WO2010064432A1

WO2010064432A1 - Press machine

Info

Publication number: WO2010064432A1
Application number: PCT/JP2009/006582
Authority: WO
Inventors: 長江正行
Original assignee: 村田機械株式会社
Priority date: 2008-12-04
Filing date: 2009-12-03
Publication date: 2010-06-10
Also published as: JP5218563B2; CN102216064A; CN102216064B; JPWO2010064432A1

Abstract

A press machine, wherein, without additional cost and without complexity of the configuration of the press machine, a frame is prevented from being deformed by heat created by the drive source of a press drive mechanism. A press drive mechanism (8) is provided with a ram lifting mechanism section (8a) for lifting and lowering a ram (7) by converting the motion of a longitudinally advancing and retracting member (25) of an upper horizontal frame section (1b) of a press frame (1) into vertical motion, and also with a drive source unit (29) having a drive source (33) for advancing and retracting the advancing and retracting member (25). A bridge member (35) is bridged between both left and right side sections (1ba, 1bb) of the upper horizontal frame section (1b), a support member (37) is provided at a position near the center of the bridge member (35) relative to the left-right direction, and a drive source unit (29) is supported by the support member (37).

Description

Press machine

Related applications

This application claims priority of Japanese Patent Application No. 2008-309208 filed on Dec. 4, 2008 and Japanese Patent Application No. 2009-053073 filed on Mar. 6, 2009, which is incorporated herein by reference in its entirety. Cited as what constitutes

The present invention relates to a press machine such as a punch press that raises and lowers a ram by a press drive mechanism.

A punch press having a configuration in which a press frame having a C-shaped side surface is provided and a ram is moved up and down by a press drive mechanism mounted on an upper horizontal frame portion of the press frame is widely known (for example, Patent Documents 1 and 2). Conventionally, in this type of punch press, as shown in the partially broken plan view of FIG. 13, the servo motor 33 that is the drive source of the press drive mechanism 8 is attached to the left and right sides of the upper horizontal frame portion 1b. .

Japanese Patent No. 3467868 JP-A-11-000799

However, when the servo motor 33 is attached to the left and right side portions of the upper horizontal frame portion 1b, the heat generated by the servo motor 33 is directly transmitted to the side portion 1bb on the drive source attachment side. A temperature difference occurs between 1ba and 1bb, and the upper horizontal frame portion 1b is deformed to the left and right as shown by the chain line in FIG. As a result, the upper tool and the lower tool are misaligned, resulting in problems such as a reduction in machining quality and a shortened tool life. In FIG. 13, the bending of the upper horizontal frame portion 1b is shown extremely, but the actual bending is very slight.

One method for preventing the temperature difference between the left and right side portions 1ba and 1bb is to provide a heat source cooling means such as an oil cooler on the side portion 1ba on the drive source mounting side (Patent Document 2). However, this method has a problem in that the cost increases because a heat source cooling means must be provided separately. As another countermeasure, there is a method in which the drive source unit consisting of the drive source alone or the drive source and the speed reducer is divided into two, and the respective parts are individually attached to the left and right side portions 1ba and 1bb of the upper horizontal frame portion 1b. . However, this method also increases the cost because the configuration is complicated.

An object of the present invention is to provide a press machine that can prevent deformation of a frame due to heat generated in a drive source of a press drive mechanism without cost and without complicating the configuration.
Another object of the present invention is to provide a simple structure of a motion conversion mechanism for converting the operation of the drive source unit into the advance / retreat operation of the advance / retreat member, and to arrange the drive source units in a balanced manner.
Still another object of the present invention is to position the advancing / retreating member at the center of the left and right sides of the upper horizontal frame portion so as to balance the support of the advancing / retreating member and to make the support member as close to the left / right center as possible or to the left / right center as much as possible. Is to position.
Still another object of the present invention is to transmit the heat generated by the drive source unit substantially in half to the left and right sides of the upper horizontal frame portion.

The press machine according to the present invention is a press machine having a press frame on which a press drive mechanism is mounted. The press frame extends in a horizontal direction along the floor, and above the lower horizontal frame part. There are an upper horizontal frame portion extending in the same direction as the lower horizontal frame portion, and a column portion that vertically connects at least one end of the lower horizontal frame portion and the upper horizontal frame portion. The press drive mechanism has a ram lifting / lowering mechanism that moves the ram up and down by converting the movement of the advancing / retreating member that moves back and forth in the longitudinal direction of the upper horizontal frame part into a vertical movement, and a drive source that moves the advancing / retreating member forward and backward. A drive source unit. A bridge member is provided on both the left and right sides of the upper horizontal frame portion, a support member is provided in the vicinity of the center of the bridge member, and the drive source unit is supported by the support member. Here, the vicinity of the left and right center is the center of the left and right or the vicinity thereof.

According to the configuration of the present invention, the heat generated in the drive source unit is transmitted from the support member to the left and right sides of the upper horizontal frame portion through the installation member. Since the support member is provided near the center of the left and right of the installation member, the difference between the amount of heat transmitted to the left side of the upper horizontal frame portion and the amount of heat transmitted to the right side of the upper horizontal frame portion is small. Therefore, a temperature difference does not occur between the left and right side portions, and deformation such as the upper horizontal frame portion bending left and right can be prevented. Compared to the conventional press machine, only the support structure of the drive source unit is changed, and it is not necessary to provide a separate device such as a cooling means, so that the cost is not increased. Further, since the drive source unit itself can be used as it is, the configuration is not complicated.

In this invention, when the drive source unit is composed of a servo motor and a speed reducer, the output shaft is oriented along the left-right direction, and the support member is supported at the position of the speed reducer, and the servo motor is moved to the upper horizontal frame. It is preferable that the opening provided in either of the left and right side portions of the portion is disposed so as to penetrate therethrough.
If the output shaft of the drive source unit is along the left-right direction, the motion conversion mechanism that converts the rotation of the output shaft into the advance / retreat of the advance / retreat member can be a simple configuration such as an eccentric cam mechanism. Since the speed reducer is closer to the motion conversion mechanism than the servo motor, by supporting the drive source unit on the support member at the speed reducer, the motion conversion mechanism can be moved to the left and right sides of the upper horizontal frame. The support member can be provided in the vicinity of the left and right center when positioned at the center in the left and right direction. In that case, it is possible to avoid the servo motor from interfering with the upper horizontal frame portion by arranging the servo motor through the openings provided in either of the left and right sides of the upper horizontal frame portion. Thereby, a drive source unit can be arrange | positioned with sufficient balance.

In this invention, it is preferable that the advance / retreat member is positioned at the center between the left and right sides of the upper horizontal frame portion, and the support member is positioned adjacent to the side of the advance / retreat member.
By positioning the advancing / retracting member at the center of the left and right of the upper horizontal frame portion, the advancing / retreating member can be supported with a good balance between left and right, and the occurrence of uneven distortion of the upper horizontal frame portion is avoided. Moreover, a support member can be provided in the vicinity of the left-right center by positioning a support member adjacent to the side of an advance / retreat member.

In this invention, it is more preferable that the advancing / retreating member is positioned at the center of the left and right sides of the upper horizontal frame portion and the support member is positioned at the same position in the left / right direction as the advancing / retreating member. The support member is provided with a relief opening into which a part of the drive source unit and a part of the advance / retreat member enter.
By positioning the advancing / retracting member at the center of the left and right of the upper horizontal frame portion, the advancing / retreating member can be supported with a good balance between left and right, and the occurrence of uneven distortion of the upper horizontal frame portion is avoided. Moreover, a support member can be provided in the left-right center by positioning a support member in the left-right direction same position as an advance / retreat member. If the support member is provided in the center of the left and right, the heat generated in the drive source unit is generated in the left and right sides of the upper horizontal frame by making the erection member symmetrical with the joint with the support member as the center line of symmetry. It is transmitted evenly to both sides. By providing the relief opening in the support member, the support member can be provided in the left and right center between the left and right side portions of the upper frame portion without interfering with the advancing and retreating members.

In this invention, the installation member includes a left half part from a contact point with the support member to a contact point with the left side part of the upper horizontal frame part, and a right side part of the upper horizontal frame part from the contact point with the support member. It is preferable that the right half to the contact point has almost the same heat transfer ratio. The heat transfer ratio here is not the thermal conductivity per the same cross-sectional area, but the amount of heat transfer on the left side of the erection member and the amount of heat transfer on the right side of the erection member when heat is generated in the drive source unit. It is a ratio.
If the heat transfer ratio between the left half and the right half of the erection member is approximately the same, the heat generated by the drive source unit is transmitted almost halfway to the left and right sides of the upper horizontal frame, and between these left and right sides. No temperature difference.

The present invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are for illustration and description only and should not be used to define the scope of the present invention. The scope of the invention is defined by the appended claims. In the accompanying drawings, the same reference numerals in a plurality of drawings indicate the same or corresponding parts.
It is a top view which shows schematic structure of the press machine concerning 1st Embodiment of this invention. It is a side view which shows schematic structure of the press machine. (A), (B) is a side view which shows each different state of the press drive mechanism of the press machine. It is a top view of the press drive mechanism. FIG. 5 is a VV cross-sectional view of FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 4. It is a top view of the press drive mechanism of the press machine concerning 2nd Embodiment of this invention. FIG. 8 is a sectional view taken along line VIII-VIII in FIG. It is a perspective view which shows the support structure of the drive source unit of the press machine. It is a perspective view of the housing of the reduction gear of the drive source unit. It is a perspective view of the support member of the support structure of the drive source unit. It is a mechanism figure of a different press drive mechanism. It is explanatory drawing which shows the deformation | transformation of a press frame.

A first embodiment of the present invention will be described with reference to FIGS. The press machine of this embodiment is a punch press, FIG. 1 is a plan view showing a schematic configuration thereof, and FIG. 2 is a side view thereof. This punch press includes a press frame 1 having a C-shape in a side view. Specifically, the press frame 1 includes a lower horizontal frame portion 1a that extends horizontally along the floor, and an upper horizontal frame portion 1b that is above the lower horizontal frame portion 1a and extends in the same direction as the lower horizontal frame portion 1a. The lower horizontal frame portion 1a and the upper horizontal frame portion 1b are composed of a column portion 1c that vertically connects one end of the lower horizontal frame portion 1a. The upper horizontal frame portion 1b is cantilevered, and the lower portion of the upper horizontal frame portion 1b is a space in which

turrets

2 and 3 described later are arranged. The press frame 1 may have a square shape in which the tip of the upper horizontal frame portion 1b is connected to the lower horizontal frame portion 1a via a vertical frame portion (not shown).

The upper and

lower turrets

2 and 3 which are upper and lower tool supports are supported on the upper horizontal frame portion 1b and the lower horizontal frame portion 1a of the press frame 1 so as to be rotatable around concentric vertical axes. On these

turrets

2 and 3, a plurality of punch tools 4 and die tools 5 are arranged side by side in the circumferential direction. The upper and

lower turrets

2 and 3 are synchronously rotated with each other by a motor (not shown) and are indexed to the machining position P.

The punch tool 4 is driven up and down by the ram 7 while being indexed to the processing position P. The ram 7 is driven up and down by a press drive mechanism 8 mounted on the upper horizontal frame portion 1b. The press drive mechanism 8 will be described later.

The plate material W is fed back and forth and left and right on the table 14 by the plate material feeding means 13 so that the processing position comes to the punch position P. The plate material feeding means 13 includes a carriage 15 that moves back and forth (Y direction) and a cross slide 16 that moves left and right (X direction), and a work holder 17 that holds an end of the plate material W is attached to the cross slide 16. It is as. A forward / backward moving mechanism 18 for moving the carriage 15 in the front / rear direction and a left / right moving mechanism 19 for moving the cross slide 16 in the left / right direction include, for example, a

servo motor

18a, 19a and a conversion mechanism such as a ball screw for converting the rotation thereof into a linear motion. 18b, 19b, etc.

As shown in FIGS. 3A and 3B to FIG. 6, the press drive mechanism 8 includes a ram lifting and lowering mechanism portion 8a located at the front portion in the upper horizontal frame portion 1b, and a drive portion 8b located at the rear portion. It becomes.
The ram lifting mechanism 8a has a crank member 21 that is rotatable around a fulcrum A along the left-right direction. The crank member 21 is substantially triangular in a side view, and the vicinity of each vertex is a fulcrum A, a force point B, and an action point C, respectively. A fulcrum shaft 22 is provided integrally with the fulcrum A, and this fulcrum shaft 22 is rotatably fitted to a bearing member 23 installed on the upper horizontal frame portion 1b. A front end of an advancing / retracting member 25 extending in the front-rear direction is connected to the force point B by a force point connecting pin 24. As shown in FIG. 5, the elevating member 27 has an opening 27a communicating in the front-rear direction, and the advancing / retreating member 25 is inserted into the opening 27a, so that the fulcrum A, the force point B, and the action point C are on the same plane. It is realized that the elevating member 27 and the advancing / retreating member 25 cross each other. The upper end of the elevating member 27 extending in the vertical direction is connected to the action point C by the action point connecting pin 26. The ram 7 is connected to the lower end of the elevating member 27 by a ram connecting pin 28.

The drive unit 8 b includes a drive source unit 29 (FIG. 4) and a motion conversion mechanism 30 that converts the rotation of the drive source unit 29 into the advance / retreat of the advance / retreat member 25. The motion conversion mechanism 30 includes an eccentric cam mechanism, and includes a disc-shaped eccentric member 31 that rotates about the rotation axis O along the left-right direction. An eccentric coupling pin 32 provided at an eccentric position of the eccentric member 31 is provided. The rear end of the advance / retreat member 25 is connected so as to be relatively rotatable. The drive source unit 29 includes a servo motor 33 and a speed reducer 34 that are drive sources. The rotation of the servo motor 33 is decelerated by the speed reducer 34 and transmitted to the eccentric member 31.

The support structure of the drive source unit 29 will be described. A pair of front and rear plate-

like installation members

35, 36 are provided on both the left and right side portions 1ba, 1bb of the upper horizontal frame portion 1b. The plate-like support members are provided between the

installation members

35, 36 in the vicinity of the left and right centers. 37 is provided, and the support member 37 supports the housing 34 a of the speed reducer 34. For example, the housing 34 a is fixed to the support member 37 by bolts 38. The advancing / retracting member 25 is located at the center between the left and right side portions 1ba, 1bb of the upper horizontal frame portion 1b, and the supporting member 37 is located adjacent to the side of the advancing / retreating member 25 (right side in this embodiment). is doing. By positioning the advancing / retracting member 25 at the center of the left and right, the advancing / retreating member 25 can be supported with a good balance between left and right, and the occurrence of uneven distortion of the upper horizontal frame portion 1b is avoided. In the drive source unit 29, the output shaft 29 a is arranged in the direction along the left-right direction, and the speed reducer 34 and the servomotor 33 extend from the support member 37 to the right side. The servo motor 33 passes through an opening 39 provided in the right side portion 1bb of the upper horizontal frame portion 1b, and the tip projects out of the upper horizontal frame portion 1b.

The

erection members

35 and 36 include the

left half portions

35L and 36L from the contact point with the support member 37 to the contact point with the left side portion 1ba of the upper horizontal frame portion 1b, and the right side of the upper horizontal frame portion 1b from the contact point with the support member 37. The

right half portions

35R and 36R up to the contact point with the portion 1bb are configured to have substantially the same heat transfer ratio. The heat transfer ratio mentioned here is not the heat conductivity per the same cross-sectional area, but the heat transfer amount of the

left side portions

35L and 36L of the

erection members

35 and 36 and the erection member 35 when heat is generated in the drive source unit 29. , 36 is a ratio to the heat transfer amount of the

right side portions

35R, 36R.

For example, in the case of the erection member 35, as shown in FIG. 6, the erection member is provided at the lower part between the left and right side portions 1ba and 1bb of the upper horizontal frame portion 1b in contact with the bottom 1bc of the upper horizontal frame portion 1b. The contact length L1 between the left half portion 35L of 35 and the left side portion 1ba of the upper horizontal frame portion 1b is the contact length L2 between the right half portion 35R of the erection member 35 and the right side portion 1bb of the upper horizontal frame portion 1b. Longer than that. The vertical width of the left half portion 35L and the right half portion 35R in the vicinity of the boundary is the same, and the vertical width L3 is shorter than the contact lengths L1 and L2. In addition, a hole 40 is formed in the right half portion 35R of the erection member 35 to reduce the cross-sectional area of the vertical cross section. Thus, by making the contact area with the side parts 1ba and 1bb of the upper horizontal frame part 1b different between the left half part 35L and the right half part 35R of the erection member 35, the sectional area of the vertical section is made different. Even if the left and right lengths from the contact point with the support member 37 to the side portions 1ba and 1bb are different, the heat transfer ratios of the left and

right half portions

35L and 35R can be made substantially the same. The erection member 36 has a similar shape.

Further, the support member 37 is provided so that the upper and lower ends thereof are in contact with the bottom 1bc and the upper portion 1bd of the upper horizontal frame portion 1b. The bottom 1dc and the top 1bd of the upper horizontal frame 1b are also located above the contact with the left half 1bcL, 1bdL from the contact with the support member 37 to the contact with the left 1ba of the upper horizontal frame 1b and the support 37. The bottom half 1bc and the right half 1bcR and 1bdR of the top 1bd also have holes 41, respectively, so that the right half 1bcR and 1bdR to the contact with the right side 1bb of the horizontal frame 1b have substantially the same heat transfer ratio. 42 is opened. The heat transfer ratio in this case is not the thermal conductivity per the same cross-sectional area, but the bottom 1dc of the upper horizontal frame 1b and the left side 1bcL, 1bdL of the upper 1bd when heat is generated in the drive source unit 29. It is the ratio between the amount of heat transfer and the amount of heat transfer of the bottom portion 1dc of the upper horizontal frame portion 1b and the right side portions 1bcR and 1bdR of the upper portion 1bd.

The operation of the above configuration will be described. When the eccentric member 31 is rotated once by the servo motor 33, the advance / retreat member 25 performs one reciprocation operation. By the advance / retreat operation of the advance / retreat member 25, the crank member 21 is swung, whereby the elevating member 27 is raised / lowered, and the ram 7 performs the punching operation and the returning operation with respect to the punch tool 4. The top dead center of the elevating member 27 is the position of FIG. 3A where the eccentric coupling pin 32 is on the opposite side of the ram lifting mechanism 8a with respect to the rotation center O, and the bottom dead center is the rotation of the eccentric coupling pin 32. 3B is located on the ram lifting mechanism 8a side with respect to the center O. FIG. Therefore, when the advance / retreat member 25 moves forward, the elevating member 27 is lowered, and when the advance / retreat member 25 is retracted, the elevating member 27 is raised. In the case of this embodiment, when the elevating member 27 is located between the top dead center and the bottom dead center, the elevating member 27 and the connecting member 25 are orthogonal to each other.

When the machining is stopped, the elevating member 27 stops at the top dead center in FIG. Since the rotation drive source of the eccentric member 31 is the servo motor 33, the elevating member 27 can be accurately stopped at the top dead center. In a state where the elevating member 27 is at the top dead center, a pulling force acts on the advancing / retreating member 25 due to the gravity of the ram 7. However, at this time, the eccentric member 31 is in a neutral position on the opposite side of the ram lifting / lowering mechanism portion 8a with respect to the rotation center O, and is not rotated by the force acting on the advance / retreat member 25. For this reason, it is possible to prevent the ram 7 from dropping when the machining is stopped without providing a separate component for preventing the ram 7 from falling.

In the press machine of this embodiment, the crank member 21 is arranged such that the action point C is arranged in the horizontal direction with respect to the fulcrum A, the force point B is arranged in the vertical direction with respect to the fulcrum A, and the advance / retreat member 25 is provided. With the configuration arranged below the fulcrum A, the advance / retreat member 25 and the drive unit 8b which is the advance / retreat drive mechanism can be installed at a relatively low position of the lower horizontal frame portion 1b. Thereby, the weight of the airframe can be reduced and the stability can be improved.

Further, the fulcrum A of the crank member 21 is located at the tip side of the action point C and above the force point B, so that the fulcrum A of the crank member 21 is provided at a position close to the tip of the upper horizontal frame 1b. it can. Thereby, attachment of the crank member 21 is easy. Further, the elevating member 27 and the advancing / retracting member 25 intersect each other in a side view so that the action point connecting pin 24 does not protrude forward from the fulcrum shaft 22 even when the advancing / retreating member 25 is most advanced. The force point B can be provided at a position close to the tip of the upper horizontal frame 1b. Thereby, the processing position P can be made closer to the front of the work space, and the workability and workability are good.

As the press operation is performed, the servo motor 33 and the speed reducer 34 of the drive unit 29 generate heat. The heat is transmitted from the support member 37 to the left and right side portions 1ba and 1bb of the upper horizontal frame portion 1b through the front and

rear installation members

35 and 36, respectively. Since the heat transfer ratios of the

left half portions

35L and 36L and the

right half portions

35R and 36R are substantially the same in the

installation members

35 and 36, there is no temperature difference between the left and right side portions 1ba and 1bb of the upper horizontal frame portion 1b. It is possible to prevent deformation such as the horizontal frame portion 1b bending left and right.

The heat generated by the servo motor 33 and the speed reducer 34 is also transmitted from the support member 37 to the bottom 1bc and the top 1bd of the upper horizontal frame 1b. Since the heat transfer ratios of the left half 1bcL and 1bdL of the bottom 1bc and the top 1bd and the right half 1bcR and 1bdR are substantially the same, the influence of the heat transmitted to the side parts 1ba and 1bc through the bottom 1bc and the top 1bd is also affected. Can be eliminated.

Further, although heat is easily transmitted upward, the

erection members

35 and 36 are provided in the lower part between the left and right side parts 1ba and 1bb of the upper horizontal frame part 1b, and therefore the bottom part 1bc and the upper part 1bd of the upper horizontal frame part 1b. There is almost no temperature difference between them, and it is possible to prevent deformation such as the upper horizontal frame portion 1b bending up and down.

Thus, it is possible to prevent the prespray 1 from being deformed by the heat of the drive source unit 29 only by changing the support structure of the drive source unit 29. Since it is not necessary to provide a separate device such as a cooling means unlike conventional measures, the cost is not increased. Moreover, since the drive source unit 29 itself can be used as it is, it does not lead to a complicated configuration.

In this embodiment, the hole 40 is provided in the right half 35R (36R) of the installation member 35 (36), but the hole 40 may not be provided. Since the erection member 35 (36) is provided near the right center between the left and right side portions 1ba and 1bb of the upper horizontal frame portion 1b, the amount of heat transmitted to the left side portion 1ba of the upper horizontal frame portion 1b and the upper horizontal frame portion 1b The difference in the amount of heat transmitted to the right side 1bb is small. Therefore, even if there is no hole 40, a temperature difference hardly occurs between the left and right side portions 1ba and 1bb.

In this embodiment, the shape of the erection member 35 (36) is devised to equalize the left and right heat transfer ratios, but other methods may be employed. For example, the plate thickness of the erection member 35 (36) may be changed on the left and right with the contact point with the support member 37 as a boundary. You may divide the material of the construction member 35 (36) into the material from which heat conductivity differs on either side. Alternatively, the left and right heat transfer ratios may be equalized by attaching separate members to the left and right side portions of the erection member 35 (36).

7 to 11 show the support structure of the drive source unit 29 of the second embodiment. In FIG. 7, the left side is the front side, and in FIG. 8, the right side is the front side. The press machine of this embodiment differs from the first embodiment in the support structure of the drive source unit 29. Since the configuration other than the support structure of the drive source unit 29 is the same as that of the first embodiment, description and illustration are omitted.

This press machine is also provided with a pair of front and rear plate-

like erection members

35, 36 provided between the left and right sides 1 ba, 1 bb of the upper horizontal frame portion 1 b, and a housing 34 a of the speed reducer 34 between these

erection members

35, 36. A support member 37 is provided so as to be bridged. In the above embodiment, the support member 37 is located near the center of the left and right, whereas in this embodiment, the support member 37 is located at the center of the left and right. That is, the support member 37 is positioned at the same position in the left-right direction as the advance / retreat member 25.

In order to prevent the advance / retreat member 25 and the support member 37 from interfering with each other, the support member 37 has a shape shown in FIG. That is, the support member 37 is a relief opening formed by a circular hole portion 37aa into which the base end 34aa of the housing 34a of the speed reducer 34 is fitted, and a notch portion 37ab connected to the circular hole portion 37aa and continuing to the installation member 35 side. 37a. Bolt holes 37b are provided on the outer periphery of the circular hole portion 37a. Further, as shown in FIG. 11, the base end 34aa of the housing 34a has a C-shape in a side view in which a notch 34ab corresponding to the notch 37ab of the escape opening 37a is formed in a part in the circumferential direction. Has been.

The speed reducer 34 is provided by fitting the base end 34aa of the housing 34a into the circular hole 37aa of the relief opening 37a of the support member 37, and is fixed to the support member 37 by a bolt 38 inserted into the bolt hole 37b. . At this time, the circumferential phase of the speed reducer 34 is a phase in which the notch 34ab of the housing 34a and the notch 37ab of the support member 37 are aligned with each other. The end of the advancing / retracting member 25 on the drive portion 8 b side is disposed in the through hole 35 a of the installation member 35 and the notches 34 ab, 37 ab, and the tip thereof is connected to the eccentric connecting pin 32 of the eccentric member 31. . That is, the escape opening 37a contains the base end 34aa of the housing 34a, which is a part of the drive source unit 29, and the end of the advance / retreat member 25 on the drive unit 8b side.

With the above configuration, the support member 37 can be provided at the center of the left and right without interfering with the advance / retreat member 25. If the support member 37 is provided at the center in the left and right directions, the

erection members

35 and 36 are formed in a symmetrical shape with the joint portion with the support member 37 as a symmetrical center line, so that the servo motor 33 and the deceleration of the drive unit 29 are reduced. The heat generated by the machine 34 is evenly transmitted from the support member 37 to the left and right side portions 1ba and 1bb of the upper horizontal frame portion 1b via the front and

rear installation members

35 and 36. Therefore, a temperature difference does not occur between the left and right side portions 1ba and 1bb of the upper horizontal frame portion 1b, and deformation such as the upper horizontal frame portion 1b bending left and right can be prevented.

Instead of configuring the support member 37 as a single member as described above, the support member 37 is configured by two individual support members (not shown) that are divided in two up and down, and the space between the two individual support members is A relief opening (not shown) through which a part of the drive source unit 29 and a part of the advance / retreat member 25 enter may be used. In some cases, the support member 37 may be composed of three or more individual support members (not shown).

FIG. 12 is a mechanism diagram of a different press drive mechanism 8. In the press drive mechanism 8, the ram lifting mechanism 8a is a toggle mechanism. The toggle mechanism 50 is formed by connecting a short upper toggle link 51 and a long lower toggle link 52 so as to be bendable by a connecting pin 53, and is bent and driven by an advancing / retracting lever 54 which is movable forward and backward in a horizontal direction. The advance / retreat lever 54 is driven forward / backward by the drive source unit 29 via the motion conversion mechanism 30 as in the above-described embodiment. The lower toggle link 52 of the toggle mechanism 50 is pin-connected to the upper end of the ram 7 at the lower end. The upper toggle link 51 is supported so as to be rotatable around the swing fulcrum O1 at the upper end.

The advancing / retracting lever 54 has a rocking lever 54b coupled to the front end side of the advancing / retreating lever main body 54a so as to be movable up and down, and the tip of the rocking lever 54b is bifurcated (not shown). It is connected to a connecting pin 53 of the mechanism 50 so as to be rotatable up and down. The vertical displacement of the bent portion accompanying the bending operation of the toggle mechanism 50 is absorbed by the vertical swing of the swing lever 54b. The rear end of the advancing / retreating lever main body 54a is connected to an eccentric connecting pin 32 provided at an eccentric position of the eccentric member 31 of the motion converting mechanism 30 via a connecting rod 55.

When the servo motor (not shown) of the drive source unit 29 is rotated, the advancing / retreating lever 54 performs a reciprocating operation of one reciprocation. During this one reciprocating operation, while the advance / retreat lever 54 reaches the center position of the advance / retreat stroke S from the right end position in FIG. 7, the toggle mechanism 50 changes from a bent state toward the right side to an extended state. Accordingly, the ram 7 is lowered from the top dead center to the bottom dead center. While the advancing / retreating lever 54 reaches the left end position from the center position of the advancing / retreating stroke S, the toggle mechanism 50 changes from the extended state to the bent state to the left, and accordingly, the ram 7 is moved from the bottom dead center. It rises to the top dead center. When the advance / retreat lever 54 returns from the left end position to the right end position, the ram 7 moves up and down as described above. In this way, the ram 7 repeats the up and down movement twice while the advance / retreat lever 54 reciprocates once.

As shown in FIG. 12, in the case where the ram lifting mechanism 8a is a press drive mechanism 8 composed of a toggle mechanism, the heat generated in the drive source unit 29 is generated by supporting the drive source unit 29 in the same manner as in the above embodiments. The upper horizontal frame portion can be prevented from being deformed by being uniformly transmitted to the left and right side portions of the upper horizontal frame portion (not shown). Further, the left and right heat transfer ratios may be equalized by other methods.

In each of the above embodiments, the press machine is a punch press, but the present invention can also be applied to a press machine other than the punch press, for example, generally a molding machine.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily assume various changes and modifications within the obvious scope by looking at the present specification. Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.

DESCRIPTION OF SYMBOLS 1 ... Press frame 1a ... Lower horizontal frame part 1b ... Upper horizontal frame part 1c ... Column part 7 ... Ram 8 ... Press drive mechanism 8a ... Ram raising / lowering mechanism part 8b ... Drive part 25 ... Advance / retreat member 29 ... Drive source unit 29a ... Output Shaft 30 ... Motion conversion mechanism 33 ... Servo motor 34 ...

Reducers

35, 36 ...

Installation members

35L, 36L ...

Left half

35R, 36R ... Right half 37 ... Support member 37a ... Relief opening 39 ...

Openings

40, 41, 42 ... hole

Claims

A press machine having a press frame on which a press drive mechanism is mounted,
The press frame includes a lower horizontal frame portion that extends horizontally along the floor, an upper horizontal frame portion that is above the lower horizontal frame portion and extends in the same direction as the lower horizontal frame portion, the lower horizontal frame portion, and It consists of a column part that connects at least one end of the upper horizontal frame part up and down,
The press drive mechanism has a ram lifting / lowering mechanism that moves the ram up and down by converting the movement of the advancing / retreating member that moves back and forth in the longitudinal direction of the upper horizontal frame part into a vertical movement, and a drive source that moves the advancing / retreating member forward and backward. A drive source unit,
A press machine in which a construction member is provided on both the left and right sides of the upper horizontal frame portion, a support member is provided in the vicinity of the left and right center of the construction member, and the drive source unit is supported by the support member.
The drive source unit is composed of a servo motor and a speed reducer, the output shaft is oriented along the left-right direction, and the support member is supported at the position of the speed reducer, and the servo motor is supported on both left and right sides of the upper horizontal frame portion. The press machine according to claim 1, wherein the press machine is disposed so as to penetrate an opening provided in any one of the above.
2. The press machine according to claim 1, wherein the advance / retreat member is located at a center between right and left sides of the upper horizontal frame portion, and the support member is located adjacent to a side of the advance / retreat member.
The advancing / retracting member is located at the center between the left and right sides of the upper horizontal frame portion, and the support member is located at the same position in the left / right direction as the advancing / retreating member. The press machine according to claim 1, wherein a relief opening into which a part of the advance / retreat member enters is provided.
The erection member includes a left half part from a contact point with the support member to a contact point with the left side part of the upper horizontal frame part, and a contact point between the contact with the support member and a right side part of the upper horizontal frame part. The press machine according to claim 1, wherein the right half has substantially the same heat transfer ratio.