JPH04129525U - Moving bolster braking device - Google Patents

Abstract

(57) [Summary] [Purpose] Irrespective of the weight of the moving bolster,
A moving bolster brake device capable of stopping at a predetermined position within a press machine and at a mold exchange position. [Structure] The moving bolster 2 includes a drive unit 8 consisting of wheels 4 connected by an axle 3, a motor 9, a speed reducer 10, etc.
It is equipped with and can be self-propelled. An ammeter 16 is connected to the motor 9 to detect the load at startup as a current value. This ammeter 16
Calculating means 17 is connected to calculate the current value detected by the ammeter 16 into a braking force corresponding to the weight of the bolster 2. The output of the calculation means 17 is input to the current control means 18. A current control means 18 is connected to the brake means 14 attached to the motor 9, and a power source 15 is connected to the brake means 14 via the current control means 18.
The brake force is controlled according to the weight by sending current from the brake. In this way, the moving bolster brake device 1 is configured.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a braking device for a moving bolster. It can be used when traveling between the press work position and the mold exchange position in the press machine. Ru.

0002

[Background technology]

The moving bolster is pressed to replace the mold attached to its upper part. It travels between the press work position and the mold exchange position within the machine. Movies like this The following are common ways to stop the backing bolster in place. be. In other words, the first method is to equip the moving bolster with a general-purpose motor with a brake. If you want to stop the bolster in the specified position after it has been installed, use the stop button as shown in Figure 3. Apply braking to the moving bolster drive system before the stop position, that is, at the braking start position A. and stop the moving bolster after time TB. Then switch the motor Move the moving bolster while turning it from 0N to 0FF in small steps until it reaches the stop position B. It is stopped.

0003 In addition, the second method uses a speed control unit for the driving motor of the moving bolster. etc., and as a result, as shown in Figure 4, a moving bolster for high-speed running can be installed. At the braking start position A, the brakes are applied once to bring the vehicle into a state of low speed running. From there, stop The bolster is running at low speed until station B.

0004

[Problem that the idea aims to solve]

However, in order to stop the moving bolster at a predetermined position, the motor The position to start braking is determined based on the assumption that the weight of the moving bolster is at its heaviest. It is normal to be discouraged For this reason, in both the first and second methods, due to the weight of the bolster, as shown in FIGS. There is a difference in braking (deceleration) time TB.

[0005] That is, in the first method, when the weight of the moving bolster is light, the bolt Since the inertia of the bolster also decreases, the bolster stops immediately after braking begins. Two Therefore, the deceleration time TB becomes shorter. Therefore, from the stopped position to the stopped position B, The distance becomes longer and the motor's 0N-0FF running time becomes longer. Therefore, movie The low-speed running time of the backing bolster will be longer, and it will take more time to change the mold. This also has a negative impact on the entire press working process.

[0006] Also, in the second method, the weight of the bolster is light, similar to the first method described above. In this case, the braking time TB becomes short and the bolster immediately shifts to low-speed driving. the Therefore, the distance from the stopped position to the stopped position B becomes longer, and therefore, the distance from the stopped position to the stopped position B becomes longer. The time is getting longer and it takes longer for the bolster to run. In this way, the second method However, since it takes time to change the mold, the entire pressing process is is also having a negative impact.

[0007] Here, the purpose of this invention is to make the moving bolster suitable for press machines regardless of its weight. A moving machine that can be moved to a predetermined position between the machine and the mold exchange position in approximately constant time. Bing Bolster brake equipment is available.

[0008]

[Means to solve the problem]

This invention consists of a moving bolster drive unit and a brake hand that brakes this drive unit. a brake force control means for controlling the braking force of the brake means; and a brake force control means for controlling the brake force of the brake means; A weight detection means for detecting the weight of the supporting bolster, and a weight detection means for detecting the weight of the The weight is calculated to calculate the braking force required when braking the moving bolster, and and a calculation means for transmitting the calculation result to the brake force control means. This constitutes a braking device for the bolster.

[0009] In addition, the braking means includes a bonding force of magnetic powder generated by energizing the coil. It is preferable to use an electromagnetic powder clutch that provides a braking force of .

[Effect]

In this invention, the weight is reduced when the moving bolster is moved by the drive unit. The weight is detected by the detection means, and based on the detected weight, the calculation means calculates, Calculate the braking force required when braking the moving bolster. The calculated braking force is transmitted to the braking force control means, and the braking means The brake force is controlled by the brake force control means.

0010 In this way, the braking force is applied to the braking means according to the weight of the moving bolster. Since the braking time is constant regardless of the weight of the moving bolster, low-speed driving is possible. time becomes shorter. As a result, if the weight of the moving bolster is light, The time required for changing molds can be shortened, and the entire pressing process can be reduced. This achieves the above objective without having any adverse effect on.

[0011] Also, if an electromagnetic powder clutch is used as a braking means, the Since the binding force of the magnetic powder is generated immediately, the torque build-up time is quick and the This provides quick response.

0012

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 1 shows an overall configuration diagram of a braking device 1 for a moving bolster according to the present embodiment. It is shown. According to the figure, the moving bolster 2 is connected to the axle 3. It is possible to run on rails 5 via wheels 4 in a direction perpendicular to the plane of the paper. Also, the voltage A mold 6 corresponding to a predetermined press work is appropriately attached on the star 2.

[0013] A motor 9 and a motor 9 are attached to the moving bolster 2 via a bracket 7. A speed machine 10 is provided. A drive gear 12 is attached to the drive shaft 11 of this reducer 10. This driving gear 12 meshes with a driven gear 13 mounted on the axle 3. There is. Here, a motor 9, a reducer 10, a drive shaft 11, a drive gear 12 and a driven A driving section 8 of the moving bolster 2 is configured by the gear 13, and the driving section 8 includes the gear 13. Therefore, the moving bolster 2 is capable of self-propelled movement.

[0014] The motor 9 is provided with a brake means 14 for stopping the motor 9. Ru. This braking means 14 is, for example, one that can convert the braking force by current control. It uses magnetic powder called powder, and when it is energized by electricity, An electromagnetic powder brake is used, which transmits torque through the bonding force of magnetic powder. Ru. This brake means 14 is provided with a current control means 18 as a brake force control means. and power supply 15 is connected.

[0015] An ammeter 16 is used in the motor 9 as a weight detection means. This electric The current meter 16 detects the current value at the time of starting the motor 9, and uses the current value to The weight of Bolster 2 is being detected.

[0016] A calculation means 17 is connected to the ammeter 16. As this calculation means 17, A computer (microcomputer) is used, and this calculating means 17 uses an ammeter 16. The current value sent from the The brake force is calculated based on the weight of the vehicle.

[0017] The output of the calculation means 17 is input to the current control means 18. This current control hand A variable resistor or the like is used as the stage 18, and the brake calculated by the calculation means 17 is The brake means 14 is controlled according to the key force.

[0018] Next, the operation of this embodiment will be explained. FIG. 2 is a flow chart showing the procedure for stopping the moving bolster 2 at a predetermined position. It is a chart. According to the figure, the bolster 2 connects the inside of the press machine and the die exchange position. When moving, the motor 9 is activated in step 21 and acceleration of the motor 9 is started. If so, the current value of the motor 9 is detected by the ammeter 16 in step 22. detected The calculated current value is calculated by the calculation means 17 in step 23 to calculate the current value when braking the moving bolster 2. The required braking force is calculated according to the weight of the bolster 2.

[0019] In step 24, after the motor 9 has finished accelerating, the moving bolster 2 is driven for a certain period of time. In other words, steady operation of the motor 9 is performed. The steady operation of this motor 9 is for a predetermined period of time. After the time has elapsed, in step 25, the braking (deceleration) start position is set in advance at an unillustrated position. It is determined whether there is a deceleration signal from the outside by a detection sensor or the like.

[0020] If it is determined in step 25 that the deceleration signal is not being output, return to step 24 and Steady operation of the meter 9 is performed. If the deceleration signal was issued in step 25, the step In step 26, the braking means 14 is applied based on the braking force calculated in step 23. The motor 9 starts decelerating.

[0021] In step 27, it is determined whether a predetermined time has elapsed after the motor 9 started decelerating. It will be done. If the predetermined time has not elapsed (N0), return to step 26 and restart the motor. Continue deceleration in step 9, but if the predetermined time has elapsed (YES), in step 28 The motor 9 starts running at low speed. In step 29, the pre-installed It is determined whether there is a stop signal from outside using a position detection sensor, etc. (not shown). It will be done.

[0022] If it is determined in step 29 that a stop signal has not been issued, return to step 28, Continue running motor 9 at low speed. If the stop signal was given in step 29, the step At step 30, the drive of the motor 9 is stopped and the moving bolster 2 is moved to the specified position. The movement is completed and stopped.

[0023] According to this embodiment as described above, there are the following effects. That is, the weight of the moving bolster 2 including the mold is detected by the ammeter 16, and Bolster 2 is stopped at a predetermined position with a braking force commensurate with the weight of the bolt. Regardless of the weight of Star 2, the braking time of Bolster 2 is constant, and the Bolster When the weight of the vehicle 2 is light, the time for running at low speed is shortened. As a result, mold replacement The time is shortened and, in turn, the entire pressing process is shortened.

[0024] Furthermore, in this embodiment, an electromagnetic powder brake is used as the braking means 14. In this electromagnetic powder brake, magnetic powder is combined with electricity and acts as a braking force. Therefore, the torque build-up is quick, and therefore, the moving bolster 2 It has the effect of being able to stop at a predetermined position extremely accurately.

[0025] Note that the present invention is not limited to the above-mentioned embodiments, and may be modified as shown below. etc. That is, in the embodiment described above, the ammeter 16 is used as the weight detection means, and the current meter 16 is used as the weight detection means. The current meter 16 is connected to the motor 9 to detect the load as a current value, but this In addition to this, you can also attach a load cell etc. directly to the moving bolster 2 to detect its weight. You may. Furthermore, the weight of the mold etc. should be measured in advance using another measuring means, or is the weight of the mold when it is lifted up by a crane and attached to the moving bolster 2. may be detected by a crane and the weight detected by these may be input into the calculation means 17. stomach. In short, it is sufficient as long as it is possible to detect the weight of the moving bolster 2. The grade doesn't matter.

[0026] In addition, the specific structure, shape, etc. when implementing the present invention will achieve the purpose of the present invention. Other structures may be used as long as they can be achieved.

[0027]

[Effect of the idea]

As explained above, according to the moving bolster braking device of the present invention, , regardless of its weight, move the moving bolster between the press machine and the die change position. It can be moved and stopped at a fixed position in a substantially fixed time.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a moving bolster braking device according to an embodiment of the present invention.

FIG. 2 is a flow chart showing the operating procedure of the brake device.

FIG. 3 is a diagram showing the relationship between traveling speed and stopping time according to an example of a conventional moving bolster braking device.

FIG. 4 is a diagram showing the relationship between traveling speed and stopping time according to another example of a conventional moving bolster braking device.

[Explanation of symbols]

1 Brake device of moving bolster 2 Moving bolster 8 Drive section 9 Motor 10 Reducer 14 Electromagnetic powder brake (braking means) 15 Power supply 16 Ammeter (weight detection means) 17 Calculation means 18 Current control means (brake force control means)

Claims (2)

[Scope of utility model registration request] 1. A moving bolster driving section, a braking means for braking the driving section, a braking force control means for controlling the braking force of the braking means, and a weight detecting means for detecting the weight of the moving bolster. A moving bolster comprising a calculation means for calculating the weight detected by the weight detection means into a braking force required for braking the moving bolster and transmitting the calculation result to the braking force control means. Brake device. 2. The braking device for a moving bolster according to claim 1, wherein the braking means is an electromagnetic powder brake that uses a binding force of magnetic powder generated by energizing a coil as a braking force.