JP6429645B2 - Cutting machine - Google Patents

Description

  The present invention relates to a cutting machine for cutting a rod-shaped material into a predetermined length. More specifically, the present invention relates to a cutting machine including a detachable transmission device capable of intermittently transmitting the reciprocating motion on the lifting drive side to the movable blade side.

  In order to manufacture a forged product (forged product) that is a metal part, first of all, from a bar-shaped material (for example, a circular steel bar material with a circular cross section and a bar-shaped material, hereinafter referred to as a bar material) It is necessary to cut out the volume corresponding to the required amount for each part. In other words, it is necessary to cut and take out a required length called billet (metal piece, steel piece) from the bar. There are various methods for removing the material. One of the methods is a press-type cutting commonly called shear shear.

  As one of machines for cutting such billets, there is known a cutting machine that moves a movable blade forward and backward relative to a fixed blade. For example, a technique related to a cutting machine in which a high-hardness seat piece is embedded in each of an elevator board and a fixed board and a base end of a cutting blade is supported on the high-hardness seat piece is known (see, for example, Patent Document 1). . In addition, a technique related to an electric shearing machine provided with a slider that reciprocates in the horizontal direction by an air cylinder is known instead of the clutch mechanism installed in the conventional electric shearing machine (for example, Patent Document 2). reference). Furthermore, as a mechanism for intermittently driving the slider up and down by the movable blade, the head body of the swing head is supported by the lower end portion of the slider so that it can be suspended and tilted by holding the swing shaft. There is also known a technique related to a bar cutting machine provided with a retracting mechanism that biases the pressure surface of the swinging head in the direction of retracting from the lifting track of the movable blade when the power of the swing drive source is cut off ( For example, see Patent Document 3).

Japanese Utility Model Publication No. 38-16492 Japanese Utility Model Publication No. 48-17784 Japanese Patent No. 5339515

  However, in the techniques described in Patent Documents 1 and 2, the rotation position of the crankshaft and the eccentric cam is not detected. Therefore, an automatic bar feeding device, a billet carry-out device and the like are attached, and the bar is continuously cut. There has been a problem that it is difficult to achieve automation. In the technique of Patent Document 2, since the slider is pivotally connected to the rod of the air cylinder by a pivot member, the guide, the slider, the cylinder, etc. must be attached to the lower surface of the ram that moves up and down. At the same time, it is necessary to provide the inside of the machine body, and it is difficult to perform assembly / adjustment work, maintenance work, etc., and the cylinder also moves up and down.

  Furthermore, the technique described in Patent Document 3 can automate bar cutting. However, the rod cutting machine of this technology rotates the oscillating head to the effective phase (hanging position) where the lifting and lowering of the slider acts on the movable blade and the invalid phase (tilting position) where it does not work. If the angular position of the head is slightly shifted, the swinging head will repel and detach, causing a problem in transmitting the slider lift to the movable blade side, which may make it difficult to perform reliable cutting work. There was a point. This bar cutting machine also has a configuration in which a swing drive source, a universal joint, a shaft, and the like are attached to the lower part of the slider.

  On the other hand, in the cutting machine, it is desired to increase the cutting speed of the movable blade, and also in the cutting machine aiming at high speed, the development of a cutting machine capable of achieving high accuracy and high reliability is demanded. In other words, a mechanism that intermittently transmits the reciprocating motion of the lifting / lowering direction of the lifting / lowering slider to the movable blade side in order to perform continuous reliable cutting work, with a simple configuration, high transmission operation reliability, and There is a demand for the development of a cutting machine that facilitates operations such as assembly and maintenance.

The present invention has been made to solve the above-described problems, and achieves the following object.
An object of the present invention is to provide a cutting machine equipped with a transmission device that can intermittently transmit the reciprocating motion in the lifting direction on the lifting drive side to the movable blade side and that can be reliably engaged and disengaged. It is in.

  Another object of the present invention is to provide a cutting machine in which the main part of the detachable transmission device is provided outside the cutting machine body so that operations such as assembly, adjustment, and maintenance can be easily performed. .

In order to achieve the above object, the present invention employs the following means.
The cutting machine of the present invention 1
A fixed blade (31) provided in the cutting machine body;
A movable blade (32) movable relative to the fixed blade to cut the bar;
An elevating slider (12) provided in the cutting machine main body so as to be movable in the elevating direction;
A cutting machine comprising a lifting drive (10) for reciprocating the lifting slider (12) in the lifting direction,
A transmission portion (23) provided at a lower portion of the elevating slider (12) ;
Provided, said second position not abutting the transmission unit (23) and the first position and the transfer portion capable of contacting (23) between the elevating slider (12) and said movable blade (32) A movable member (22) capable of transmitting the downward movement of the elevating slider (12) to the movable blade (32) when in the first position;
A transmission device (20) having an engaging / disengaging drive body (20A) for moving the member to be transmitted (22) forward and backward;
The transmitted member (22) and the transmitting portion (23) are formed in a stepped contact portion in which opposing contact portions have two or more steps and are positioned at the first position. The step contact portion of the member (22) and the step contact portion of the transmission portion (23) are configured to contact each other.

The cutting machine of the present invention 2
A fixed blade provided in the cutting machine main body, a movable blade movable with respect to the fixed blade in order to cut the bar, a lifting slider provided in the cutting machine main body so as to be movable in the lifting direction, A cutting machine including an elevating drive device for reciprocating the elevating slider in the elevating direction, and provided between a transmission portion provided at a lower portion of the elevating slider, and the elevating slider and the movable blade. A member that is movable back and forth between a first position that can contact the transmission section and a second position that does not contact the transmission section; A transmission device having a transmitted member capable of transmitting the movement to the movable blade, and an engagement / disengagement drive body for moving the received member forward and backward, a driven engagement portion of the transmitted member; The engaging portion of the engagement / disengagement drive body refers to the ascending Movable in the direction, and is characterized in that those engaged in the direction of the forward and backward movement.

The cutting machine of the present invention 3
A fixed blade provided in the cutting machine main body, a movable blade movable with respect to the fixed blade in order to cut the bar material, and a lifting slider provided in the cutting machine main body so as to be movable in the lifting direction;
A cutting machine comprising an elevating drive device for reciprocating said elevating slider to the lifting direction, provided between the transmission portion provided in the lower portion of the elevation slider, and the elevation slider and the movable blade A member that is capable of moving back and forth between a first position that can contact the transmission portion and a second position that does not contact the transmission portion, and is in the first position, A transmission device having a transmitted member capable of transmitting a downward movement to the movable blade and an engagement / disengagement drive body for moving the received member forward and backward; a driven engagement portion of the transmitted member; The engaging portion of the engagement / disengagement drive body is one that is movable in the ascending / descending direction and is engaged in the forward / backward moving direction, and the transmitted member and the transmitting portion face each other. The contact part is formed in a stepped contact part with two or more steps. Are, when positioned in the first position, wherein said is a stepped abutment stepped abutting portion and the transmission portion of the transmission member being configured to abut one another.

The cutting machine of the present invention 4 is the present invention 2 or 3,
The driven engagement portion is a T-groove in which a groove having a T-shape or a substantially T-shape in plan view extends in the ascending / descending direction, and the engagement portion is formed in a T-shape that fits into the T-groove. It is a region.

The cutting machine of the present invention 5 is the present invention 1 to 4,
The engagement / disengagement drive body is selected from a fluid pressure cylinder in which the piston rod moves forward and backward by the supply of pressure fluid, an electric cylinder in which the rod moves forward and backward by the drive of the servo motor, and a feed drive body by the servo motor and ball screw mechanism It is characterized by being one kind.

The cutting machine of the present invention 6 is the present invention 5,
The engagement / disengagement fluid pressure cylinder is provided with a stopper that relaxes and positions the load applied when the piston rod moves to the first position or the second position. It is characterized by.

The cutting machine of the present invention 7 is the invention 1 to 6,
A base for fixing the fixed blade; and a lifting ram provided so as to be movable in the lifting direction with respect to the base and to which the movable blade is attached; and between the base and the lifting ram Is provided with a ram push-up device for pushing up the elevating ram with respect to the base.

The cutting machine of the present invention 8 is the present invention 7,
The ram push-up device is provided at a plurality of positions so as to surround the movable blade, and the ram push-up fluid pressure cylinder pushes up the lift ram when supplied with pressure fluid, or the lift using the elastic force. It is a ram push-up bullet device that pushes up a ram.

The cutting machine of the present invention 9 is the present invention 8,
The ram push-up fluid pressure cylinder or the ram push-up elastic device is provided at a plurality of positions on the outer side of the elevating ram.

The cutting machine of the present invention 10 is the invention 1 to 9,
The elevating drive device includes an eccentric mechanism for converting the rotational movement of the elevating drive body into the reciprocating movement of the elevating slider in the elevating direction, and the rotation of the elevating drive body is transmitted via the eccentric mechanism. A revolving motion of the elevating slider in the elevating direction, a rotation angle position detector (51) capable of detecting the rotation angle position of the eccentric shaft body (13) constituting the eccentric mechanism, and a preset desired A control device that controls the engagement / disengagement drive body to move the member to be transmitted to the first position or the second position when the eccentric shaft body is positioned at the rotation angle position. It is characterized by.

The cutting machine of the present invention 11 is the invention 1 to 10,
The cutting of the bar by the movable blade is performed in a predetermined range in the vicinity of the lowermost point of the reciprocating motion of the elevating slider.

The cutting machine of the present invention 12 is the invention 1 to 11,
The cutting of the bar by the movable blade is started when the speed of the movable blade is in the range of 0.4 m / s to 1.5 m / s.

  The cutting machine according to the present invention causes the transmission device capable of intermittently transmitting the reciprocating motion on the lifting drive side to the movable blade side, and the forward and backward movement of the detachable transmission part, the transmitted member, and the transmitted member. High reliability of the transmission operation can be achieved by adopting a simple configuration including the engagement / disengagement drive body and making the pressure receiving area of the contact portion where the transmission portion and the transmitted member contact each other appropriate.

  Moreover, even if this cutting machine rotates the raising / lowering drive body of a raising / lowering drive apparatus with high rotation speed, it disengages the transmission part of a transmission apparatus and a to-be-transmitted member, and it is 1 once every several times. By transmitting intermittently as in the case of rotation, it can be reliably transmitted to the movable blade side, and the blade speed of the movable blade can be increased. Moreover, since this cutting machine can perform cutting at a blade speed higher than the conventional blade speed (for example, 0.4 m / s or more), the cutting accuracy can be improved. Further, by performing such high-speed cutting, cutting can be performed using high-speed brittleness, so that it is possible to cut materials that have been difficult to cut with conventional cutting machines.

  Further, in this cutting machine, since the transmitted member is engaged with the engagement / disengagement drive body so as to be movable in the up-and-down direction, the transmitted member can also be moved down in accordance with the downward movement of the lifting slider. It has become. For this reason, this cutting machine is configured so that an engagement / disengagement drive body for moving the transmitted / retracted member forward and backward can be provided on the outside of the cutting machine main body, which facilitates assembly, adjustment, maintenance, and the like. Can be done. Furthermore, since this cutting machine is configured such that the engagement / disengagement drive body does not move up and down, safety can be improved.

  Further, in this cutting machine, the member to be transmitted and the structure in which the stepped contact portion is formed in the transmission portion is constituted by the member to be transmitted and the transmission portion not having the stepped contact portion. Compared with the present invention, the engagement / disengagement drive body may have less travel stroke, so the travel time can be shortened and further high-speed cutting can be performed. Further, the engagement / disengagement drive body can be reduced in size.

FIG. 1 is a front view showing an embodiment of a cutting machine according to the present invention. FIG. 2A is a diagram for explaining a detachable transmission device provided in the cutting machine according to the present embodiment, in which a member to be transmitted is disengaged (separated) from the transmission portion. FIG. 2B is a partial view of the state, and FIG. 2B is an arrow view of FIG. 2A from the direction A, and shows the engagement relationship between the engagement / disengagement driving body and the transmitted member. 2 (c) is a partial view showing a section of FIG. 2 (a) by cutting along a line BB. FIG. 3 is a view for explaining the detachable transmission device provided in the cutting machine of the present embodiment, and is a partial view in a state where the transmission portion and the transmitted member are engaged. FIG. 4 is a partial view showing a partial section in order to show the relationship between the fixed blade and the movable blade in the cutting machine. FIG. 5 is an explanatory diagram schematically showing a lifting drive device, a transmission device, a ram push-up device, and a control device. FIG. 6 is an operation chart for explaining the relationship between the lifting slider, the movable blade, and the transmission device in this cutting machine.

Hereinafter, embodiments of a cutting machine of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an embodiment of a cutting machine according to the present invention. FIG. 2A is a view for explaining a transmission device for detachable lifting motion provided in this cutting machine, and is a partial view of a state in which a member to be transmitted is detached from the transmission portion. . 2 (b) is an arrow view of FIG. 2 (a) as viewed from the direction A, showing the engagement relationship between the engagement / disengagement drive body and the transmitted member, and FIG. 2 (c) FIG. 3 is a partial view showing a cross section of a part of FIG. FIG. 3 is a view for explaining the detachable transmission device provided in the cutting machine, and is a partial view showing a state in which the transmission part of the up-and-down movement and the transmitted member are engaged. FIG. 4 is a partial view showing a partial cross-section for explaining the relationship between the fixed blade and the movable blade in this cutting machine. FIG. 5 is an explanatory diagram schematically showing a lifting drive device, a transmission device, a ram push-up device, and a control device. FIG. 6 is an operation chart for explaining the relationship between the lifting slider, the movable blade, and the transmission device in this cutting machine.

The configuration of the cutting machine 1 will be described with reference to FIGS. The cutting machine 1 includes a cutting machine main body 5, an elevating drive device 10, an engagement / disengagement transmission device 20, a fixed blade 31, a material cutting mechanism 30 having a movable blade 32, a ram push-up device 40, and the like.
The cutting machine main body 5 is provided with a lifting slider 12 that is guided by guides 5a and 5a formed in the cutting machine main body 5 so as to be movable in the lifting direction (the arrow Y direction shown in FIGS. 2 and 3). The elevating slider 12 is a member having a frame shape when viewed from the front, and has a rectangular space. A horizontal slider 14 is provided in the space so as to be movable in the horizontal direction. The horizontal slider 14 is guided by the guide portions 12a and 12a and moves in the horizontal direction (the arrow X direction in FIGS. 2 and 3). The horizontal slider 14 is formed with a hole 12b. The eccentric shaft portion 13b of the eccentric shaft body 13 is fitted into the hole portion 12b. The eccentric shaft body 13 has a support shaft portion 13a rotatably supported on the cutting machine body 5 via a bearing portion (not shown). The center c2 of the eccentric shaft portion 13b is formed to be eccentric by the amount of eccentricity e with respect to the center c1 of the support shaft portion 13a.

  The lifting drive device 10 will be described with reference to FIG. One pulley 16 is provided on the output shaft of the motor 15 which is a lifting drive. One of the support shaft portions 13 a of the eccentric shaft body 13 is provided with the other pulley 17. A belt 18 is stretched between one pulley 16 and the other pulley (see FIG. 5). When the eccentric shaft body 13 is rotated via the motor 15, the one pulley 16, the belt 18, and the other pulley 17, the eccentric shaft body 13 rotates around the center c1 of the support shaft portion 13a. At this time, the center c2 of the eccentric shaft portion 13b performs an eccentric rotational movement with an eccentricity amount e around the center c1. Therefore, the horizontal slider 14 moves in the horizontal direction (the arrow X direction shown in FIGS. 2 and 3).

  Further, the lift slider 12 moves in the lift direction (the arrow Y direction shown in FIGS. 2 and 3). In other words, the lifting slider 12 performs a reciprocating motion in the lifting direction (hereinafter referred to as lifting motion) corresponding to the rotation angle position of the eccentric shaft body 13 via the horizontal slider 14. A motor (elevating drive body) 15, belt / pulley mechanisms 16 to 18, an eccentric shaft body 13, a horizontal slider 14, etc. constitute an elevating drive apparatus 10 that elevates the elevating slider 12. In the description of this embodiment, the belt / pulley mechanism is used. However, any mechanism that can transmit the rotation of the motor 15 to the eccentric shaft body 13 may be used. For example, a gear mechanism, a sprocket / chain mechanism, etc. It may be.

  A rotation angle position detector (for example, an absolute encoder) 51 is provided on the other side of the support shaft portion 13 a of the eccentric shaft body 13 in order to detect the rotation angle position of the eccentric shaft body 13. The rotation angle position detector 51 is connected to the control unit 52 of the control device 50 via a connection cable, and the output signal output from the rotation angle detector 51 is input to the control unit 52 of the control device 50 (FIG. 5). reference). Based on the angle information from the rotation angle detector 51, the control unit 52 outputs an ON / OFF signal (on / off signal) when positioned at a desired angular position preset in the control unit 52. Such a technique is described in, for example, Japanese Patent Publication No. 7-40205, and detailed description thereof is omitted in this description.

  The cutting machine main body 5 is provided with a transmission device 20 for raising and lowering movements that can be engaged and disengaged in order to selectively and intermittently transmit the raising and lowering movement of the raising and lowering slider 12 to a movable blade 32 described later. The transmission device 20 is a transmission member 23 that is a transmission portion attached to the lower surface of the elevating slider 12, and can be engaged with and disengaged from the transmission member 23. And an engagement / disengagement fluid that is an engagement / disengagement drive body that moves the transmitted member 22 forward and backward to a forward position (engagement position) that is a first position and a reverse position (non-engagement position) that is a second position. It is composed of a pressure cylinder (hereinafter referred to as an engagement / disengagement cylinder) 20A and the like.

  A lower surface of the elevating slider 12 is provided with a transmission member (transmission portion) 23 that constitutes one side of the elevating motion transmission device 20 and a part constituting the fixed side of the engagement / disengagement operation. In this embodiment, the transmission member 23 is attached to the elevating slider 12 with a bolt (not shown). The engagement / disengagement cylinder 20 </ b> A is configured such that the piston rod 25 is switched by switching the supply direction of the pressure fluid (for example, compressed air) that is a working fluid pressurized to a predetermined pressure supplied from the pressure source 55 by the direction switching valve 29. Move forward and backward. That is, in the engagement / disengagement cylinder 20A, when the solenoid 29a of the direction switching valve 29 is excited, the piston rod 25 moves to the retracted position, and when the solenoid 29b of the direction switching valve 29 is excited, the piston rod 25 moves to the forward position (FIG. 5).

  The transmission member 23 is a member in which a step-like contact portion 23a having a plurality of steps (for example, two steps) formed on the lower surface is formed. The member 22 to be transmitted is a member that constitutes the other side of the transmission device 20 of the up-and-down movement and constitutes the movable side of the engaging / disengaging operation. The transmitted member 22 has a stepped contact portion 22c having a plurality of steps (for example, two steps) formed on the upper surface. When the transmitted member 22 is positioned at the forward position where the transmitted member 22 is engaged with the transmitting member 23 by the engagement / disengagement cylinder 20A, the stepped contact portion 22c of the transmitted member 22 and the stepped contact portion 23a of the transmitted member 23 are in contact with each other. It can come into contact and engage. When the transmitted member 22 is positioned at the retracted position by the engagement / disengagement cylinder 20A, the stepped contact portion 22c of the transmitted member 22 and the stepped contact portion 23a of the transmitted member 23 are separated by a predetermined dimension d. , Do not engage (see FIG. 2).

  The step contact portion 22c and the step contact portion 23a have a pressure receiving area that does not cause a problem in transmitting from the transmission member 23 side of the elevating slider 12 to the movable blade 32 side via the transmitted member 22. Is formed. The transmitting member 22 and the transmitted member 23 are easy to form a pressure receiving area because the shape of the abutting portion is rectangular in plan view. Even when the number of steps is three or more, there is no problem if the pressure receiving areas in plan view are the same or substantially the same. Further, since the stepped contact portion 22c and the stepped contact portion 23a have such a pressure receiving area, when the transmitted member 23 is positioned at the forward movement position, there is a slight error in the positioning. Even if this occurs, it is always configured to ensure reliable transmission.

  Thus, the transmitted member 22 in which the stepped contact portion 22c is formed, and the transmitted member 23 in which the stepped contact portion 23a is formed include the transmitted member having no stepped contact portion, Compared to the one constituted by the transmission member (transmission part), the movement stroke of the engagement / disengagement cylinder 20A may be small, so that the movement time can be shortened and further high-speed cutting can be performed. Further, since the moving stroke of the engagement / disengagement cylinder 20A can be shortened, the engagement / disengagement cylinder 20A can be downsized.

  The engagement / disengagement cylinder 20A is provided with a cylinder body 21 including a head cover 21a, a rod cover 21b, a cylinder tube 21c, a tie rod 21d, a nut 21e, and the like, and a piston (not shown) that slides on the inner peripheral portion of the cylinder tube 21c. The piston rod 25 is formed (see FIGS. 2 and 3). A cylinder mounting member 24 is fixed to the side surface of the cutting machine body 5 with bolts 24a. The cylinder body 21 is fixed to the cylinder mounting member 24 with bolts 24b.

  On one end side of the piston rod 25, a T-shaped engagement portion 25a in plan view is formed. The engaging portion 25a engages with a T-shaped groove portion 22a having a T-shape in plan view, which is a driven engaging portion formed on the other end side of the transmitted member 22 (FIG. 2B). reference). The transmitted member 22 and the piston rod 25 are relatively moved in the ascending / descending direction while maintaining the engaged state in the direction in which the piston rod 25 moves forward / backward between the forward movement position and the backward movement position (axial direction of the piston rod). It is configured to be movable. A screw portion is formed on the other end side of the piston rod 25, and a nut 28 is screwed in and fixed by a set screw (not shown). In the description of this embodiment, the shapes of the engaging portion and the driven engaging portion are described as being T-shaped, but the present invention is not limited to this. The engaging portion and the driven engaging portion can maintain the engaged state of the engaging portion and the driven engaging portion in the advancing / retreating direction even when the piston rod rapidly moves back and forth, and in the ascending / descending direction. Needless to say, it may be of a shape that allows relative movement. For example, the engagement portion may be cylindrical and the driven engagement portion may be a cylindrical hole, the engagement portion may be a plan view type, the drive engagement portion may be a groove, and the like. .

  A forward side stopper 27 is attached to an end face on one side of the nut 28 with a bolt 28a. The advance side stopper 27 is a member made of hard rubber, and is a member for relieving a load applied when the piston rod 25 moves to the advance position side and performs positioning. A retreat-side stopper 26 is attached to an end face on one side of the cylinder body 21 with a bolt (not shown). The retreat-side stopper 26 is a member made of hard rubber, and is a member for relieving a load applied when the piston rod 25 is moved to the retreat position side and positioned.

  In this cutting machine 1, the transmitted member 22 is engaged with the piston rod 25 of the engagement / disengagement cylinder 20 </ b> A so as to be movable in the up-and-down direction. Can also move down. Since it is configured in this manner, the engagement / disengagement cylinder 20A for moving the transmitted member 22 forward and backward can be provided outside the cutting machine main body 5, and can be used for assembly / adjustment, maintenance, etc. Work can be performed easily and workability is improved.

Below the transmission member 23, a lifting ram 38 having a circular shape in plan view is provided. In the center of the cutting machine body 5, a ram guide member 39 is fixed by a bolt 39a. The ram guide member 39 is a member that guides and supports the outer peripheral surface 38a of the elevating ram 38 so that the elevating ram 38 can move in the elevating direction.
A T-groove 38 b having a T-shape in side view is formed on the upper surface of the elevating ram 38. The T-groove portion 38b is for guiding the guide portions 22b and 22b formed on both side surfaces of the transmitted member 22 (see FIG. 2C). In other words, in the transmitted member 22, the guide portions 22b and 22b are guided by the T-groove portion 38b which is a T-shaped guide portion of the elevating ram 38, and the axial direction of the piston rod 25 (the piston rod 25 is moved to the forward position). It is possible to move in the forward / backward direction).

The relationship among the elevating slider 12, the transmission member 23, the transmitted member 22, and the engagement / disengagement cylinder 20A will be described with reference to FIGS.
FIG. 2 shows a state where the transmitted member 22 is located at the retracted position. When the eccentric shaft body 13 is rotating, the elevating slider 12 reciprocates in the elevating direction between the center c2 at the uppermost point and the center c2 ′ at the lowermost point. In FIG. 2, the state in which the elevating slider 12 is located at the upper solstice point is indicated by a solid line, and the state at which it is located at the lower solstice point is indicated by a two-dot chain line. When the transmitted member 22 is in the retracted position, the transmitting member 23 and the transmitted member 22 are separated by a predetermined dimension d and do not come into contact with each other even if the elevating slider 12 is positioned at the lowermost point. The reciprocating motion of the lifting slider 12 is not transmitted to the lifting ram 38 side. In this state, the cutting machine 1 is in a so-called idle driving state.

  FIG. 3 shows a state in which the transmitted member 22 is located at the forward movement position. The lift slider 12 reciprocates in the lift direction between the center c2 'at the uppermost point and the center c2 at the lowermost point when the eccentric shaft body 13 is rotating. In FIG. 2, the state in which the elevating slider 12 is positioned at the upper solstice is indicated by a two-dot chain line, and the state at which it is positioned at the lower solstice is indicated by a solid line.

  When the transmitted member 22 is located at the forward movement position, the stepped contact portion 23a of the transmission member 23 and the stepped contact portion 22c of the transmitted member 22 are moved when the elevating slider 12 moves to the lower end point side. Abut. The elevating slider 12 moves the member to be transmitted 22, the elevating ram 38, and the like by moving them downwardly against the pushing force by push-up cylinders 40A, 40B, and 40C described later. The movement of the elevating ram 38 is transmitted to the movable blade mounting member 34 and the movable blade 32, and cutting by the movable blade 32 is performed.

  As shown in FIG. 4, a movable blade mounting member 34 is fixed below the elevating ram 38. A movable blade 32 is fixed to the movable blade mounting member 34. A base 37 is provided on the lower side of the cutting machine body 5. A fixed blade 31 is provided on the base 37. The base 37 is provided with a guide portion for guiding the rod-shaped material B. The material B is inserted into the guide portion of the base 37 until it comes into contact with the material stopper 33 by a material feeding device (not shown). The material B in contact with the material stopper 33 is cut by a shearing force acting between the fixed blade 31 and the movable blade 32 when the movable blade 32 moves downward. The cut material is carried out of the cutting machine 1 by the carry-out chute 35.

  Between the base 37 and the raising / lowering ram 38, the ram raising apparatus 40 which always pushes up the raising / lowering ram 38 to the raising side is provided. In this embodiment, the ram push-up device 40 includes ram push-up fluid pressure cylinders (hereinafter referred to as push-up cylinders) 40A, 40B, and 40C. A plurality of push-up cylinders 40A, 40B, and 40C are provided so as to surround the elevating ram 38 (in this embodiment, one on the front side and two on the rear side). The push-up cylinders 40A, 40B, and 40C are provided outside the elevating ram 38 to facilitate work such as maintenance.

  A cylinder mounting member 45 is fixed to the front side of the base 37 (left side in FIG. 4) with a bolt 45a (see FIGS. 1 and 4). The cylinder body 41 of the push-up cylinder 40A is fixed to the cylinder mounting member 45 with bolts (not shown). A piston 42 is inserted into the cylinder chamber 41 b of the cylinder body 41. A seal member (for example, wear ring, packing) 41a is provided between the cylinder body 41 and the piston 42, and seals the cylinder chamber 41b.

  A stay member 44 is fixed to the movable blade mounting member 34 with a bolt 44a. The piston 42 is supplied with a pressure fluid (for example, compressed air), which is a working fluid pressurized to a predetermined pressure, to the cylinder chamber 41b, so that the movable blade mounting member 34 and the lifting ram are connected via the stay member 44. 38 is always pushed upward. That is, the pressure fluid supplied from the pressure source 55 is always supplied to the push-up cylinders 40A, 40B, and 40C via the direction switching valve 49. When stopping the supply of the pressure fluid, the solenoid 49a is excited to switch the supply direction. A ram side stopper 36 is provided on the upper surface of the movable blade mounting member 34, and when the ram side stopper 36 contacts the lower surface of the ram guide member 39, the lifting ram 38, the movable blade mounting member 34, etc. A position on the ascending side (upper end position) in the direction is determined.

  On the rear side of the base 37 (the right side in FIG. 4), push-up cylinders 40B and 40C are provided at positions symmetrical with respect to the front (see FIGS. 1 and 4). The push-up cylinders 40B and 40C are fixed to the base 37 with bolts 41c and 41c. The pistons 42 of the push-up cylinders 40B and 40C always push the plate 46 fixed to the movable blade mounting member 34 upward. In other words, the movable blade mounting member 34 and the elevating ram 38 are always pushed upward by the push-up cylinders 40A, 40B, 40C working together. Note that the push-up cylinders 40A, 40B, and 40C differ only in the structure of the mounting portion that is attached to the base 37 and the like, and the internal structure as the cylinder is the same. Therefore, in the description of this embodiment, the push-up cylinders 40B, 40C Description of the internal structure of is omitted.

  The cutting operation in this cutting machine will be described with reference to FIG. In the description of this embodiment, for convenience of explanation, the rotation angle position at which the elevating slider 12 is located at the uppermost point is assumed to be 0 °, and the rotation angle position at which the lower slider 12 is located at the lowermost point is assumed to be 180 °. I do. In this description, for the sake of explanation, the cutting operation and the blanking operation are alternately performed.

  The motor 15 of the elevating drive device 10 rotates the eccentric shaft body 13 at a predetermined rotational speed (for example, 100 to 140 rpm). By the rotation of the eccentric shaft body 13, the elevating slider 12 repeats reciprocating motion that moves up and down between the upper and lower points. That is, the elevating slider 12 moves downward from the rotation angle position 0 °, which is the upper solstice point, to the rotation angle position 180 °, which is the lower solstice point. The reciprocating motion that moves up to the rotational angle position 360 ° (0 °)] is repeated.

  Description will be made from a state in which the elevating slider 12 is at the uppermost point (0 ° position). In this state, the elevating ram 38 and the like are pushed up by the push-up cylinders 40 </ b> A, 40 </ b> B, and 40 </ b> C, and the ram side stopper 36 is in contact with the lower surface of the ram guide member 39. Therefore, the lower surface of the transmission member (transmission part) 23 and the upper surface of the elevating ram 38 are separated by a predetermined distance.

  When the control unit 52 determines that the output signal from the rotational position detector 51 has reached a predetermined rotation angle position (for example, 90 ° position) preset in the control unit 52 from the top point (0 ° position), The controller 52 excites the solenoid 29b of the direction switching valve 29 and demagnetizes the solenoid 29a to move the piston rod 25 of the engagement / disengagement cylinder 20A to the forward position. When the piston rod 25 is in the forward position, the stepped contact portion (lower surface) 23a of the transmission member 23 and the stepped contact portion (upper surface) 22c of the transmitted member 22 can be engaged. When the elevating slider 12 moves downward, the stepped contact portion 23a of the transmission member 23 and the stepped contact portion 22c of the transmitted member 22 come into contact with each other, and the downward movement of the lifting slider 12 moves toward the lifting ram 38 and the movable blade 32 side. Is transmitted to. At this time, the member to be transmitted 22 moves downward integrally with the lifting slider 12. Further, the elevating slider 12 presses against the push-up force of the push-up cylinders 40A, 40B, 40C, and pushes down the piston 42 from the extended position to the reduced position. That is, the movable blade 32 moves downward from the upper end position at which the ram side stopper 36 is in contact with the ram guide member 39 to the lower end point. At this time, the movable blade 32 cuts the material B in cooperation with the fixed blade 31. In other words, the movable blade 32 and the fixed blade 31 are a predetermined range in the vicinity of the lower point when the movable blade 32 moves from the upper end position to the lower point (for example, from a position 10 mm before the lower point). Cutting is started when moving to a position 1.0 mm before the lower solstice point.

  After the lower solstice point (180 ° position), the elevating slider 12 moves upward to the upper solstice side. When the elevating slider 12 is raised, the elevating ram 38, the movable blade 32, and the like are pushed up by the pushing force of the push-up cylinders 40A, 40B, 40C, and move to the upper end position where the ram side stopper 36 contacts the ram guide member 39. The elevating slider 12 further moves upward, and the stepped contact portion 23 a of the transmission member 23 and the stepped contact portion 22 c of the transmitted member 22 are separated from each other. When the control unit 52 determines that a predetermined rotation angle position (for example, a 270 ° position) set in advance has been reached, the control unit 52 excites the solenoid 29a of the direction switching valve 29 and demagnetizes the solenoid 29b, thereby engaging and disengaging cylinders. The 20A piston rod 25 is moved to the retracted position.

  When the cutting operation is not performed, since the piston rod 25 and the transmitted member 22 are in the retracted position, the transmitting member 23 and the transmitted member 22 are not engaged. Therefore, although the elevating slider 12 performs a reciprocating motion in the elevating direction, the reciprocating motion is not transmitted to the elevating ram 38 and the movable blade 32 side. Therefore. The movable blade 32 maintains the state positioned at the upper end position by the action of the push-up force of the push-up cylinders 40A, 40B, and 40C.

  Since this cutting machine 1 performs cutting at a high cutting speed, if continuous cutting that completely matches the lifting movement of the lifting slider 12 is performed, the feeding speed is not in time in relation to the feeding operation of the material B, etc. The cutting length dimension may become unstable. In that case, as shown in FIG. 6, it is preferable to perform intermittent cutting in which the cutting operation and the blanking operation are alternately repeated. Moreover, you may make it operate | move so that multiple cutting | disconnection operation | movement, one idle driving | running operation, 1 cutting | disconnection operation | movement, and multiple idle driving | operations may be performed.

  This cutting machine 1 is a transmission device in which a transmission member 23 and a transmitted member 22 for intermittently transmitting the reciprocating motion of the lifting slider 12 driven by the lifting drive device 10 to the movable blade 32 side can be engaged and disengaged. 20 has a simple configuration including the transmission member 23, the transmission member 22, and the engagement / disengagement cylinder 20A, and the pressure receiving area of the portion where the transmission member 23 and the transmission member 22 abut can be made appropriate. Therefore, high reliability of the transmission operation can be achieved.

  Moreover, even if this cutting machine 1 rotates the eccentric shaft body 13 at a high rotational speed by the motor 15 of the elevating drive device 10, the transmission member 23 and the transmitted member 22 of the transmission device 20 are engaged and disengaged. It can be transmitted intermittently, such as once every multiple times. Thus, since this cutting machine 1 can transmit the reciprocating motion of the raising / lowering slider 12 to the movable blade 32 side reliably, the cutter speed of the movable blade 32 can be increased. Moreover, since this cutting machine 1 can perform cutting at a blade speed higher than the conventional blade speed (for example, 0.4 m / s or more), the cutting accuracy can be improved. Furthermore, since the cutting machine 1 can perform cutting using high-speed brittleness by performing such high-speed cutting, the cutting machine 1 can perform cutting of materials that have been difficult to cut with conventional cutting machines.

  As mentioned above, although embodiment of this invention was described, it cannot be overemphasized that this invention is not limited to this embodiment. For example, the transmission part and the member to be transmitted may be formed with a planar contact part. In this case, the transmitted member may be a rectangular parallelepiped or a substantially rectangular parallelepiped. Moreover, the site | part integrally formed in the raising / lowering slider may be sufficient as a transmission part. Furthermore, the ram push-up device may be a ram push-up elastic device that pushes up the lifting ram using a spring force such as a coil spring or raw rubber. The engagement / disengagement drive body is a drive body that moves forward and backward using a servo motor [for example, an electric cylinder (also referred to as an electric actuator, servo cylinder, etc.) in which a rod moves forward / backward by driving the servo motor, a servo motor and a screw Or a feed driver driven by a mechanism or a ball screw mechanism]. Furthermore, the engagement / disengagement drive body may be configured to move the transmitted member forward and backward by a cam mechanism.

DESCRIPTION OF SYMBOLS 1 ... Cutting machine 5 ... Cutting machine main body 10 ... Elevating drive apparatus 12 ... Elevating slider 13 ... Eccentric shaft body 14 ... Horizontal slider 15 ... Motor (elevating drive body)
20 ... Transmission device 20A ... Engaging / disengaging fluid pressure cylinder
DESCRIPTION OF SYMBOLS 21 ... Cylinder main body 22 ... Transmitted member 22c ... Step contact part 23 ... Transmission part 23a ... Step contact part 25 ... Piston rod 26 ... Retraction side stopper 27 ... Advance side stopper 30 ... Material cutting mechanism 31 ... Fixed blade 32 ... Movable blade 33 ... Material stopper 34 ... Movable blade mounting member 36 ... Ram side stopper 38 ... Elevating ram 39 ... Ram guide member 40 ... Ram push-up devices 40A, 40B, 40C ... Ram push-up fluid pressure cylinder 41 ... Cylinder body 42 ... Piston rod 50 ... Control device 51 ... Rotation position detector 52 ... Control unit

Claims (12)

A fixed blade (31) provided in the cutting machine body;
A movable blade (32) movable relative to the fixed blade to cut the bar;
An elevating slider (12) provided in the cutting machine main body so as to be movable in the elevating direction;
A cutting machine comprising a lifting drive (10) for reciprocating the lifting slider (12) in the lifting direction,
A transmission portion (23) provided at a lower portion of the elevating slider (12) ;
Provided, said second position not abutting the transmission unit (23) and the first position and the transfer portion capable of contacting (23) between the elevating slider (12) and said movable blade (32) A movable member (22) capable of transmitting the downward movement of the elevating slider (12) to the movable blade (32) when in the first position;
A transmission device (20) having an engaging / disengaging drive body (20A) for moving the member to be transmitted (22) forward and backward;
The transmitted member (22) and the transmitting portion (23) are formed in a stepped contact portion in which opposing contact portions have two or more steps and are positioned at the first position. A cutting machine, wherein the stepped contact portion of the member (22) and the stepped contact portion of the transmission portion (23) are in contact with each other. A fixed blade provided in the cutting machine body;
A movable blade movable with respect to the fixed blade to cut the bar;
An elevating slider provided on the cutting machine main body so as to be movable in the elevating direction;
A cutting machine comprising a lifting drive for reciprocating the lifting slider in the lifting direction,
A transmission portion provided at a lower portion of the elevating slider;
The elevating slider and provided between the movable blade, a member that can move back and forth and a second position not abutting the transmission portion and the first position capable of contacting with the transmitting unit, the When in the first position, a transmitted member capable of transmitting the downward movement of the elevating slider to the movable blade;
A transmission device having an engagement / disengagement drive body for moving the member to be advanced / retracted,
The driven engagement portion (22c) of the transmitted member and the engagement portion (25a) of the engagement / disengagement driving body are engaged in the moving direction and moving in the forward / backward direction. A cutting machine characterized by that. A fixed blade provided in the cutting machine body;
A movable blade movable with respect to the fixed blade to cut the bar;
An elevating slider provided on the cutting machine main body so as to be movable in the elevating direction;
A cutting machine comprising a lifting drive for reciprocating the lifting slider in the lifting direction,
A transmission portion provided at a lower portion of the elevating slider;
The elevating slider and provided between the movable blade, a member that can move back and forth and a second position not abutting the transmission portion and the first position capable of contacting with the transmitting unit, the When in the first position, a transmitted member capable of transmitting the downward movement of the elevating slider to the movable blade;
A transmission device having an engagement / disengagement drive body for moving the member to be advanced / retracted,
The driven engagement portion of the transmitted member and the engagement portion of the engagement / disengagement drive body are engaged with each other so as to be movable in the up-and-down direction and in the forward / backward movement direction,
The transmitted member and the transmitting portion are formed in a stepped contact portion having two or more steps in contact with each other, and the stepped contact of the transmitted member is located at the first position. The cutting machine is configured such that the portion and the stepped contact portion of the transmission portion contact each other. The cutting machine according to claim 2 or 3,
The driven engagement portion (22a) is a T-groove in which a groove having a T-shape or a substantially T-shape in plan view extends in the ascending / descending direction, and the engagement portion (25a) is fitted into the T-groove. A cutting machine characterized in that it is a part formed in a letter shape. In the cutting machine according to any one of claims 1 to 4,
The engagement / disengagement drive body is selected from a fluid pressure cylinder in which the piston rod moves forward and backward by the supply of pressure fluid, an electric cylinder in which the rod moves forward and backward by the drive of the servo motor, and a feed drive body by the servo motor and ball screw mechanism Cutting machine characterized by being one type The cutting machine according to claim 5, wherein
The fluid pressure cylinder is provided with a stopper for relieving a load applied when the piston rod moves to the first position or the second position, and for positioning. Cutting machine to do. The cutting machine according to any one of claims 1 to 6,
A base for fixing the fixed blade;
An elevating ram that is movably provided in the elevating direction with respect to the base and to which the movable blade is attached;
A cutting machine, wherein a ram push-up device (40) is provided between the base and the elevating ram to push up the elevating ram with respect to the base. The cutting machine according to claim 7,
The ram push-up device is provided at a plurality of positions so as to surround the movable blade, and the ram push-up fluid pressure cylinder pushes up the lift ram when supplied with pressure fluid, or the lift using the elastic force. A cutting machine characterized by being a ram lifting device that pushes up a ram. The cutting machine according to claim 8,
The ram push-up fluid pressure cylinder or the ram push-up elastic device is provided at a plurality of positions on the outer side of the elevating ram. In the cutting machine according to any one of claims 1 to 9,
The elevating drive device includes an eccentric mechanism for converting the rotational movement of the elevating drive body into the reciprocating movement of the elevating slider in the elevating direction, and the rotation of the elevating drive body is transmitted via the eccentric mechanism. Reciprocating the elevating slider in the elevating direction,
When the eccentric shaft body is positioned at a rotation angle position detector (51) capable of detecting the rotation angle position of the eccentric shaft body (13) constituting the eccentric mechanism and a preset desired rotation angle position, A cutting machine comprising: a control device that controls the engagement / disengagement drive body to move the transmitted member to the first position or the second position. The cutting machine according to claim 10, wherein
The cutting machine characterized in that the cutting of the bar by the movable blade is performed within a predetermined range in the vicinity of the lowermost point of the reciprocating motion of the elevating slider. The cutting machine according to any one of claims 1 to 11,
The cutting machine is characterized in that the cutting of the bar by the movable blade is performed in a range where the speed of the movable blade is 0.4 m / s to 1.5 m / s.

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