CN210719365U

CN210719365U - Weighing device and press

Info

Publication number: CN210719365U
Application number: CN201922139020.8U
Authority: CN
Inventors: 吴佩芳; 释加才让; 孙志远; 曹静武; 胡晨; 石一婷
Original assignee: Beijing Tianren Daohe New Materials Co ltd
Current assignee: Beijing Tianren Daohe New Materials Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-06-09
Anticipated expiration: 2029-11-28

Abstract

A weighing device and a press, the weighing device comprising: a main storage bin; the weighing bin is used for weighing materials, the weighing bin is communicated with the main bin through a connecting channel, and a spiral rotating rod is arranged in the connecting channel; the spiral rotating rod is provided with threads for containing the materials, the spiral rotating rod is driven to rotate, the materials contained in the threads are transferred to the discharge port from the feed port of the connecting channel, the feed port is communicated with the main material bin, and the discharge port is communicated with the weighing bin. The problem of current weighing device can't accurate control get into the powder quality of weigh bin is solved, and still have the operation complicacy, work efficiency is low.

Description

Weighing device and press

Technical Field

The utility model relates to a dosing unit technical field, concretely relates to weighing device and press.

Background

Weighing devices are widely used in various fields, and particularly in the field of powder metallurgy, the weighing precision needs to be strictly controlled. In the traditional powder metallurgy forming technology, powder is placed in a die cavity, and a four-column press is used for applying vertical force to loose powder to compact the powder, so that a blank with certain strength is obtained. The size of the green body directly influences the size of the sintered part, and the size of the green body is determined by the amount of powder in the cavity. Therefore, in order to ensure the compactness of the part and the size of the final dimension, the control of the amount of powder in the cavity of the die is a key step of the powder metallurgy pressing process.

At present, in the traditional powder metallurgy pressing, the height of a die cavity is controlled to obtain a volume cavity, and powder is filled into the volume cavity so as to determine the powder filling quality, which is commonly called as a volume method. Because the volume of volume chamber can't accurate regulation, the apparent density of powder is different and powder distributes inhomogeneous problem when the volume intracavity is filled to the powder, causes to fill to the volume intracavity powder also can't accurate control. The following problems result: the problem that the quality of powder can not be accurately controlled, the problem that the quality fluctuation is large in the powder pressing process and the problem that the rejection rate of parts is high. Moreover, the volume of the volume cavity needs to be obtained through calculation in the adjusting mode, the height of the cavity needs to be accurately adjusted, and the process is time-consuming and labor-consuming.

Prior art for example, patent document No. CN209302663U discloses an automatic mixer, which comprises a batching device, a conveying device and a mixing device, wherein the batching device is connected with the mixing device through the conveying device, and the batching device and the conveying device are connected. The batching device adopts a heavy batching device. Weighing type dosing unit comprises feed bin and the storehouse of weighing usually, and the material in the feed bin is discharged into the storehouse of weighing, weighs to the material in the storehouse of weighing through components such as sensor, and when weight reaches required back, the blow-off valve of feed bin is closed, and the blow-off valve in the storehouse of weighing is opened, and the material in the storehouse of will weighing is discharged. Although the technical scheme discloses that the weighing bin is adopted to replace the existing volume cavity to weigh the powder. However, it does not allow precise control of the amount of powder entering the weighing compartment. When the material in the feed bin is placed into the weighing bin in an artificial mode, the weight of the powder is difficult to accurately control, and the powder is easily placed. Moreover, the powder metallurgy efficiency is greatly reduced by adopting a manual feeding mode.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the unable accurate control of current weighing device and getting into the powder quality of weigh bin, and still has the problem that the operation is complicated, work efficiency is low. Thereby providing a weighing apparatus comprising:

a main storage bin;

the weighing bin is used for weighing materials, the weighing bin is communicated with the main bin through a connecting channel, and a spiral rotating rod is arranged in the connecting channel;

the material distribution bin is arranged below the weighing bin and communicated with the weighing bin;

the spiral rotating rod is provided with threads for containing the materials, the spiral rotating rod is driven to rotate, the materials contained in the threads are transferred to the discharge port from the feed port of the connecting channel, the feed port is communicated with the main material bin, and the discharge port is communicated with the weighing bin.

The weighing device still includes: the sleeve is sleeved on the length direction of the spiral rotating rod, and the sleeve and the spiral rotating rod enclose the connecting channel.

The sleeve is attached to the spiral rotating rod.

The discharge gate sets up telescopic tip, the feed inlet sets up it keeps away from on the lateral wall of discharge gate one side of sleeve.

The spiral rotating rods are provided with at least two different pitch values.

The screw rod comprises a first screw rod and a second screw rod, wherein the screw pitch of the second screw rod is larger than that of the first screw rod, and the diameter of the first screw rod is smaller than that of the second screw rod.

The spiral rotating rod is connected with a variable speed driving mechanism.

The weighing bin is arranged right below the main bin, and the spiral rotating rod is arranged in the connecting channel along the horizontal direction.

The weighing device still includes:

the wrong weighing hopper is arranged below the weighing bin, the weighing bin is driven to move and is provided with a material receiving position opposite to the material distribution bin and a material recovery position opposite to the wrong weighing hopper; and when the weighing bin is positioned at the material recovery position, the materials are poured into the wrong weighing hopper.

The material is powder material required in powder metallurgy, and the weighing device is used for weighing and/or conveying the powder material.

A press comprises

The above weighing device.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a weighing device, include: a main storage bin; the weighing bin is used for weighing materials, the weighing bin is communicated with the main material bin, the weighing bin is connected with the main material bin through a connecting channel, and a spiral rotating rod is arranged in the connecting channel; the spiral rotating rod is provided with threads for containing the materials, the spiral rotating rod is driven to rotate, the materials contained in the threads are transferred to the discharge port from the feed port of the connecting channel, the feed port is communicated with the main material bin, and the discharge port is communicated with the weighing bin. The utility model discloses a weigh the storehouse and replace current volume chamber to weigh materials such as powder metallurgy, avoided traditional powder metallurgy suppression effectively to need through the height of control mold cavity to obtain a volume chamber, fill this volume intracavity with the powder, thereby confirm the quality of dress powder. Further, the problems that the volume of the volume cavity cannot be accurately adjusted, the loose packing density of the powder is different, and the powder is not uniform when the powder is filled in the volume cavity in the method are solved, and the problem that the amount of the powder filled in the volume cavity cannot be accurately controlled is solved. The problems that the quality of powder cannot be accurately controlled, the quality fluctuation is large in the powder pressing process, and the rejection rate of parts is high are solved. And, through the utility model discloses a mode also need not to reachd the volume in volume chamber through calculating, and the accurate adjustment die cavity height has improved work efficiency repeatedly. In addition, the weighing bin and the main bin are connected through a connecting channel, and a spiral rotating rod is arranged in the connecting channel; the spiral rotating rod is provided with threads for containing the materials, the spiral rotating rod is driven to rotate, the materials contained in the threads are transferred to the discharge port from the feed port of the connecting channel, the feed port is communicated with the main material bin, and the discharge port is communicated with the weighing bin, so that the quantity of the materials such as powder metallurgy and the like led into the weighing bin is effectively controlled, the effect of accurately controlling the weight of the materials entering the weighing bin is achieved, the problem that the quantity of the materials entering the weighing bin is difficult to control is avoided, and the weighing precision and the weighing efficiency are improved.

2. The utility model provides a weighing device still includes: the sleeve is sleeved on the length direction of the spiral rotating rod, and the sleeve and the spiral rotating rod enclose the connecting channel. Put the sleeve on the spiral bull stick through above-mentioned cover, can make sleeve and spiral bull stick enclose into interface channel for each section of interface channel all holds equal-quantity powder metallurgy material, can put into weighing compartment with quantitative powder metallurgy material accurately when the spiral bull stick rotates, avoids the problem that how much is difficult to accurate control of the material that drops into in the weighing compartment.

3. The utility model provides a weighing device, spiral rotating rod is a plurality of roots, a plurality of spiral rotating rod has two kinds at least different pitch values, and the pitch on a spiral rotating rod is the same. Through the spiral rotating rods with a plurality of different pitch values, an operator can effectively adjust the weight of materials entering the weighing bin according to actual needs, so that the weighing accuracy and the weighing efficiency of the weighing device are further improved, and the problem of blank scrap caused by weight problems is reduced.

4. The utility model provides a weighing device, spiral shell rotary rod links to each other with variable speed actuating mechanism. Through the rotational speed of above-mentioned variable speed drive mechanism control spiral shell rotary rod, can control the material weight that gets into in the weigh bin in the unit interval effectively to make the operator control adjustment get into the material weight in the weigh bin according to actual need, thereby further improve weighing device's the accurate nature of weighing and efficiency of weighing, reduce because the pressed compact that the weight problem leads to scraps the problem.

5. The utility model provides a weighing device, the weighing bin is arranged under the main bin, and the material distribution bin is arranged under the weighing bin and communicated with the weighing bin; the spiral rod is arranged in the connecting channel along the horizontal direction. Through setting gradually main feed bin, weigh the storehouse, wrong weighing hopper and cloth storehouse from last to down, can rely on the action of gravity to make the material get into weigh storehouse, wrong weighing hopper and cloth storehouse effectively, improve product competitiveness.

6. The utility model provides a weighing device, include: the wrong weighing hopper is arranged below the weighing bin, the weighing bin is driven to move and is provided with a material receiving position opposite to the material distribution bin and a material recovery position opposite to the wrong weighing hopper; and when the weighing bin is positioned at the material recovery position, the materials are poured into the wrong weighing hopper. The bottom of the weighing bin is provided with a switch door controlled by a motor, and the weighing bin can move left and right. The weighing bin is right above the material distribution bin under the default condition, if the weighing is accurate, the weighing bin opens the bin door at the bottom, and powder can automatically fall into the material distribution bin. If the weighing is wrong, the weighing bin can move horizontally to the position above the wrong weighing hopper to drop powder materials. Therefore, the powder material with wrong weight can be effectively recycled through the wrong weighing hopper.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the internal structure of the weighing apparatus provided by the present invention;

fig. 2 is a schematic view of the installation position of the spiral rotating rod of the weighing device provided by the present invention;

fig. 3 is a schematic view illustrating the connection between the sleeve and the helical rod according to the present invention;

fig. 4 is a top view of the weighing apparatus provided by the present invention;

fig. 5 is a schematic view of the arrangement positions of the first screw rod and the second screw rod provided by the present invention.

Description of reference numerals:

1-a main storage bin; 2-a weighing bin; 3-connecting the channels; 4-spirometric rods; 5-a feed inlet; 6-discharging port; 7-a sleeve; 8-a first screw rod; 9-a second screw rod; 10-wrong weighing hopper; 11-distributing bin.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

There is described a press for powder metallurgy, as shown in fig. 1 and 2, comprising:

a main storage bin 1;

the weighing bin 2 is used for weighing materials, the weighing bin 2 is communicated with the main bin 1 through a connecting channel 3, and a spiral rotating rod 4 is arranged in the connecting channel 3;

the material distribution bin 11 is arranged below the weighing bin 2 and communicated with the weighing bin 2; the utility model discloses a weigh the storehouse and replace current volume chamber to weigh materials such as powder metallurgy, avoided traditional powder metallurgy suppression effectively to need through the height of control mold cavity to obtain a volume chamber, fill this volume intracavity with the powder, thereby confirm the quality of dress powder. Further, the problems that the volume of the volume cavity cannot be accurately adjusted, the loose packing density of the powder is different, and the powder is not uniform when the powder is filled in the volume cavity in the method are solved, and the problem that the amount of the powder filled in the volume cavity cannot be accurately controlled is solved. The problems that the quality of powder cannot be accurately controlled, the quality fluctuation is large in the powder pressing process, and the rejection rate of parts is high are solved. And, through the utility model discloses a mode also need not to reachd the volume in volume chamber through calculating, and the accurate adjustment die cavity height has improved work efficiency repeatedly.

The wrong weighing hopper 10 is arranged below the weighing bin 2, the weighing bin 2 is driven to move, and the wrong weighing hopper 10 is provided with a material receiving position opposite to the material distribution bin 11 and a powder material recovery position opposite to the wrong weighing hopper 10; when the weighing bin 2 is positioned at the powder material recovery position, powder materials are poured into the wrong weighing hopper 10; the bottom of the weighing bin 2 is provided with a switch door controlled by a motor, and the weighing bin 2 can move left and right. The weighing bin 2 is arranged right above the material distribution bin 11 by default, and if the weighing is accurate, the weighing bin 2 opens a bin door at the bottom, and powder can automatically fall into the material distribution bin 11. If weighing is wrong, the weigh bin 2 will move horizontally above the wrong weigh hopper 10 to drop the powder material. Therefore, the wrong-weight powder material can be effectively recycled through the wrong weighing hopper 10. If the weight of the powder in the weighing bin 2 meets the set weight of +/-0.5 g, the powder falls into a material distribution bin 11, and the material distribution bin 11 introduces the powder into a die cavity for pressing; if the weight of the powder in the weighing bin 2 does not satisfy the set weight of ± 0.5g, the powder falls into the wrong weighing hopper 10, is collected in a centralized manner, and can be reused.

In this embodiment, as shown in fig. 3 to 5, a screw thread for accommodating the powder material is provided on the screw rod 4, the screw rod 4 is driven to rotate to transfer the powder material accommodated in the screw thread from a feed port 5 of the connecting channel 3 to a discharge port 6, the feed port 5 is communicated with the main bin 1, and the discharge port 6 is communicated with the weighing bin 2. The spiral rotating rod 4 is sleeved with a sleeve 7 in the length direction, and the sleeve 7 is attached to the spiral rotating rod 4 to form the connecting channel 3. And the discharge port 6 is arranged at the end part of the sleeve 7, and the feed port 5 is arranged on the side wall of the sleeve 7 far away from the discharge port 6. Thereby accomplish the guide work through above-mentioned spiral rotating rod 4 and control effectively and lead to weighing bin 2 the powder metallurgy etc. material how much to reach the effect of accurate control entering weighing bin 2 interior material weight, thereby avoid getting into weighing bin 2 the material how much be difficult to the problem of control, improve and weigh the precision and weigh efficiency. In addition, through above-mentioned sleeve 7 of putting on spiral bull stick 4 of cover, can make sleeve 7 and spiral bull stick 4 enclose into interface channel 3 for each section of interface channel 3 all holds the powder metallurgy material of equivalent, can accurately drop quantitative powder metallurgy material into weigh bin 2 when spiral bull stick 4 rotates, avoids dropping into the problem that how much the material in weigh bin 2 is difficult to accurate control.

In this embodiment, the number of the spiral rods 4 is four, the spiral rods 4 include two first spiral rods 8 and two second spiral rods 9 having a pitch greater than that of the first spiral rods 8, and the diameter of the first spiral rods 8 is smaller than that of the second spiral rods 9. The first spiral rod 8 and the second spiral rod 9 are adjacently arranged to form one group of spiral rotating rods 4, and the spiral rotating rods 4 are provided with two groups. And, the spiral rotation rod 4 is connected to a speed change driving mechanism. The main bin 1 drops the powder in the bin into the weighing bin 2 through the first screw rod 8 and the second screw rod 9, and the first screw rod 8 and the second screw rod 9 adjust the rotating speed under the control of the variable speed driving mechanism by inputting a gram weight value so as to control the weight of the powder falling into the weighing bin 2. When the weight of the powder in the weighing bin 2 is less than 80-85% of the set weight, the speed of the second screw rod 9 is 80% of the maximum speed, and the speed of the first screw rod 8 is 80% of the maximum speed; when the weight reaches 85-95%, the second screw rod 9 stops rotating, and the first screw rod 8 continues to feed at 80%; when the weight reaches 95-98%, feeding by the first screw rod 8 at a speed of 60%; when the weight is more than or equal to 98 percent and less than or equal to 100 percent, the first screw rod 8 feeds materials at a speed of 15 percent until the total weight of the powder in the weighing bin 2 meets the standard; and the weighing bin 2 is provided with a precise weighing device, and the powder in the main bin 1 falls into the weighing bin 2 for weighing with the weighing precision of +/-0.5 g. Through the spiral bull stick 4 that sets up many different pitch values, can make the operator adjust the material weight that gets into in the weigh bin 2 according to actual need effectively to further improve weighing device's the accurate nature of weighing and efficiency of weighing, reduce because the pressed compact that the weight problem leads to scraps the problem. Moreover, the rotating speed of the spiral rotating rod 4 is controlled by the variable speed driving mechanism, so that the weight of the material entering the weighing bin 2 in unit time can be effectively controlled, an operator can control and adjust the weight of the material entering the weighing bin 2 according to actual needs, the weighing accuracy and the weighing efficiency of the weighing device are further improved, and the problem of blank scrap caused by weight problems is reduced.

Of course, the utility model discloses the application does not do specific restriction to the quantity and the pitch of spiral pole 4, and in other embodiments, spiral pole 4 is three groups, and every group has three or more spiral pole 4, and the pitch increases in proper order.

Of course, the utility model discloses the application does not do specific restriction to the feed inlet 5 and its two positions of discharge gate 6 that set up on sleeve 7, and in other embodiments, feed inlet 5 and discharge gate 6 can also set up respectively at the both ends of sleeve 7.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A weighing apparatus, comprising:

a main silo (1);

the weighing bin (2) is used for weighing materials, the weighing bin (2) is communicated with the main bin (1) through a connecting channel (3), and a spiral rotating rod (4) is arranged in the connecting channel (3);

the spiral rotating rod (4) is provided with threads used for containing the materials, the spiral rotating rod (4) is driven to rotate, the materials contained in the threads are transferred to the discharge port (6) from the feed port (5) of the connecting channel (3), the feed port (5) is communicated with the main storage bin (1), and the discharge port (6) is communicated with the weighing bin (2).

2. The weighing apparatus of claim 1, further comprising: the sleeve (7) is sleeved on the length direction of the spiral rotating rod (4), and the sleeve (7) and the spiral rotating rod (4) are encircled to form the connecting channel (3).

3. A weighing device according to claim 2, wherein said sleeve (7) and said helical rod (4) are in abutment.

4. A weighing device as claimed in claim 2 or 3, characterised in that the discharge opening (6) is provided at the end of the sleeve (7), the feed opening (5) being provided in the side wall of the sleeve (7) on the side remote from the discharge opening (6).

5. Weighing device according to claim 1, characterised in that said helical rods (4) are several, said several helical rods (4) having at least two different pitch values.

6. A weighing device according to claim 5, wherein said helical rods (4) comprise a first helical rod (8), and a second helical rod (9) having a greater pitch than said first helical rod (8), said first helical rod (8) having a smaller diameter than said second helical rod (9).

7. A weighing device according to claim 1, characterised in that the helical rod (4) is connected to a variable speed drive mechanism.

8. Weighing device according to claim 1, characterised in that the weighing compartment (2) is arranged directly below the main bin (1), the helical rod (4) being arranged in the connecting channel (3) in a horizontal direction.

9. The weighing apparatus of claim 8, further comprising:

the wrong weighing hopper (10) is arranged below the weighing bin (2), the weighing bin (2) is driven to move, and the wrong weighing hopper (10) is provided with a material receiving position opposite to the material distribution bin (11) and a material recovery position opposite to the wrong weighing hopper (10); and when the weighing bin (2) is positioned at the material recovery position, the materials are poured into the wrong weighing hopper (10).

10. Weighing device according to claim 1, characterised in that the material is a powder material required in powder metallurgy, which weighing device is used for weighing and/or transporting the powder material.

11. A press is characterized by comprising

The weighing apparatus of any one of claims 1 to 10.