CN204413071U - SERVO CONTROL high-speed multi-station core making machine - Google Patents

Abstract

The utility model relates to a servo-controlled high-speed multi-station core-making machine, the structure of which includes a base, a column, a rotary worktable, a servo motor drive device, a mold lifting mechanism, a lower core-jacking mechanism, an auxiliary positioning mechanism, an upper beam frame, The upper mold opening mechanism, sand shooting mechanism, air blowing mechanism and other auxiliary mechanisms. The core box mold is installed on the rotary table. Three sets of core box molds can be installed at the same time. The support is connected to the upper beam frame, and the upper mold opening mechanism, sand storage hopper, air bag, sand injection head box and air blowing head are arranged on the upper beam frame. The utility model has the advantages of compact structure, easy equipment operation, PLC automatic control, convenient daily maintenance, high core-making efficiency, and a core-making cycle only takes about 16 seconds.

Description

Servo-controlled high-speed multi-station core making machine

technical field

The utility model relates to a core-making device, in particular to a servo-controlled high-speed multi-station core-making machine.

Background technique

Core-making equipment is one of the essential equipment in the production process of sand core production in foundry technology. The working principle of the core-making equipment is that the relevant parts of the core-making equipment drive the opening and closing of the core box mold, and use compressed air to instantly inject the mixed core sand into the cavity of the core box. The time of this process is generally about 3 -5 seconds, then blow the preheated triethylamine (or other catalytic gas) into the core box cavity, the core sand can be hardened in a short time (5-10 seconds) in the core box cavity, and then the sand core The sand core is ejected from the core box mold through the ejection mechanism of the core making machine.

The existing core-making equipment is mainly composed of a frame, an upper injection head, an air blower, an upper mold opening mechanism, a core box upper mold, a core box lower mold, a lower core box workbench, and various driving mechanisms. The sand head and air blow head are driven by the air cylinder or oil cylinder, and move back and forth linearly along the guide rail on the frame, so that the sand injection head or the air blow head reach the top of the core box mold respectively, and perform sand shooting and air blowing operations respectively; on the core box The mold is fixed on the upper mold opening mechanism, which is driven by the lifting cylinder to open and close the mold up and down; the core box lower mold is installed on the lower core box table, and the lower core box table and core box are driven by the table moving mechanism Move back and forth. In cooperation with the above-mentioned mechanical structure, an electric control system and a hydraulic system are set.

The main disadvantages of the core making machine with the above structure are: 1. Only one set of molds can be installed on each device, the production variety is single, and the production efficiency is low; Maintenance is inconvenient, the mechanical structure is complicated, and mechanical failures are prone to occur; 3. The upper core box mold and the lower core box mold are installed on different parts of the equipment, and the positioning accuracy is not easy to guarantee, and it is easy to cause wrong mold problems; 4. For the current large number of The production of sand cores for automobile brake disc casting lacks special core-making equipment at home and abroad, and the production efficiency of general-purpose core-making equipment for sand cores for automobile brake disc casting is low, which cannot meet the production needs of foundry enterprises; 5. The overall structure of the equipment Complicated and difficult to maintain.

Utility model content

The purpose of the utility model is to provide a servo-controlled high-speed multi-station core-making machine to solve the problems of less installed molds and low production efficiency of the existing core-making machine.

The utility model is achieved in the following way: a servo-controlled high-speed multi-station core making machine, a circular rotary table is arranged on the base, and a servo motor is provided inside the base to drive the rotation of the rotary table. Three core box brackets are evenly arranged on the circumference of the rotary workbench; columns are respectively fixed at the four corners of the base, and the upper beam supports are connected to the upper ends of the four columns; on the top of the upper beam A sand storage hopper, an air bag and an upper mold opening mechanism are fixedly installed on the surface, and a gate valve is provided at the lower opening of the sand storage hopper; a sand injection head and an air blowing head are installed at the bottom of the upper beam The sand head is connected with the sand storage hopper, the air bag is connected with the blowing head through an air supply pipeline, and the upper mold opening mechanism is located at the front gap of the upper beam; The core box first lifting cylinder, the core box second lifting cylinder and the lower core cylinder are arranged in the middle, the core box first lifting cylinder is opposite to the position of the sand shooting head up and down, and the core box second lifting cylinder is up and down. The lifting cylinder is up and down relative to the position of the blowing head, and the position of the lower core cylinder is relative to the position of the upper mold opening mechanism on the upper beam; the three core box supports are in the rotating When the workbench is rotated to a stop, it corresponds to the positions of the first lift cylinder of the core box, the second lift cylinder of the core box and the lower core cylinder.

The upper mold opening mechanism includes an upper mold opening cylinder, a cylinder bracket and an upper mold suspension mechanism, the cylinder bracket is fixed on the upper beam frame, the upper mold opening cylinder is installed on the cylinder bracket, and the upper mold opening The mold suspension mechanism is connected with the piston rod of the upper mold opening cylinder, and is driven by the upper mold opening cylinder to complete the core box mold opening operation by moving up and down.

The utility model arranges the three stations of core box sand shooting, core box blowing and mold opening and picking in the core making process on a circular rotary workbench, which is supported by a rotary support mechanism and driven by a servo motor. Control the rotation angle and the position is precise. Three identical or different core box molds can be installed on the core box brackets on the above three stations of the rotary table to produce the same or different sand core products. Core box sand shooting, core box air blowing, and mold opening and pick-up can be carried out separately at the three stations without affecting each other. Except that the rotary table is driven by the servo motor, other actions such as sand shooting, air blowing and mold opening and closing are all driven by the cylinder.

The utility model is particularly suitable for making sand cores of automobile brake disc casting products, and is also suitable for making other disc sand cores. Compared with the existing core making machine, the utility model has the following advantages:

1. Three sets of core-making molds can be installed on the rotary table at the same time, and the core-making molds only need to be connected with the core box bracket, which is easy to install and reliable in positioning. 2. On the three stations on the rotary table, the three process operations of core box sand shooting, core box blowing and mold opening can be arranged correspondingly. The three stations are carried out at the same time, and the production efficiency is increased by at least three times. 3. The core box upper mold and the upper mold opening mechanism are connected by floating suspension. The mold closing accuracy of the core box upper mold and the core box lower mold is only determined by the core box mold itself. Therefore, the accuracy requirements for the core making equipment are reduced. 4. One piece of equipment has three operating stations and is operated by one person, which reduces the number of workers, reduces labor costs, and improves the market competitiveness of products.

The utility model has the advantages of compact structure, easy equipment operation, PLC automatic control, convenient daily maintenance, high core-making efficiency, and a core-making cycle only takes about 16 seconds.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a front view of the utility model.

Fig. 3 is a structural schematic diagram of the base and the rotary table.

In the figure: 1. Base, 3. Rotary table, 4. Auxiliary positioning device, 5. Column, 6. Upper beam frame, 7. Upper mold opening mechanism, 8. Sand storage hopper, 9. Air bag, 10. Core Box upper mold, 11, core box lower mold, 12, core box second lifting cylinder, 13, lower top core cylinder, 14, rotary support mechanism, 15, sliding sleeve, 16, sand injection head, 17, blowing head , 18, core box support, 19, V-shaped groove.

Detailed ways

As shown in Figure 1, the utility model includes a base 1, a column 5, a rotary table 3, a servo motor drive device, a mold lifting mechanism, a lower core mechanism, an auxiliary positioning mechanism, an upper beam frame 6, and an upper mold opening mechanism 7 , Sand shooting mechanism, air blowing mechanism and other auxiliary institutions, etc.

The base 1 is a rectangular frame made of steel plates, section steel, etc., and the base 1 is provided with a lower core cylinder 13, a core box first lift cylinder, a core box lift cylinder 12 and corresponding position control devices. A rotary support mechanism 14 ( FIG. 2 ) is provided in the middle of the base 1 to support the rotating shaft connected to the bottom of the rotary table 3 . The rotary table 3 is supported by a rotary support mechanism and driven by a servo motor to control the rotation angle and stop position, so as to complete the action cycle of the core box in the three stations of sand shooting, air blowing and mold opening and picking. The four corners of the base 1 are fixedly connected with four uprights 5, and the top of the uprights 5 supports and connects the upper beam frame 6, and the connection between the upright column 5 and the base 1 and the upper beam frame 6 is bolted. On the top surface of the upper beam frame 6, an upper mold opening mechanism 7, an air bag assembly, a storage hopper 8, an air supply system, etc. are installed, and on the bottom surface of the upper beam frame 6, a sand shooting head 16 and an air blowing head 17, etc. are installed ( figure 2).

The upper mold opening mechanism 7 is composed of an upper mold opening cylinder, a guide column sliding sleeve, a cylinder bracket and an upper mold suspension mechanism. The upper mold opening cylinder is connected to the upper beam frame 6 through the support of the cylinder bracket. The guide sleeve, connecting plate, etc. are connected to the piston rod of the upper mold opening cylinder and move up and down under the drive of the upper mold opening cylinder to drive the core box upper mold 10 to move up and down to complete the core box mold opening operation.

In Fig. 3, the rotary table 3 is a circular disc rack, and on the rotary table 3, three core box supports 18 are evenly distributed on a circle centered on the center of the table top, and the core box supports 18 pass through the sliding sleeve 15 (Fig. 2 ) connected to the rotary table 3. In Fig. 1, the core box lower mold 11 is fixedly installed on the core box support 18 by fasteners, the core box support on the core box sand shooting station at the left rear of the frame and the core box blowing station at the right rear 18. It can move up and down under the drive of the core box first lifting cylinder and the core box second jacking cylinder 13. The core box bracket on the mold opening and picking station at the front of the frame can be set inside the bracket Driven by the core box ejector pin and the lower core cylinder 13, the sand core in the core box lower mold 11 is jacked up, which is convenient for the operator to move the sand core and complete the pick-up operation.

The utility model can be controlled by a PLC controller, can perform automatic/manual operation, and is especially suitable for making sand cores for casting automobile brake discs.

In order to ensure the accuracy of the rotation angle of the rotary table 3 and eliminate the position error caused by the gear clearance of the servo motor transmission system, an auxiliary positioning device 4 (Fig. Insert one of the three V-shaped grooves 19 ( FIG. 3 ) provided on the edge of the rotary table 3 after the rotation stops, so as to achieve the purpose of accurately positioning the rotary table 3 .

A gate valve is installed at the lower opening of the sand storage hopper 8 fixedly installed on the top surface of the upper beam frame 6 to control whether to discharge or not. The sand shooting head 16 set at the bottom of the upper beam frame 6 communicates with the sand storage hopper 8 at the top of the upper beam frame, and the first lifting cylinder (not shown) of the core box set in the base 1 is installed on the upper beam frame 6 The position of the sand-shooting head 16 is relative up and down, and can be opposite to the position of the core box support 18 on the rotary table 3 to the core box sand-shooting station, so as to fix the core box support to the core box The core box moulds in the bracket go up together, so that the core box moulds are in close contact with the sand-shooting head 16, and the core box sand-shooting operation is completed through the sand inlet holes on the core box moulds.

An air supply pipeline is passed through the upper beam frame 6, and the air supply pipeline communicates with the air bag 9 and the air blowing head 17, and the air supply pipeline is also connected to the sand storage hopper 8 to provide sand-shooting airflow. The core box second lifting cylinder 12 set in the base 1 is opposite to the position of the blowing head 17 on the upper beam frame 6 up and down, and can be rotated to the core box at the core box blowing station on the rotary table 3 The position of the box support 18 is opposite up and down, so that the core box support and the core box mold fixed in the core box support are lifted together, so that the core box mold is in close contact with the blowing head and passes through the sand inlet hole on the core box mold. Complete the core box blowing operation.

The upper mold opening mechanism 7 fixedly installed on the top surface of the upper beam frame 6 is located above the gap at the front part of the upper beam frame 6, so that the upper mold suspension mechanism of the upper mold opening mechanism 7 passes through the gap on the upper beam frame and penetrates into the upper beam frame. The lower space of the beam frame is suspended to connect the core box upper mold 10, and under the drive of the upper mold opening cylinder, the upper mold suspension mechanism drives the core box upper mold 10 to move up and down to complete the core box mold opening operation.

The lower core cylinder 13 set in the base 1 is opposite to the position of the upper mold opening mechanism 7 on the upper beam frame 6 up and down, and is rotated to the core box support 18 at the mold opening and picking station on the rotary table 3 The positions are relatively up and down, so that after the core box mold opening in the core box support 18, the sand core made by blowing and solidifying is pushed out of the core box lower mold 11 upwards to complete the sand core ejection operation.

The working principle and working process of the utility model are as follows: the mixed material sand is added to the sand storage hopper 8 on the top, and then controlled by the butterfly valve, it is added into the sand shooting cylinder, and the material sand is injected into the core box mold by means of compressed air In the cavity of the cavity, the servo motor drives the rotary table 3 to rotate, and transfers the core box to the core box blowing station, and the sand core in the core box mold hardens after blowing, and then the core box is transferred to the mold In the pick-up station, the upper mold opening mechanism 7 opens the upper mold of the core box, and the lower ejector core cylinder 13 ejects the prepared sand core, and the operator takes off the sand core. The other two sets of core box molds circulate according to this working mode. The operation of each action is automatically controlled by the PLC controller. The sand core mold is installed from the front of the body, and the three sets of sand core molds are installed in sequence. When the equipment is working, the operating station in front of the machine body is the mold opening and pick-up station, the two stations behind it, the core box sand shooting station at the left rear, and the core box blowing station at the right rear, and the three operators Bits operate at the same time without affecting each other, thus greatly improving the working efficiency of the equipment.

Claims (2)

1. a SERVO CONTROL high-speed multi-station core making machine, it is characterized in that, base is provided with circular rotating workbench, is provided with the servomotor driving described rotary table to rotate in the inside of described base, described rotary table is circumferentially evenly provided with three core box supports; Be fixed with column respectively in the corner of described base, upper roof beam structure support and connection are in the upper end of four described columns; The end face of roof beam structure is installed with storage sand hopper, gas bag and upper die opening mechanism on described, and the end opening of described storage sand hopper is provided with gate valve; The bottom of roof beam structure is provided with sand-shooting head and blow head on described, and described sand-shooting head is connected with described storage sand hopper, and described gas bag is connected by supply air line with described blow head, and described upper die opening mechanism is positioned at the anterior indentation, there of described upper roof beam structure; Core box first lifting cylinder, core box second lifting cylinder and lower plunger tip cylinder is provided with in described base, described core box first lifting cylinder is relative up and down with the position of described sand-shooting head, described core box second lifting cylinder is relative up and down with the position of described blow head, and described lower plunger tip cylinder is relative up and down with the position of the described upper die opening mechanism on described upper roof beam structure; It is corresponding relative up and down with the position of described core box first lifting cylinder, described core box second lifting cylinder and described lower plunger tip cylinder that three described core box supports revolve the stopping time at described rotary table.

2. SERVO CONTROL high-speed multi-station core making machine according to claim 1; it is characterized in that; described upper die opening mechanism comprises die sinking cylinder, air cylinder support and patrix hitch; described air cylinder support is fixed on described upper roof beam structure; described upper die sinking cylinder is arranged on described air cylinder support, and described patrix hitch is connected with the piston rod of described upper die sinking cylinder.