CN107053726A - A kind of mechanical synchronous low energy consumption hot press - Google Patents

Abstract

The invention discloses a mechanical synchronous low-energy-consumption hot press machine, which includes a frame body, and the frame body includes an upper base, a middle template, a lower template, a lower base and a column, and the middle template and The lower templates are respectively slidingly connected with the columns. An auxiliary oil cylinder is arranged between the middle formwork and the lower base, the cylinder body of the auxiliary oil cylinder is fixedly connected with the lower base, and the piston rod of the auxiliary oil cylinder is fixedly connected with the middle formwork through a locking block. A synchronous tie rod is arranged between the middle formwork and the lower formwork, the lower end of the synchronous tie rod is fixedly connected with the lower formwork, the upper end of the synchronization tie rod protrudes from the middle formwork and is slidably connected with the middle formwork, The upper end of the synchronous pull rod is provided with a limit block. This hot press can not only ensure the strict synchronous rise of the punch and die, but also reduce the displacement of the pump and reduce the energy consumption under the premise of ensuring the rapid rise of the punch and die.

Description

A mechanical synchronous low energy consumption heat press

technical field

The invention relates to the technical field of brake pad manufacturing equipment, in particular to a mechanically synchronous low-energy heat press.

Background technique

The working process of a traditional heat press machine used to make brake pads is as follows. First, the inner die of the middle mold unit is filled. Then close the mold, that is, the punch and the die move upwards synchronously under the action of the main oil cylinder until the upper plane of the die contacts the lower plane of the upper mold pressing plate. Then pressing, the main oil cylinder is pressurized to heat and press the raw material. In this process, there are mainly the following problems:

First, in the process of mold closing, the rising of the punch and the die is controlled by the main cylinder, because the main function of the main cylinder is to suppress the raw materials. In order to meet the pressure requirements during pressing, the bore of the main oil cylinder is generally larger. And because it is necessary to reserve a space for mold change, during the mold closing process, the synchronous rising distance of the punch and the die is relatively long, and the main cylinder drives the punch and the die to move upwards synchronously, or the rising speed will be very slow. The processing efficiency is seriously affected, or the displacement of the pump and the power of the motor must be increased to increase the rising speed, but this will inevitably increase the energy consumption of the equipment and increase the operating cost.

Second, since raw materials have been added to the die before the synchronous rise of the punch and die, in order to avoid leakage or overflow of raw materials, the punch and die must be strictly synchronized during the rising process. Traditional hot presses use hydraulic control to synchronize the punch and die. This control method not only cannot ensure the strict synchronization of the punch and die, but also increases the complexity of the hydraulic system and increases the manufacturing cost of the equipment.

Contents of the invention

In view of the above problems, the present invention provides a mechanical synchronous low-energy heat press, which can not only ensure the strict synchronous rise of the punch and die, but also ensure that the punch and die can rise rapidly. Under the premise, the displacement of the pump is reduced, and the energy consumption is low.

The technical scheme that the present invention solves its technical problem to take is:

A mechanical synchronous low-energy hot press, comprising a frame body, the frame body including an upper base, a middle formwork, a lower formwork, a lower base and a column, and the upper base and the lower base are respectively fixedly connected to the column, The middle formwork and the lower formwork are respectively slidably connected to the column;

The upper base is provided with an upper die heating and fixing assembly for fixing the upper die pressing plate, the middle die is provided with a middle die heating and fixing assembly for fixing the die, and the lower die is provided with a The lower mold of the mold is heated and fixed, and a main oil cylinder is arranged between the lower base and the lower template;

An auxiliary oil cylinder is arranged between the middle formwork and the lower base, the cylinder body of the auxiliary oil cylinder is fixedly connected with the lower base, and the piston rod of the auxiliary oil cylinder is fixedly connected with the middle formwork through a locking block;

A synchronous tie rod is arranged between the middle formwork and the lower formwork, the lower end of the synchronous tie rod is fixedly connected with the lower formwork, the upper end of the synchronization tie rod protrudes from the middle formwork and is slidably connected with the middle formwork, The upper end of the synchronous pull rod is provided with a limit block.

Further, the piston rod of the auxiliary oil cylinder is covered with a synchronous sleeve, and when the upper end surface of the synchronous sleeve is in close contact with the lower end surface of the locking block, the lower end surface of the die and the convex There is a 2-3 mm spacing between the bases of the mold.

Further, a mold changing spacer is provided on the synchronous pull rod between the limiting block and the middle plate.

Further, a U-shaped groove is arranged on the mold changing cushion block.

Further, the middle template is provided with a groove for accommodating the mold change pad.

Further, the lower template is provided with a U-shaped notch for accommodating the piston rod of the auxiliary cylinder.

The beneficial effects of the present invention are:

1. By setting auxiliary oil cylinders on both sides of the main oil cylinder, it is driven by the auxiliary oil cylinders during the mold closing process. Driven by the auxiliary cylinder, the piston rod of the main cylinder is passively stretched out, and the rodless chamber of the main cylinder passively absorbs oil, without the need for the pump to actively supply oil to the rodless chamber of the main cylinder, which greatly reduces the displacement of the pump and reduces the energy consumption.

2. By setting a synchronous tie rod between the middle platen and the lower platen, and setting a synchronous sleeve on the piston rod of the auxiliary cylinder, the synchronous movement of the punch and die during the mold closing process is ensured by means of mechanical hard limit. Synchronization is more reliable.

3. In the process of ejecting the finished brake pads, the synchronous sleeve is used for positioning to avoid rigid collision between the punch and die, which greatly prolongs the service life of the punch and die and reduces maintenance costs.

4. By setting the mold change pad on the synchronous pull rod, when the mold needs to be changed, just take off the mold change pad, which changes the traditional positioning method of using the induction switch, which not only improves the reliability of the operation of the equipment (the induction switch is easy to damage), and reduces the complexity of the control system.

5. A U-shaped groove is arranged on the mold changing cushion block, which facilitates the installation and disassembly of the mold changing cushion block.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is the schematic diagram of the enlarged structure of part A in Fig. 1;

Fig. 3 is the schematic diagram of the enlarged structure of part B in Fig. 1;

Fig. 4 is the top view of the present invention;

Fig. 5 is A-A sectional view in Fig. 4;

FIG. 6 is a schematic diagram of an enlarged structure of part C in FIG. 5;

Fig. 7 is a step diagram one during work;

Fig. 8 is the step diagram two during work;

Figure 9 is the step figure three during work;

Figure 10 is a schematic diagram of the structure when changing molds.

In the figure: 1-upper base, 11-upper mold heating and fixing assembly, 111-upper mold pressing plate, 2-middle template, 21-middle mold heating and fixing assembly, 211-concave mold, 22-first sliding sleeve, 3-lower Template, 31-lower mold heating and fixing assembly, 311-punch, 32-second sliding sleeve, 4-lower base, 5-column, 6-main cylinder, 7-auxiliary cylinder, 71-synchronous sleeve, 72-lock Tight block, 8-synchronous pull rod, 81-limiting block, 82-changing pad.

detailed description

As shown in Figure 1, a mechanical synchronous low-energy heat press includes a frame body, and the frame body includes an upper base 1, a middle template 2, a lower template 3, and a lower base 4 from top to bottom. The upper base 1, the middle template 2, the lower template 3 and the lower base 4 are connected as a whole through four columns 5, and the four columns 5 are arranged on the four corners of the frame body. Wherein the upper base 1 and the lower base 4 are fixedly connected with the column 5 respectively, and the middle template 2 and the lower template 3 are connected with the column 5 through the first sliding sleeve 22 and the second sliding sleeve 32 respectively. Swipe to connect.

As shown in FIG. 4 and FIG. 5 , an upper mold heating and fixing assembly 11 is arranged on the upper base 1 , and an upper mold pressing plate 111 is arranged at the lower end of the upper mold heating and fixing assembly 11 . A middle mold heating and fixing assembly 21 is arranged on the middle mold plate 2 , and a concave mold 211 is fixedly arranged on the middle mold heating and fixing assembly 21 . The lower mold plate 3 is provided with a lower mold heating and fixing assembly 31 , and the lower mold heating and fixing assembly 31 is provided with a convex mold 311 matched with the concave mold 211 . The lower base 4 is provided with a main oil cylinder 6 , the cylinder body of the main oil cylinder 6 is fixedly connected with the lower base 4 , and the piston rod of the main oil cylinder 6 is fixedly connected with the lower template 3 .

Here, the upper mold heating and fixing assembly 11 , the middle mold heating and fixing assembly 21 and the lower mold heating and fixing assembly 31 can all adopt the upper mold heating and fixing assembly 11 in the prior art, which will not be repeated here.

As shown in FIG. 2 and FIG. 5 , auxiliary cylinders 7 are respectively provided on both sides of the main cylinder 6 between the middle formwork 2 and the lower base 4 . The cylinder body of the auxiliary cylinder 7 is fixedly connected with the lower base 4, and the piston rod of the auxiliary cylinder 7 passes through the lower template 3 and is fixedly connected with the middle template 2 through a locking block 72 . The piston rod of the auxiliary cylinder 7 is located between the middle template 2 and the lower template 3 with a synchronous sleeve 71, and as shown in Figure 8, when the upper end surface of the synchronous sleeve 71 and the When the lower end surface of the locking block 72 is in close contact, there is a certain distance M between the lower end surface of the female die 211 and the seat body of the male die 311. Preferably, the value of M is 2-3 mm.

Further, for the convenience of installation, as shown in FIG. 2 , the lower template 3 is provided with a U-shaped notch for accommodating the piston rod of the auxiliary cylinder 7 .

As shown in Figures 2 and 5, between the middle template 2 and the lower template 3, synchronous pull rods 8 are respectively arranged on both sides of the main oil cylinder 6, and the lower end of the synchronous pull rod 8 is connected to the lower template. 3 is fixedly connected, and the upper end of the synchronous pull rod 8 protrudes from the middle template 2 and is slidably connected with the middle template 2. A limiting block 81 is arranged on the upper end of the synchronous tie rod 8 , and a mold changing pad 82 is arranged on the synchronous tie rod 8 between the aforementioned limiting block 81 and the middle template 2 . As a specific implementation, in this embodiment, the limiting block 81 is connected to the synchronous pull rod 8 through threads, and a set screw is arranged between the limiting block 81 and the synchronous pulling rod 8 .

Further, in order to facilitate the installation and disassembly of the mold changing cushion block 82, as shown in FIG.

Further, in order to avoid the position shift of the mold changing pad 82 during the working process, as shown in FIG. groove.

The steps at work are as follows,

First, in the state shown in FIG. 5 , feed raw materials into the cavity formed by the female die 211 and the male die 311 .

Second, then the piston rod of the auxiliary oil cylinder 7 stretches out to drive the middle template 2 to move upwards. As shown in Figure 5, since the die changing pad 82 is pressed between the stop block 81 and the middle template 2, the middle template 2 and the lower template 3 form a rigid whole. During the rising process of the middle template 2, the lower template 3 will rise synchronously with the middle template 2, and the rising process is strictly synchronized. Since the lower template 3 is fixedly connected with the piston rod of the main oil cylinder 6, the piston rod of the main oil cylinder 6 will be pulled out passively, and the rodless cavity of the main oil cylinder 6 will passively absorb oil, and no pump is needed in this process. Actively supply oil to the rodless chamber of the main oil cylinder 6, and the pump only needs to supply oil to the rodless chamber of the auxiliary oil cylinder 7 with a small cylinder diameter, which reduces the displacement of the pump.

Third, under the drive of the auxiliary cylinder 7, until the state shown in Figure 7 is reached, that is, the upper surface of the die 211 is in close contact with the lower surface of the upper die pressing plate 111, and the mold clamping process is completed.

Fourth, then the pressure of the auxiliary cylinder 7 remains constant, and the pump supplies oil to the rodless chamber of the main cylinder 6 at the same time, the main cylinder 6 moves, and the piston rod of the main cylinder 6 stretches out to suppress.

Fifth, after the pressing is completed, the main cylinder 6 is depressurized, and the piston rod of the auxiliary cylinder 7 is retracted until the upper end surface of the synchronization sleeve 71 is in close contact with the lower end surface of the locking block 72, as shown in Figure 8. displayed status. During this process, relative movement occurs between the die 211 and the punch 311 , and the pressed brake pad is ejected from the die 211 .

Sixth, then the main cylinder 6 is unloaded, and the piston rod of the auxiliary cylinder 7 continues to retract. Since the synchronization sleeve 71 is pressed between the middle template 2 and the lower template 3 at this time, the middle template 2 Form a rigid whole with the lower formwork 3. During the descending process of the middle template 2, the lower template 3 will descend together with the middle template 2 until reaching the state shown in FIG. 9 .

Seventh, then the piston rod of the auxiliary oil cylinder 7 stretches out and drives the middle template 2 to move upward, and the die 211 is separated from the punch 311 until the upper end surface of the die changing cushion block 82 and the lower end face of the stop block 81 Close to the state shown in Figure 5. Enter the next cycle.

When it is necessary to replace the mold, it is only necessary to remove the mold changing pad 82 in the seventh step, so that the middle template 2 moves upward until the upper surface of the middle template 2 is in contact with the stop Just stop when the lower end surface of block 81 is close, now as shown in Figure 10, described punch 311 has broken away from die 211 completely.

Claims (6)

1. a kind of mechanical synchronous low energy consumption hot press, including support body, it is characterised in that：Described support body include upper bed-plate, Middle template, lower template, lower bottom base and column, described upper bed-plate and lower bottom base are fixedly connected with column respectively, described middle mould Plate and lower template are slidably connected with column respectively；

The upper mould for fixing upper molded plate is provided with described upper bed-plate and heats setting in fixation kit, described middle template Have to heat to be provided with fixation kit, described lower template for the middle mould of anchor mould and heated admittedly for the lower mould of solid punch Determine component, master cylinder is provided between described lower bottom base and lower template；

Auxiliary cylinder is provided between the middle template and lower bottom base, the cylinder body of the auxiliary cylinder is fixedly connected with lower bottom base, The piston rod of described auxiliary cylinder is fixedly connected by latch segment with described middle template；

Synchronous pull rod is provided between described middle template and lower template, the lower end of the Synchronous pull rod is fixed with lower template to be connected Connect, the upper end of the Synchronous pull rod protrudes from described middle template and is slidably connected with described middle template, the Synchronous pull rod Upper end be provided with limited block.

2. a kind of mechanical synchronous low energy consumption hot press according to claim 1, it is characterised in that：The auxiliary cylinder Upper cover of piston rod be provided with synchronous sleeve, it is described and when the upper surface of the synchronous sleeve and the lower surface of latch segment are adjacent to There is 2-3mm spacing between the pedestal of the lower surface of cavity plate and the punch-pin.

3. a kind of mechanical synchronous low energy consumption hot press according to claim 1, it is characterised in that：Described synchronous drawing It is located on bar and is provided with mold changing cushion block between described limited block and middle template.

4. a kind of mechanical synchronous low energy consumption hot press according to claim 3, it is characterised in that：Described mold changing pad U-type groove is provided with block.

5. a kind of mechanical synchronous low energy consumption hot press according to claim 3, it is characterised in that：Described middle template On be provided with for accommodate it is described mold changing cushion block groove.

6. a kind of mechanical synchronous low energy consumption hot press according to claim 1, it is characterised in that：Described lower template On be provided with U-shaped breach for accommodating the auxiliary cylinder piston rod.