CN111266833A - Steel bushing press-fitting device for plastic part and press-fitting method thereof - Google Patents
Steel bushing press-fitting device for plastic part and press-fitting method thereof Download PDFInfo
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- CN111266833A CN111266833A CN202010217055.3A CN202010217055A CN111266833A CN 111266833 A CN111266833 A CN 111266833A CN 202010217055 A CN202010217055 A CN 202010217055A CN 111266833 A CN111266833 A CN 111266833A
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- rod
- ejector rod
- lower ejector
- press
- centering
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 229920003023 plastic Polymers 0.000 title claims abstract description 18
- 239000004033 plastic Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 238000001746 injection moulding Methods 0.000 abstract description 6
- 238000012797 qualification Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 3
- 210000004907 gland Anatomy 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Abstract
The invention provides a steel sleeve press-fitting device for a plastic part and a press-fitting method thereof, wherein the press-fitting device comprises an upper pressing mechanism and an upper jacking mechanism matched with the upper pressing mechanism, the upper pressing mechanism comprises a centering rod arranged in a shell, the upper end of the centering rod is connected with an upper air cylinder, an upper pressing plate seat is sleeved outside the lower end of the centering rod, a guide sleeve is arranged between the upper pressing plate seat and the centering rod, and an O-shaped ring is arranged between the guide sleeve and the centering rod; the upper ejection mechanism comprises a lower ejector rod with the top in a convex arrangement, the lower ejector rod is connected with a cylinder arranged below the lower ejector rod through a base, the bottom of the lower ejector rod is arranged in the base, a lower ejector rod fixing seat is sleeved in the middle of the lower ejector rod, and an O-shaped ring is arranged between the lower ejector rod fixing seat and the lower ejector rod. The device can ensure that the steel sleeve can be smoothly pressed and mounted in place for a product with larger deviation of the hole position of the injection molding part, thereby reducing the machine-down time caused by the fact that the steel sleeve is not pressed, improving the utilization rate of equipment, and simultaneously, the qualification rate of the pressed and mounted product is high, and the quality requirement is met.
Description
Technical Field
The invention relates to a steel sleeve press-fitting device for plastic parts and a press-fitting method thereof.
Background
In order to increase the strength of the injection molding part assembling hole, a steel sleeve is required to be pressed in the hole after injection molding. The existing steel bushing press-fitting device is shown in figures 1-2, a steel bushing 3 is sleeved at the head of an ejector rod 2, a product 4 is arranged on a product fixing plate 1, a hole of the product is ensured to be right above the steel bushing, a jig descends, an upper pressure rod 6 presses the product 4 downwards, an air cylinder connected with the bottom of the ejector rod moves the ejector rod towards the upper pressure rod 6 until the ejector rod 2 extends out of the steel bushing 3 and then is pressed into a corresponding product hole. Generally, the lower bottom plate and the product fixing plate 1 are fixed, the upper bottom plate and the lower bottom plate are supported by a plane bearing, a radial gap is reserved between a lower plate mounting bush and an upper bottom plate mounting hole, and the gap size B between the ejector rod 2 and the ejector rod guide bush 5 is smaller than the steel sleeve chamfer size A. Therefore, when the deviation of the position degree of the upper hole of the product is less than or equal to B, the ejector rod 2 can self-adaptively align the hole position and smoothly press-fit into the steel sleeve.
However, for some injection molded parts with larger sizes, the shrinkage deformation is large after the injection molding of the product, and the position degree of the measuring hole of the injection molded part can also cause the product deviation, so that the existing mechanism can not ensure that the steel sleeve is accurately pressed into the hole. For example, a PP container with a dimension of 875mm by 293mm by 183mm in length, width and height will experience a large shrinkage deformation after injection molding, and will actually measure a deviation of +/-1.5mm in hole position. The product chamfer size is 0.45, steel bushing chamfer size 0.2, and the chamfer size is far less than the hole position degree deviation, so current mechanism can't guarantee the steel bushing pressure equipment downthehole.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a steel sleeve press-fitting device for a plastic part and a press-fitting method thereof.
The purpose of the invention is realized by the following technical scheme:
the steel sleeve press-fitting device for the plastic part comprises an upper pressing mechanism and an upper jacking mechanism, wherein the upper jacking mechanism is matched with the upper pressing mechanism and arranged below the upper pressing mechanism;
the upper ejection mechanism comprises a lower ejector rod with the top in a convex arrangement, the lower ejector rod is connected with a cylinder arranged below the lower ejector rod through a base, the bottom of the lower ejector rod is arranged in the base, a lower ejector rod fixing seat is sleeved in the middle of the lower ejector rod, an O-shaped ring is arranged between the lower ejector rod fixing seat and the lower ejector rod, and the cylinder moves to drive the lower ejector rod to move up and down.
Preferably, a floating joint is arranged between the centering rod and the upper cylinder.
Preferably, the upper and lower parts of the guide sleeve are respectively provided with a plane bearing which is abutted against the upper pressure plate seat and the centering rod.
Preferably, a press-fitting groove is formed in the head of the centering rod, and an outer ring of the press-fitting groove is chamfered.
Preferably, the upper portion of the lower ejector rod fixing seat is abutted to the lower ejector rod through a plane bearing, the plane bearing is arranged below the lower ejector rod fixing seat, the plane bearing is provided with only one cover plate, the cover plate is provided with a groove, and a ball is embedded in the groove.
Preferably, the top of lower ejector pin is the chamfer setting, just the chamfer is greater than to well core rod's chamfer.
Preferably, the diameter of the top of the lower ejector rod is smaller than the inner diameter of the press-fitting groove, and the top of the lower ejector rod is in clearance fit with the press-fitting groove.
Preferably, two O-shaped rings are arranged on the pair of central rods and the upper ejector rod.
Preferably, the chamfer angle of the centering rod is larger than the position deviation of the product hole to be pressed, and the chamfer angle of the upper ejector rod is larger than the position deviation of the product hole.
Preferably, the press-fitting method of the steel sleeve press-fitting device for plastic parts, which is described in any one of the above, includes the following steps:
s1, placing the steel sleeve at the head of the lower ejector rod, wherein the air cylinder is in a retraction state, placing a product on equipment, the product hole is positioned above the lower ejector rod, and the O-shaped ring on the centering rod ensures that the centering rod is positioned at the center of the guide sleeve at the beginning;
s2, the upper cylinder drives the centering rod to move, and the centering rod is inserted into the product hole through chamfer guiding;
and S3, after the steel sleeve is completely pressed into the product hole, the cylinder moves to drive the lower ejector rod to firstly enter the press-fitting groove of the centering rod, the lower ejector rod is ensured to be smoothly inserted into the press-fitting groove of the centering rod and to be concentric by matching with the O-shaped ring and the planar bearing of the upper ejector mechanism, the lower ejector rod continuously moves upwards to push the centering rod to ascend until the steel sleeve is completely pressed into the product hole.
The invention has the beneficial effects that: the device can ensure that the steel sleeve can be smoothly pressed and installed in place for a product with large deviation of the position degree of the injection molding piece hole, so that the machine halt time caused by the fact that the steel sleeve is not pressed is reduced, the equipment utilization rate is improved, and meanwhile, the qualified rate of pressed and installed products is high, and the quality requirement is met.
Drawings
FIG. 1: the structure of the prior art is schematic.
FIG. 2: fig. 1 is a partial schematic view of the structure.
FIG. 3: the invention discloses a schematic three-dimensional structure of a pressing mechanism.
FIG. 4: the cross section structure of the pressing mechanism is schematic.
FIG. 5: the invention discloses a schematic three-dimensional structure of a top lifting mechanism.
FIG. 6: the invention discloses a cross-sectional structure schematic diagram of a jacking mechanism.
FIG. 7: the invention relates to a plane bearing structure front view.
FIG. 8: the invention is illustrated in cross-section A-A in FIG. 7.
FIG. 9: the invention is embodied in a schematic structure.
Detailed Description
The invention discloses a steel sleeve press-fitting device for plastic parts and a press-fitting method thereof, and the press-fitting device comprises an upper pressing mechanism and an upper jacking mechanism which is matched with the upper pressing mechanism and arranged below the upper pressing mechanism, and is shown in figures 3-9. The pressing mechanism comprises a centering rod 1 arranged in a shell, a pressing groove is formed in the head of the centering rod 1, the outer ring of the pressing groove is in a chamfer angle arrangement, the chamfer angle is 1.5mm, and the groove diameter of the pressing groove is equivalent to the hole diameter of a product to be pressed.
The upper end of the centering rod 1 is connected with the upper cylinder 2 through the floating joint 3, and the lower end of the centering rod 1 is sleeved with the guide sleeve 7 and the upper pressure plate seat 8 respectively. The air cylinder 2 drives the center rod 1 to move up and down in the upper pressure plate seat 8, so that a certain gap is compressed and released through the O-shaped rings 6. In order to reduce the friction resistance to radial deviation when the central rod 1 moves, the upper part and the lower part of the guide sleeve 7 are respectively provided with a plane bearing 5 which is abutted against the upper pressure plate seat 8 and the central rod 1. An upper pressure plate 9 is arranged below the upper pressure plate seat 8. For the displacement change that the pressfitting product in-process produced among the cooperation technical scheme, planar bearing 13 has carried out corresponding improvement, and it includes a gland 131, seted up the recess on gland 131, the recess embeds is equipped with ball 132.
Go up top mechanism and include that the top is the lower ejector pin 11 of convex setting, the top of lower ejector pin 11 is the chamfer setting, just the chamfer is greater than the chamfer to well core rod. In this embodiment, the chamfer is 2.0 mm. The convex head is used for placing the steel sleeve 15. The diameter of the top of the lower ejector rod is smaller than the inner diameter of the press-fitting groove, and the sum of the diameter of the top and the thickness of the steel sleeve is equal to the aperture of the product to be press-fitted. The lower ejector rod 11 is connected with a cylinder 17 arranged below the lower ejector rod 11 through a base 16, and a cylinder shaft of the cylinder 17 is connected with the bottom of the base 16. Specifically, the bottom of the lower ejector rod 11 is arranged in the base 16, a lower ejector rod fixing seat 12 is arranged above the base 16, and the lower ejector rod fixing seat 12 is sleeved in the middle of the lower ejector rod 11. A lower ejector rod O-shaped ring 14 is arranged between the lower ejector rod fixing seat 12 and the lower ejector rod 11, and the air cylinder 17 moves to drive the base and the whole lower ejector rod 11 to move up and down. Similarly, in order to ensure the sealing performance and release the gap during movement, two lower ejector rod O-shaped rings 14 are arranged. The thrust of the cylinder of the upper jacking mechanism is greater than that of the upper cylinder of the lower pressing mechanism.
And lower ejector rod plane bearings 13 are arranged above and below the lower ejector rod fixing seat 12. Wherein, the upper lower top rod plane bearing 13 is abutted with the upper part of the lower top rod 13, and the lower top rod plane bearing 13 is arranged in the base 16.
The press-fitting process of the present invention is described below in conjunction with fig. 7;
in operation, the steel sleeve 15 is arranged at the head of the lower mandril 11, and at the moment, the air cylinder is in a retraction state. The product 10 is placed on the apparatus with the product hole above the lower ejector pin 11. The upper cylinder 2 drives the centering rod 1 to move, and the centering rod 1 is inserted into a product hole through chamfer guiding. The O-shaped ring on the centering rod is ensured to be in the center of the guide sleeve when the centering rod is initially inserted into the product hole, and when the centering rod is inserted into the product hole, the O-shaped ring can be easily compressed to release a gap. Two plane bearings in the pressing mechanism reduce the friction resistance to radial deviation of the centering rod, ensure that the centering rod is smoothly inserted into the product hole, and ensure that the product hole and the centering rod are coaxial.
After the centering rod is in place, the air cylinder moves to drive the lower ejector rod to firstly enter the press-fitting groove of the centering rod, the upper ejection mechanism is also provided with two O-shaped rings and a plane bearing, and the action of the upper ejection mechanism is consistent with that of the lower ejection mechanism, so that the lower ejector rod is ensured to be smoothly inserted into the press-fitting groove of the centering rod and to be concentric. The aim of aligning the steel sleeve and the product hole to the center is finally achieved through the alignment conversion of the center rod. Because the thrust of the upper ejection mechanism cylinder is greater than that of the lower pressing mechanism, the lower ejection rod continuously moves upwards to push the central rod to ascend until the steel sleeve is completely pressed into the product hole.
Meanwhile, the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. Steel bushing pressure equipment device for the working of plastics, its characterized in that: the pneumatic pressing mechanism comprises an upper pressing mechanism and an upper jacking mechanism which is matched with the upper pressing mechanism and arranged below the upper pressing mechanism, wherein the upper pressing mechanism comprises a centering rod arranged in a shell, the upper end of the centering rod is connected with an upper air cylinder, an upper pressing plate seat is sleeved outside the lower end of the centering rod, a guide sleeve is arranged between the upper pressing plate seat and the centering rod, an O-shaped ring is arranged between the guide sleeve and the centering rod, and the upper air cylinder drives the centering rod to move up and down in the upper pressing plate seat;
the upper ejection mechanism comprises a lower ejector rod with the top in a convex arrangement, the lower ejector rod is connected with a cylinder arranged below the lower ejector rod through a base, the bottom of the lower ejector rod is arranged in the base, a lower ejector rod fixing seat is sleeved in the middle of the lower ejector rod, an O-shaped ring is arranged between the lower ejector rod fixing seat and the lower ejector rod, and the cylinder moves to drive the lower ejector rod to move up and down.
2. A steel bushing press-fitting device for plastic members as claimed in claim 1, wherein: and a floating joint is arranged between the centering rod and the upper cylinder.
3. A steel bushing apparatus for plastic members as claimed in claim 2, wherein: and the upper part and the lower part of the guide sleeve are respectively provided with a plane bearing, an upper pressure plate seat and a centering rod which are abutted.
4. A steel bushing press-fitting device for plastic members as claimed in claim 1, wherein: a press-fitting groove is formed in the head of the centering rod, and the outer ring of the press-fitting groove is in a chamfer shape.
5. A steel bushing apparatus for plastic members as claimed in claim 4, wherein: the upper portion of the lower ejector rod fixing seat is abutted to the lower ejector rod through a plane bearing, the plane bearing is arranged below the lower ejector rod fixing seat, the plane bearing is provided with only one cover plate, the cover plate is provided with a groove, and a ball is embedded in the groove.
6. A steel bushing apparatus for plastic members as claimed in claim 5, wherein: the top of ejector pin is the chamfer setting down, just the chamfer is greater than the chamfer to well core rod.
7. A steel bushing apparatus for plastic members as claimed in claim 5, wherein: the diameter of the top of the lower ejector rod is smaller than the inner diameter of the press mounting groove, and the top of the lower ejector rod is in clearance fit with the press mounting groove.
8. A steel bushing device for plastic members as claimed in claim 3, wherein: and two O-shaped rings are arranged on the centering rod and the upper ejector rod.
9. A steel bushing device for plastic members as claimed in claim 3, wherein: the chamfer angle of the centering rod is larger than the position deviation of the product hole to be pressed, and the chamfer angle of the upper ejector rod is larger than the position deviation of the product hole.
10. A press-fitting method of a steel sleeve press-fitting device for plastic members as claimed in any one of claims 1 to 9, wherein: the method comprises the following steps:
s1, placing the steel sleeve at the head of the lower ejector rod, wherein the air cylinder is in a retraction state, placing a product on equipment, the product hole is positioned above the lower ejector rod, and the O-shaped ring on the centering rod ensures that the centering rod is positioned at the center of the guide sleeve at the beginning;
s2, the upper cylinder drives the centering rod to move, and the centering rod is inserted into the product hole through chamfer guiding;
and S3, after the steel sleeve is completely pressed into the product hole, the cylinder moves to drive the lower ejector rod to firstly enter the press-fitting groove of the centering rod, the lower ejector rod is ensured to be smoothly inserted into the press-fitting groove of the centering rod and to be concentric by matching with the O-shaped ring and the planar bearing of the upper ejector mechanism, the lower ejector rod continuously moves upwards to push the centering rod to ascend until the steel sleeve is completely pressed into the product hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010217055.3A CN111266833A (en) | 2020-03-25 | 2020-03-25 | Steel bushing press-fitting device for plastic part and press-fitting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010217055.3A CN111266833A (en) | 2020-03-25 | 2020-03-25 | Steel bushing press-fitting device for plastic part and press-fitting method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111266833A true CN111266833A (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010217055.3A Pending CN111266833A (en) | 2020-03-25 | 2020-03-25 | Steel bushing press-fitting device for plastic part and press-fitting method thereof |
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| CN (1) | CN111266833A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10315065A (en) * | 1997-05-19 | 1998-12-02 | Honda Motor Co Ltd | Press-in device for bearing |
| JP2002233917A (en) * | 2001-02-01 | 2002-08-20 | Honda Motor Co Ltd | Bearing housing, circlip mounting method for bearing, and mounting device for it |
| CN103447804A (en) * | 2013-09-25 | 2013-12-18 | 十堰达博科工贸有限公司 | Pressure head device capable of automatically correcting center positioning deviation |
| CN105382513A (en) * | 2015-11-24 | 2016-03-09 | 河南省西峡汽车水泵股份有限公司 | Water seal assembling device and method for engine cooling water pump |
| CN205184205U (en) * | 2015-12-17 | 2016-04-27 | 湖北楚粤自动化科技有限公司 | Automatic adjust pressure equipment device well |
| CN107598528A (en) * | 2017-10-19 | 2018-01-19 | 武汉联航机电有限公司 | A kind of floating type pressing machine |
| CN208992130U (en) * | 2018-11-06 | 2019-06-18 | 中信戴卡股份有限公司 | A kind of knuckle steel bushing extrusion tooling |
| CN212552590U (en) * | 2020-03-25 | 2021-02-19 | 劳士领汽车配件（昆山）有限公司 | Steel bushing press fitting device for plastic part |
-
2020
- 2020-03-25 CN CN202010217055.3A patent/CN111266833A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10315065A (en) * | 1997-05-19 | 1998-12-02 | Honda Motor Co Ltd | Press-in device for bearing |
| JP2002233917A (en) * | 2001-02-01 | 2002-08-20 | Honda Motor Co Ltd | Bearing housing, circlip mounting method for bearing, and mounting device for it |
| CN103447804A (en) * | 2013-09-25 | 2013-12-18 | 十堰达博科工贸有限公司 | Pressure head device capable of automatically correcting center positioning deviation |
| CN105382513A (en) * | 2015-11-24 | 2016-03-09 | 河南省西峡汽车水泵股份有限公司 | Water seal assembling device and method for engine cooling water pump |
| CN205184205U (en) * | 2015-12-17 | 2016-04-27 | 湖北楚粤自动化科技有限公司 | Automatic adjust pressure equipment device well |
| CN107598528A (en) * | 2017-10-19 | 2018-01-19 | 武汉联航机电有限公司 | A kind of floating type pressing machine |
| CN208992130U (en) * | 2018-11-06 | 2019-06-18 | 中信戴卡股份有限公司 | A kind of knuckle steel bushing extrusion tooling |
| CN212552590U (en) * | 2020-03-25 | 2021-02-19 | 劳士领汽车配件（昆山）有限公司 | Steel bushing press fitting device for plastic part |
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