FIGS. 1 to 4, the attachment in a state of being loaded on the exchange table 40 (predetermined assembly preparation position) so that the presence or absence of the attachment 20 in the state of being loaded on the exchange table 40 can be detected. A proximity sensor 70 as a first detection means is provided so as to be positioned in the vicinity of 20.

  Furthermore, in the present embodiment, when the assembly of the ram 5 and the attachment 20 is poor, the ram 5 presses the attachment 20, and the attachment 20 can detect the attachment 20 in a state where the coil spring 61 is contracted and lowered. As shown in FIG. 4, a proximity sensor 80 as a second detection unit is provided in the vicinity of the attachment 20 in a lowered state (a position lower than a predetermined assembly preparation position).

  The proximity sensors 70 and 80 are fixed so that the detection position does not move even when the assembly of the ram 5 and the attachment 20 is poor. For example, the proximity sensors 70 and 80 in this embodiment are fixed to the main body 50 of the exchange table 40 via a bracket (not shown).

  Next, attachment replacement in the processing machine according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 6B.

  In a state where the predetermined attachment 20 is attached to the ram 5, after performing predetermined processing on a workpiece not shown, the processing machine replaces the attachment 20. The attachment 20 is exchanged by using the exchange table 40 at a predetermined position (not shown) that is in the movable range of the ram 5 and in the vicinity of the attachment track 7.

  First, the ram 5 to which the attachment 20 is attached is moved to a predetermined position by the sliding motion of the cross rail 3 and the saddle 4. Further, the exchange table 40 loaded with nothing in the attachment track 7 is moved from the attachment track 7 to the predetermined position by a moving mechanism (not shown).

  Next, at a predetermined position, the ram 5 with the attachment 20 attached to the lower surface 10 is slid downward in the Z-axis direction with respect to the exchange table 40 (FIG. 2) on which nothing is loaded, so that the lower surface 32 of the attachment 20 It contacts with the front-end | tip part of the support part 60 of the exchange stand 40 (FIG. 3).

  At this time, the attachment 20 is located in the vicinity of the proximity sensor 70, and the proximity sensor 70 can detect that the attachment 20 is located on the exchange table 40. When the proximity sensor 70 detects the attachment 20, a hydraulic mechanism (not shown) in the ram 5 is activated. The holding of the attachment 20 is released by a hydraulic mechanism (not shown), and the attachment 20 is loaded on the support portion 42 of the exchange table 40. The ram 5 rises and retreats (FIG. 2).

  Next, the exchange table 40 loaded with the attachment 20 is moved into the attachment truck 7 by a loading / unloading mechanism (not shown), and a new switching table 40 loaded with another attachment 20 is moved from the attachment truck 7 by the loading / unloading mechanism. Moved to the position.

Next, at a predetermined position, the ram 5 on which nothing is attached is slid downward in the Z-axis direction with respect to the exchange base 40 loaded with the new attachment 20 (FIG. 1).
At this time, there is no deviation in the position of the exchange base 40 with respect to the processing machine and the position of the attachment 20 with respect to the exchange base 40, and the attachment 20 can be made without dust (cutting chips, etc.) being caught between the exchange base 40 and the attachment 20. When it is not inclined, the fitting between the ram 5 and the attachment 20, that is, the replacement of the attachment 20 is normally performed (FIG. 3).

  In the above case, the positioning hole 10 of the ram 5 and the positioning protrusion of the attachment 20 are moved by sliding the ram 5 downward in the Z-axis direction with respect to the exchange table 40 (FIG. 1) on which the attachment 20 is loaded. Are fitted (FIG. 3). The attachment 20 is held on the ram 5 by a hydraulic mechanism (not shown) in the ram 5.

  The ram 5 holding the attachment 20 is raised, and the exchange base 40 (FIG. 2) on which the attachment 20 is held by the ram 5 and nothing is loaded is housed in the attachment truck 7 by a carry-in / out mechanism (not shown). As described above, the attachment 20 is exchanged normally.

  On the other hand, when the ram 5 is slid downward in the Z-axis direction with respect to the exchange table 40 (FIG. 1) on which the attachment 20 is loaded, the position of the exchange table 40 with respect to the processing machine and the attachment 20 to the exchange table 40. When the attachment 20 is tilted due to the position being slightly shifted or dust (chips or the like by processing) being sandwiched between the exchange base 40 and the attachment 20, the ram 5 and the attachment 20 are fitted. That is, there is a possibility that an abnormality may occur in the replacement of the attachment 20.

  In the above case, the positioning holes 11 of the ram 5 and the positioning projections of the attachment 20 are formed by sliding the ram 5 downward in the Z-axis direction with respect to the exchange table 40 (FIG. 1) on which the attachment 20 is loaded. Are not fitted, and the ram 5 and the attachment 20 interfere with each other.

  Since the ram 5 is slid downward in the Z-axis direction while the ram 5 and the attachment 20 interfere with each other, a force is applied to the attachment 20 downward in the Z-axis direction. The support portion 60 (FIG. 6A) of the exchange table 40 on which the attachment 20 is loaded receives a force downward from the attachment 20 in the Z-axis direction, and the coil spring 61 in the support portion 60 is shortened (FIG. 6B). Therefore, the bolt 62, the nut 63, and the attachment 20 in the support portion 60 move downward in the Z-axis direction (FIG. 4).

  The attachment 20 reaches the vicinity of the proximity sensor 80 by moving downward in the Z-axis direction. It is detected that the attachment 20 in which the proximity sensor 80 is lowered, that is, the fitting between the ram 5 and the attachment 20 is abnormal and the attachment 20 in the ram 5 is not properly assembled.

  The processing machine can detect that an abnormality has occurred in the replacement of the attachment 20 by the proximity sensor 80 and can stop the ram 5 from sliding downward in the Z-axis direction. Therefore, it is possible to prevent the exchange table 40 and the like from being damaged due to the ram 5 being lowered excessively.

  Initially, the structure of the processing machine which concerns on Example 2 of this invention is demonstrated with reference to FIG. 7 thru | or FIG. The processing machine according to the present embodiment has the same configuration as that of the first embodiment except for the number of proximity sensors and the mounting method thereof. .

  As shown in FIG. 7 to FIG. 9, a state (predetermined) loaded on the exchange table 40 so that the presence / absence of the attachment 20 in the state (predetermined assembly preparation position) loaded on the exchange table 40 can be detected. The proximity sensor 70 as the first detection means is provided so as to be positioned in the vicinity of the attachment 20 at the assembly preparation position).

  In the present embodiment, the proximity sensor 70 is fixed to the main body 50 of the exchange base 40 via a sensor bracket 90. A sensor bracket 90, which is a holding member that holds the proximity sensor 70, extends to the outside of the main body 50 substantially parallel to the main body 50 of the exchange base 40, and a base 91 that has one end attached to the main body 50, and the base 91. It extends in a right angle direction from the other end of the sensor, and has a substantially L-shape comprising a sensor attachment portion 92 to which the proximity sensor 70 is attached at one end.

  A slide hole 52 is provided in the main body 50 of the exchange base 40, and the pressing rod 100 is installed so as to pass through the slide hole 52 and be sandwiched between the sensor bracket 90 and the attachment 20. A nut 101 is provided at one end (the lower side in FIGS. 7 to 9) of the pressing rod 100, and the other end (the upper side in FIGS. 7 to 9) is attached to the attachment 20. It is made to contact | abut with the lower surface 32 of. That is, the pressing rod 100 is a transmission member that transmits the movement of the ram 5 and the attachment 20 in a state of interfering with the sensor bracket 90.

  Next, attachment replacement in the processing machine according to Embodiment 2 of the present invention will be described with reference to FIGS.

  In addition, about the normal time in the operation | movement which removes the attachment 20, and the operation | movement which attaches the attachment 20, since it is the same as that of Example 1, the description is abbreviate | omitted.

  When the ram 5 is slid downward in the Z-axis direction with respect to the exchange table 40 (FIG. 7) loaded with the attachment 20, the position of the exchange table 40 with respect to the processing machine and the position of the attachment 20 with respect to the exchange table 40 are changed. If the attachment 20 is tilted due to a slight deviation, or dust (chips or the like by processing) is sandwiched between the exchange table 40 and the attachment 20, there is a possibility that an abnormality may occur in the replacement of the attachment 20. .

  In the above case, the positioning hole 11 of the ram 5 and the positioning protrusion 31 of the attachment 20 are fitted to each other by sliding the ram 5 downward in the Z-axis direction with respect to the exchange table 40 on which the attachment 20 is loaded. The ram 5 and the attachment 20 interfere with each other.

  Since the ram 5 is slid downward in the Z-axis direction while the ram 5 and the attachment 20 interfere with each other, a force is applied to the attachment 20 downward in the Z-axis direction. The support portion 60 (FIG. 6A) of the exchange table 40 on which the attachment 20 is loaded receives a force downward from the attachment 20 in the Z-axis direction, and the coil spring 61 in the support portion 60 is shortened (FIG. 6B). Therefore, the bolt 62, the nut 63, and the attachment 20 in the support part 60 move downward in the Z-axis direction.

  Since one end of the pressing rod 100 is provided so as to abut against the lower surface 32 of the attachment 20 (FIGS. 7 and 8), the attachment 20 is located on the lower side in the Z-axis direction (a position lower than a predetermined assembly preparation position). The pressing rod 100 is pushed downward in the Z-axis direction. Since the other end side of the pressing rod 100 is coupled to the base portion 91 of the sensor bracket 90, when the pressing rod 100 is pressed downward in the Z-axis direction, the base portion 91 of the sensor bracket 90 has a Z-axis direction. A downward force is applied.

  The sensor bracket 90 is deformed when the base portion 91 is pressed by the pressing rod 100, and the side where the base portion 91 is connected to the pressing rod 100 from the vicinity of the connecting portion with the main body portion 50 (sensor mounting portion) is the Z-axis direction. It is deformed so as to rotate downward (FIG. 9).

  Therefore, the sensor mounting portion 92 of the sensor bracket 90 is rotated in the direction away from the attachment 20 around the vicinity of the joint portion of the base portion 91 with the main body portion 50. That is, the proximity sensor 70 attached to the sensor attachment portion 92 moves away from the attachment 20 and the attachment 20 cannot be detected.

  In this embodiment, the sensor bracket 90 and the pressing rod 100 are provided as the moving means of the proximity sensor 70 and the sensor bracket 90 is deformed. However, the present invention is not limited to this. For example, the proximity sensor 70 may be moved away from the attachment 20 without deforming the sensor bracket 90.

  It is detected that the proximity sensor 70 cannot detect the attachment 20, that is, an abnormality has occurred in the fitting between the ram 5 and the attachment 20, and the attachment 20 in the ram 5 has not been properly assembled.

  That is, when the proximity sensor 70 moves and no longer detects the attachment 20, it is detected that the attachment 20 has fallen below a predetermined assembly preparation position. In this embodiment, the pressure bar 100, the sensor The bracket 90 and the like constitute second detection means.

  The processing machine detects that an abnormality has occurred in the replacement of the attachment 20 by the proximity sensor 70 moving and no longer detecting the attachment 20, and stops the sliding of the ram 5 downward in the Z-axis direction. Can do. Therefore, it is possible to prevent the exchange table 40 and the like from being damaged due to the ram 5 being lowered excessively.

1 Bed 2 Column 3 Cross rail 4 Saddle 5 Ram 6 Spindle 7 Attachment track 10 Bottom surface of the ram (attachment mounting surface)
11 Mounting hole 20 in ram Attachment 30 Upper surface of attachment (ram mounting surface)
31 Mounting projection 32 on attachment 32 Lower surface 40 on attachment Exchange base 50 Main body 60 on exchange base Supporting portion 61 on exchange base Coil spring 62 Bolt 63 Nut 70 Proximity sensor 80 Proximity sensor 90 Sensor bracket 91 Sensor bracket base 92 Sensor bracket base Sensor mounting portion 100 Press rod 101 Press rod nut

Claims (5)

A ram that rotatably supports the main shaft, and a loading device that can support an exchangeable body that can be assembled to the ram at a predetermined assembly preparation position, the exchangeable body at the predetermined assembly preparation position. In the processing machine in which the ram is moved in the assembling direction, and the ram and the exchanged object are assembled.
The loading device is provided with a support portion that is displaceable in the assembly direction of the ram and the exchanged object,
When the ram and the object to be exchanged interfere with each other in the assembly direction of the ram, the support portion is displaced to allow the movement of the ram and the object to be exchanged. Machine.   The loading device detects a first detection means for detecting that the member to be exchanged is at the predetermined assembly preparation position, and detects that the member to be exchanged has been moved from the predetermined assembly preparation position. The processing machine according to claim 1, further comprising a second detection unit. As the first detection means, a detector capable of detecting the presence or absence of the exchanged object at the predetermined assembly preparation position is provided,
As the second detection means, a position where the presence or absence of the exchanged object cannot be detected at the predetermined assembly preparation position as the exchanged object moves from the predetermined assembly preparation position. The processing machine according to claim 2, further comprising a moving means for moving to a position. As the moving means,
A holding member that holds the detector, and a transmission member that transmits the movement of the ram and the exchanged body in an interfered state to the holding member;
The processing machine according to claim 3, wherein the holding member is deformed or moved by the transmission member. As the first detection means, a detector capable of detecting the presence or absence of the exchanged object at the predetermined assembly preparation position is provided,
The detector different from the detector capable of detecting the presence or absence of the exchanged object at a position that can be moved from the predetermined assembly preparation position is provided as the second detection means. 2. The processing machine according to 2.

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