阅读说明：本技术 一种塑胶件折弯方法 (Plastic part bending method ) 是由 焦刚勇 刘庆平 周健伟 王搏圣 王亦伟 倪军 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种塑胶件折弯方法,包括步骤：提供待折弯的塑胶件,塑胶件上预加工有直角缺口以及位于直角缺口两侧的第一定位孔和第二定位孔；将塑胶件放置在工件放置基座上,其中塑胶件通过第一定位孔和第二定位孔与第一定位杆和第二定位杆套接；启动热风组件和冷却组件,其中,热风管对塑胶件的直角缺口部分进行送风加热,冷却组件对工件放置基座进行冷却；加热预设的时间间隔后,关闭热风组件；启动第一驱动机构和折弯辅助机构,其中,第一驱动机构驱动折弯模具朝着塑胶件做直线运动,并对塑胶件的直角缺口部分施加压力,折弯辅助机构驱动第一定位杆和第二定位杆相向运动,以使塑胶件的两端向中部弯折。本发明能够降低能耗和提高生产效率。(The invention discloses a plastic part bending method, which comprises the following steps: providing a plastic part to be bent, and preprocessing a right-angle notch, a first positioning hole and a second positioning hole which are positioned at two sides of the right-angle notch on the plastic part; placing a plastic part on the workpiece placing base, wherein the plastic part is sleeved with the first positioning rod and the second positioning rod through the first positioning hole and the second positioning hole; starting a hot air assembly and a cooling assembly, wherein the hot air pipe supplies air to and heats the right-angle notch part of the plastic part, and the cooling assembly cools the workpiece placing base; after heating for a preset time interval, closing the hot air assembly; the first driving mechanism and the bending auxiliary mechanism are started, wherein the first driving mechanism drives the bending die to move linearly towards the plastic part and applies pressure to the right-angle notch part of the plastic part, and the bending auxiliary mechanism drives the first positioning rod and the second positioning rod to move oppositely so that two ends of the plastic part are bent towards the middle part. The invention can reduce energy consumption and improve production efficiency.)

1. A plastic part bending method is characterized in that based on a plastic part (020) bending device, the plastic part (020) bending device comprises a workbench (100), a workpiece placing base (200), a hot air pipe (300), a bending die (400) and a bending auxiliary mechanism (500), the workpiece placing base (200), the bending die (400) and the bending auxiliary mechanism (500) are all installed on the workbench (100), the workpiece placing base (200) is provided with a cooling assembly and a workpiece bending area (010), the hot air pipe (300) is installed on the workpiece placing base (200) and is connected with the hot air assembly, an air outlet of the hot air pipe (300) faces the workpiece bending area (010), the bending die (400) is located on one side of the workpiece bending area (010), the bending die (400) is connected with a first driving mechanism (410), the auxiliary bending mechanism (500) is located at the bottom of the workpiece placing base (200), a first positioning rod (510) and a second positioning rod (520) are arranged on the auxiliary bending mechanism (500), the first positioning rod (510) and the second positioning rod (520) are respectively located on two sides of the bending die (400), and the plastic part bending method comprises the following steps:

providing a plastic part (020) to be bent, wherein a right-angle notch, a first positioning hole and a second positioning hole are pre-processed on the plastic part (020), and the first positioning hole and the second positioning hole are positioned on two sides of the right-angle notch;

placing the plastic part (020) on the workpiece placing base (200), wherein the plastic part (020) is sleeved with the first positioning rod (510) and the second positioning rod (520) through the first positioning hole and the second positioning hole;

starting the hot air assembly and the cooling assembly, wherein the hot air pipe (300) supplies air to and heats the right-angle notch part of the plastic part (020), and the cooling assembly cools the workpiece placing base (200);

after heating for a preset time interval, closing the hot air assembly;

the first driving mechanism (410) and the auxiliary bending mechanism (500) are started, wherein the first driving mechanism (410) drives the bending die (400) to move linearly towards the plastic part (020) and applies pressure to a right-angle notch part of the plastic part (020), and the auxiliary bending mechanism (500) drives the first positioning rod (510) and the second positioning rod (520) to move oppositely, so that two ends of the plastic part (020) are bent towards the middle.

2. Method for bending a plastic part according to claim 1, wherein the angle between the perpendicular edge of the right-angle notch and the edge of the plastic part (020) is 45 °.

3. The method for bending a plastic part according to claim 2, wherein the corners of the plastic part (020) located at the right-angle notches are rounded.

4. The method for bending a plastic part according to any one of claims 1 to 3, wherein the first positioning holes and the second positioning holes are equidistantly distributed on both sides of the right-angle notch.

5. The method for bending a plastic part according to claim 1, wherein the heating is performed for a predetermined time interval of 5 to 6 seconds.

6. The plastic part bending method according to claim 1, wherein the workpiece placing base (200) comprises a base bottom plate (210) and a workpiece bending template (220), the workpiece bending template (220) is mounted on the base bottom plate (210), and after the first driving mechanism (410) and the bending assisting mechanism (500) are activated, the bending die (400) abuts against and pushes the plastic part (020) until the plastic part (020) abuts against the workpiece bending template (220).

7. The method for bending a plastic part according to claim 6, wherein the workpiece bending template (220) is provided with a right-angle recess (221), and the right-angle recess (221) is adapted to the molded plastic part (020).

8. The method for bending plastic parts according to claim 1, wherein a movable limiting rod (110) is disposed on the worktable (100) and in the workpiece bending region (010), the movable limiting rod (110) is perpendicular to the worktable (100), a third driving mechanism is connected to the movable limiting rod (110), and before the first driving mechanism (410) and the bending auxiliary mechanism (500) are activated, the method further comprises: and starting the third driving mechanism, and driving the movable limiting rod (110) to descend by the third driving mechanism.

Technical Field

The invention relates to the technical field of accessory processing, in particular to a plastic part bending method.

Background

There are some products on the market, including plastic frames with right angles. In the prior art, the plastic frame is generally processed by integrally heating a plastic part to be processed and then bending the plastic part. Because need to the plastic part bulk heating, the power consumption is higher, the consuming time of heating is longer, and machining efficiency is low, and the temperature of the plastic part after bending is higher moreover, need place the cooling, and this just leads to the energy consumption extravagant.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a plastic part bending method which can reduce energy consumption and improve production efficiency.

According to the plastic part bending method of the embodiment of the invention, based on a plastic part bending device, the plastic part bending device comprises a workbench, a workpiece placing base, a hot air pipe, a bending die and a bending auxiliary mechanism, wherein the workpiece placing base, the bending die and the bending auxiliary mechanism are all installed on the workbench, the workpiece placing base is provided with a cooling assembly and a workpiece bending area, the hot air pipe is installed on the workpiece placing base and is connected with a hot air assembly, an air outlet of the hot air pipe faces the workpiece bending area, the bending die is positioned at one side of the workpiece bending area, the bending die is connected with a first driving mechanism, the bending auxiliary mechanism is positioned at the bottom of the workpiece placing base, the bending auxiliary mechanism is provided with a first positioning rod and a second positioning rod, and the first positioning rod and the second positioning rod are respectively positioned at two sides of the bending die, the method for bending the plastic part comprises the following steps:

providing a plastic part to be bent, wherein a right-angle notch, a first positioning hole and a second positioning hole are processed in advance on the plastic part, and the first positioning hole and the second positioning hole are positioned on two sides of the right-angle notch;

placing the plastic part on the workpiece placing base, wherein the plastic part is sleeved with the first positioning rod and the second positioning rod through the first positioning hole and the second positioning hole;

starting the hot air assembly and the cooling assembly, wherein the hot air pipe supplies air to and heats the right-angle notch part of the plastic part, and the cooling assembly cools the workpiece placing base;

after heating for a preset time interval, closing the hot air assembly;

and starting the first driving mechanism and the auxiliary bending mechanism, wherein the first driving mechanism drives the bending die to make linear motion towards the plastic part and applies pressure to the right-angle notch part of the plastic part, and the auxiliary bending mechanism drives the first positioning rod and the second positioning rod to move oppositely so as to bend two ends of the plastic part towards the middle part.

According to the embodiment of the invention, the plastic part bending method at least has the following beneficial effects:

the hot-blast main carries out the air supply heating to the right angle breach part of plastic part, and the heat is concentrated, and the heating region is little, is favorable to reducing the energy consumption and improves heating efficiency, and when the mould of bending was bent the plastic part, the complementary unit that bends can drive first locating lever and second locating lever opposite direction movement to supplementary plastic part is bent, is favorable to improving the efficiency of bending and ensures the effect of bending.

According to some embodiments of the invention, an angle between a right-angle side of the right-angle notch and an edge of the plastic part is 45 °.

According to some embodiments of the present invention, the plastic part is rounded at a corner of the right-angle notch.

According to some embodiments of the invention, the first positioning hole and the second positioning hole are distributed on two sides of the right-angle notch at equal intervals.

According to some embodiments of the invention, the heating is performed for a predetermined time interval of 5 to 6 seconds.

According to some embodiments of the invention, the workpiece placing base comprises a base bottom plate and a workpiece bending template, the workpiece bending template is installed on the base bottom plate, and after the first driving mechanism and the bending auxiliary mechanism are started, the bending mold abuts against and pushes the plastic part until the plastic part abuts against the workpiece bending template.

According to some embodiments of the invention, the workpiece bending template is provided with a right-angle concave position, and the right-angle concave position is adapted to the formed plastic part.

According to some embodiments of the present invention, a movable limiting rod is disposed on the workbench and in the workpiece bending region, the movable limiting rod is perpendicular to the workbench, the movable limiting rod is connected to a third driving mechanism, and before the first driving mechanism and the bending auxiliary mechanism are started, the method further includes: and starting the third driving mechanism, and driving the movable limiting rod to descend by the third driving mechanism.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a plastic part bending apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged partial view of FIG. 1 circled at location A;

fig. 3 is a second schematic structural view of a plastic part bending apparatus according to an embodiment of the present invention;

FIG. 4 is an enlarged fragmentary view of circled location B in FIG. 3;

fig. 5 is an exploded view of a plastic part bending apparatus according to an embodiment of the present invention;

FIG. 6 is a partially enlarged view of a bending assisting mechanism of the plastic part bending apparatus according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a bending mold of the plastic part bending apparatus according to the embodiment of the present invention;

fig. 8 is a flowchart illustrating steps of a method for bending a plastic part according to an embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, "first", "second", and the like are used only for the purpose of distinguishing technical features, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless otherwise explicitly limited, terms such as "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solutions.

Referring to fig. 1, the present embodiment discloses a method for bending a plastic part, which is based on a plastic part bending apparatus. In order to facilitate understanding of the plastic part bending method of the present embodiment, the plastic part bending apparatus of the present embodiment is described below. Referring to fig. 1 and 2, or referring to fig. 3 and 4, the present embodiment discloses a plastic part bending apparatus, including a workbench 100, a workpiece placing base 200, a hot air duct 300, a bending mold 400, and a bending auxiliary mechanism 500, wherein the workpiece placing base 200 is installed on the workbench 100, the workpiece placing base 200 is provided with a cooling component (not shown) and a workpiece bending region 010, the hot air duct 300 is installed on the workpiece placing base 200 and connected with a hot air component (not shown), an air outlet of the hot air duct 300 faces the workpiece bending region 010, the bending mold 400 is installed on the workbench 100 and located at one side of the workpiece bending region 010, the bending mold 400 can move linearly towards or away from the workpiece bending region 010 to enter or leave the workpiece bending region 010, the bending mold 400 is connected with a first driving mechanism 410, referring to fig. 5 and 6, the bending auxiliary mechanism 500 is installed on the workbench 100, and is located the bottom of the workpiece placing base 200, and the auxiliary bending mechanism 500 is provided with a first positioning rod 510 and a second positioning rod 520, and the first positioning rod 510 and the second positioning rod 520 are respectively located at two sides of the bending die 400, and can move in opposite directions or in a back-to-back direction.

Please mix tragedy in fig. 2 and fig. 4, when in use, place the plastic part 020 of treating processing on the base 200 is placed to the work piece, and fix a position fixedly through first locating lever 510 and second locating lever 520, hot-blast main 300 can treat the part of bending and heat, the heat is concentrated, the heating region is little, be favorable to reducing the energy consumption and improving heating efficiency, when mould 400 of bending is bent plastic part 020, auxiliary mechanism 500 of bending can drive first locating lever 510 and second locating lever 520 and move in opposite directions, thereby assist plastic part 020 and bend, be favorable to improving the efficiency of bending and ensure the effect of bending. It should be noted that, in the process of heating the plastic part 020, the heat dissipation can lead to the workpiece placing base 200 to be heated, and therefore, the cooling assembly is used for cooling the workpiece placing base 200, so as to avoid the temperature of the workpiece placing base 200 from being too high.

Referring to fig. 5, the workpiece placing base 200 includes a base plate 210 and a workpiece bending template 220, a first extending portion 211 and a second extending portion 212 are respectively disposed on two sides of the base plate 210, an avoiding region between the first extending portion 211 and the second extending portion 212 is used as a workpiece bending region 010, the workpiece bending template 220 is mounted on the base plate 210 and is adapted to the workpiece bending region 010, a right-angle recess 221 (as shown in fig. 7) is disposed on the workpiece bending template 220, and the right-angle recess 221 is adapted to a shape of a formed workpiece. When bending is performed, the bending die 400 enters the workpiece bending area 010 under the driving of the first driving mechanism 410, and bends the plastic part 020 to be processed, so that the plastic part 020 can be quickly formed.

Referring to fig. 5, the workpiece bending mold 220 is provided with a first fixing block 231 and a second fixing block 232, a first slide block 233 is disposed between the first fixing block 231 and the second fixing block 232, and the hot air duct 300 is mounted on the first slide block 233. The first slider 233 is slidably connected to the first fixing block 231 and the second fixing block 232, so that the position of the first slider 233 can be flexibly adjusted, thereby facilitating the adjustment of the position of the hot air duct 300. It should be noted that an included angle, for example, 30 °, 40 ° or 45 °, is formed between the hot air pipe 300 and the horizontal plane, so as to be aligned with the plastic part 020 to be processed, reduce heat dissipation, and improve heat utilization rate.

An avoidance cavity (not shown) is formed in the bottom of the base bottom plate 210, and the bending auxiliary mechanism 500 is located in the avoidance cavity, so that the space is saved sufficiently, and the size of the device is reduced.

Referring to fig. 5 and 6, the auxiliary bending mechanism 500 includes a second driving mechanism (not shown), a first movable arm 530 and a second movable arm 540, a fixing rod 550 perpendicular to the worktable 100 is installed on an output shaft of the second driving mechanism, specifically, the fixing rod 550 is inserted into a guide hole provided on the worktable 100, and the second driving mechanism is located below the worktable 100. The second driving mechanism can drive the fixed rod 550 to move towards or away from the workpiece bending region 010, the first end of the first movable arm 530 and the second end of the second movable arm 540 are both rotatably connected with the fixed rod 550, the first positioning rod 510 is mounted at the second end of the first movable arm 530, and the second positioning rod 520 is mounted at the second end of the second movable arm 540. When the plastic part 020 to be processed is bent, the second driving mechanism drives the fixed rod 550 to move away from the workpiece bending region 010, so as to drive the first movable arm 530 and the second movable arm 540 to move. Because the workpiece bending template 220 is provided with the right-angle concave position 221, the right-angle concave position 221 plays a guiding role in the moving direction of the first positioning rod 510 and the second positioning rod 520, the first positioning rod 510 and the second positioning rod 520 move oppositely along the edge of the right-angle concave position 221, and pull force is applied to two ends of the plastic part 020, so that the plastic part 020 is assisted to be bent.

Referring to fig. 6, a movable limiting rod 110 is disposed on the worktable 100 and in the workpiece bending region 010, the movable limiting rod 110 is perpendicular to the worktable 100, and the movable limiting rod 110 is connected to a third driving mechanism. Referring to fig. 2, before bending, the movable limiting rod 110 has a positioning and limiting effect on the plastic part 020, referring to fig. 4, after the plastic part 020 is heated, the movable limiting rod 110 moves downward under the driving of the third driving mechanism, so that a bending track of the plastic part 020 is avoided, and misoperation prevention is facilitated.

Referring to fig. 5 and fig. 6, a first guide block 120 and a second guide block 130 are disposed on the workbench 100 and located at one side of the workpiece bending region 010, a second slider 140 is installed between the first guide block 120 and the second guide block 130, a bending die 400 is installed at one side of the second slider 140 adjacent to the workpiece bending region 010, and the bending die 400 is connected to the first driving mechanism 410 through the second slider 140. The first guide block 120 and the second guide block 130 can limit and guide the second slider 140, so that the bending die 400 can accurately bend the plastic part 020 to be processed.

In order to facilitate the replacement of the mold, the bending mold 400 is detachably connected to the second slider 140, for example, the bending mold 400 is connected to the second slider 140 by means of clamping, for example, the bending mold 400 is connected to the second slider 140 by means of a threaded fastener, and of course, the bending mold 400 may be connected to the second slider 140 by means of clamping and a threaded fastener.

Referring to fig. 7, the bending mold 400 includes a first right-angle pressing plate 401 and a second right-angle pressing plate 402 disposed up and down, the area of the first right-angle pressing plate 401 is larger than that of the second right-angle pressing plate 402, and the first right-angle pressing plate 401 is closer to the workpiece bending region 010 than the second right-angle pressing plate 402. First right angle clamp plate 401 and second right angle clamp plate 402 adapt to respectively in the upside edge and the downside edge of the plastic part 020 of treating processing, exert pressure to plastic part 020 through the right angle part of first right angle clamp plate 401 and second right angle clamp plate 402, and cooperation work piece template 220 of bending can make the plastic part 020 the shaping of bending fast.

Referring to fig. 8, the method for bending a plastic part of the present embodiment includes steps S100 to S500, wherein the steps are specifically expressed as follows:

s100, referring to FIG. 2, providing a plastic part 020 to be bent, wherein a right-angle notch, a first positioning hole and a second positioning hole are pre-processed on the plastic part 020, and are positioned on two sides of the right-angle notch;

s200, please continue to refer to fig. 2, placing a plastic part 020 on the workpiece placing base 200, wherein the plastic part 020 is sleeved with the first positioning rod 510 and the second positioning rod 520 through the first positioning hole and the second positioning hole;

s300, starting a hot air assembly and a cooling assembly, wherein the hot air pipe 300 supplies air to and heats the right-angle notch part of the plastic part 020, and the cooling assembly cools the workpiece placing base 200;

s400, after heating for a preset time interval, closing the hot air assembly;

s500, referring to fig. 4, the first driving mechanism 410 and the auxiliary bending mechanism 500 are started, wherein the first driving mechanism 410 drives the bending mold 400 to move linearly toward the plastic part 020 and applies pressure to the right-angle notch of the plastic part 020, and the auxiliary bending mechanism 500 drives the first positioning rod 510 and the second positioning rod 520 to move oppositely, so as to bend the two ends of the plastic part 020 toward the middle.

Hot-blast main 300 carries out the air supply heating to the right angle breach part of plastic part 020, and the heat is concentrated, and the heating region is little, is favorable to reducing the energy consumption and improves heating efficiency, when mould 400 of bending is bent plastic part 020, and the complementary unit 500 of bending can drive first locating lever 510 and second locating lever 520 motion in opposite directions to supplementary plastic part 020 is bent, is favorable to improving the efficiency of bending and ensures the effect of bending.

Specifically, referring to fig. 2, an included angle between the right-angled edge of the right-angled notch and the edge of the plastic part 020 is 45 °, and in the bending process, the right-angled edge of the right-angled notch can deform toward the central line of the right-angled notch, so as to form a right angle after bending.

In order to facilitate the processing and improve the intensity of plastic part 020, the corner processing that just is located the right angle breach on the plastic part 020 has the fillet, and the opening degree of depth of right angle breach can be reduced to the fillet to improve the joint strength of plastic part 020 in the right angle breach part. First locating hole and second locating hole equidistance distribute in the both sides of right angle breach, exert tensile in-process at first locating lever 510 and second locating lever 520 to plastic part 020, can ensure that the both ends atress of plastic part 020 is even, avoids leading to the angle of buckling to be not conform to the requirement because of one end atress is too big.

In this embodiment, the preset heating time interval is 5-6 seconds, and since the hot air delivered from the hot air pipe 300 is concentrated in heat and has a small heating area, the heating time can be shortened, the heating efficiency can be improved, and the heating energy consumption can be reduced.

Referring to fig. 5 and 7, the workpiece placing base 200 includes a base bottom plate 210 and a workpiece bending template 220, the workpiece bending template 220 is installed on the base bottom plate 210, after the first driving mechanism 410 and the bending auxiliary mechanism 500 are started, the bending mold 400 abuts against and pushes the plastic part 020 until the plastic part 020 abuts against the workpiece bending template 220, the bending mold 400 cooperates with the workpiece bending template 220 to bend and shape the plastic part 020, which is beneficial to improving the stability of the plastic part 020 in bending and shaping. Specifically, the workpiece bending template 220 is provided with a right-angle concave position 221, and the right-angle concave position 221 is adapted to the molded plastic part 020.

In this embodiment, the movable limiting rod 110 is disposed on the working table 100 and in the workpiece bending region 010, the movable limiting rod 110 is perpendicular to the working table 100, the movable limiting rod 110 is connected to a third driving mechanism, and before the first driving mechanism 410 and the bending auxiliary mechanism 500 are started, the method further includes: the third driving mechanism is started, the third driving mechanism drives the movable limiting rod 110 to descend, the bending movement track of the plastic part 020 can be avoided, and misoperation prevention is facilitated.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.