CN103273336A

CN103273336A - Fixing structure

Info

Publication number: CN103273336A
Application number: CN2013102178818A
Authority: CN
Inventors: 王春华
Original assignee: SHANGHAI JIGUAN INDUSTRIAL Co Ltd
Current assignee: Zhejiang Jiahong Automobile Technology Co ltd
Priority date: 2013-06-03
Filing date: 2013-06-03
Publication date: 2013-09-04
Anticipated expiration: 2033-06-03
Also published as: CN103273336B

Abstract

The invention provides a fixing structure comprising fastening bolts for processing and fixing of two workpieces. The fixing structure further comprises a fixing socket reserved in a first workpiece, and a positioning hole which is communicated with the fixing socket and reserved in a second workpiece. A pin with a pin bushing is disposed in the positioning hole. The pin bushing is sleeved on the positioning pin. An accommodating space is reserved between the pin bushing and the inner wall of the fixing socket and is filled with glue. The fixing structure has the advantages that pin positioning precision is improved greatly, processing efficiency is improved, production cost, detection cost and labor cost are reduced, and the fixing structure is highly mobile and responds fast.

Description

Fixing structure

Technical Field

The present disclosure relates to fixing structures, and particularly to a fixing structure fixed by a positioning pin.

Background

At present, the fixing mode commonly adopted in the industry of equipment, tools, clamps, jigs and inspection tools is as follows: after the two workpieces are fixed by screws, positioning pin holes are machined manually by using drilling and milling equipment and then matched with positioning pins.

The prior technical scheme has the following defects:

1. because the later period needs the pin to be matched, the pin hole of the workpiece base plate can not be processed in place at one time, thereby wasting time and having low efficiency;

2. the operation on the diameter and the position of the pin hole of the complex curved surface part and the large part has inaccurate processing precision, and frequent repeated processing and repair, which causes low efficiency, and can be completed only by using high-precision equipment, thereby greatly increasing the processing cost;

3. the later manual work is needed, so that the positioning accuracy of the pin is poor, the required accuracy requirement is difficult to achieve, and the repeated positioning performance is extremely poor;

4. when the field needs to be repositioned and maintained, special mechanical equipment is needed, which wastes time and labor.

In view of this, how to improve the pin positioning accuracy, improve the processing efficiency, and reduce the maintenance cost becomes an urgent problem to be solved.

Disclosure of Invention

Aiming at the problems that in the prior art, pin holes of a base plate cannot be processed in place at one time, the efficiency is low, the processing precision is not high, and the repair rate is high, the invention provides a fixing structure.

The invention provides a fixing structure, which comprises a fastening bolt and is used for processing and fixing two workpieces, wherein the fixing structure also comprises a fixing groove arranged on a first workpiece and a positioning hole arranged on a second workpiece and communicated with the fixing groove, a positioning pin with a pin bush is arranged in the positioning hole, the pin bush is sleeved on the positioning pin, an accommodating space is arranged between the pin bush and the inner wall of the fixing groove, and colloid is filled in the accommodating space.

Preferably, the diameter of the positioning hole of the fixing structure is consistent with the diameter of the positioning pin, and the depth of the positioning hole is greater than or equal to the length of the positioning pin;

preferably, the diameter of the positioning pin of the fixing structure is 4mm-20mm, and the diameter of the inner hole of the pin bushing is 4mm-20 mm;

preferably, a pin cover screw is arranged at the top of the positioning pin of the fixing structure;

preferably, the positioning pin of the fixed structure penetrates through the first workpiece and the second workpiece to be connected;

preferably, the pin bush of the fixing structure is disposed in the fixing groove;

preferably, the pin bush of the fixed structure is made of metal material, and the hardness is greater than HRC 50;

preferably, in the fixing structure, the step of fixing the first workpiece and the second workpiece is:

1) processing a fixed groove on the first workpiece, and processing a positioning hole matched with the positioning pin on the second workpiece;

2) after the first workpiece is fixed by a fastening bolt, adjusting the size, and fastening and connecting the first workpiece and the second workpiece;

3) sleeving a pin bush on the positioning pin, screwing a pin cover screw into the top of the positioning pin to form a whole, inserting the whole into a pin hole, and forming an accommodating space between the pin bush and the inner wall of the fixing groove;

4) pouring the colloid into a containing space, standing for more than 12 hours in a space with the temperature of more than 20 ℃ until the colloid is solidified into hard solid;

preferably, the linear distance between the pin bush of the fixing structure and the inner wall of the fixing groove is 1.5mm-10 mm;

preferably, the colloid of the fixed structure is double-component epoxy resin potting A/B glue, and the temperature resistance value is-40-150 ℃.

The fixing device of the invention has the advantages that:

1) the second workpiece body has higher precision and high dimensional precision, so that the replaceability of subsequent parts can be greatly improved, and all related positioning pin holes on the second workpiece can be processed in place at one time;

2) when the machine tool is machined, the precision requirement of the pin positioning hole on the first workpiece is obviously reduced, and the manufacturing cost and the detection cost can be greatly reduced;

3) when related workpieces are matched as pins, mechanical equipment and cutting fluid are not needed, so that the surfaces of the processed workpieces are clean and tidy, and meanwhile, the processing is not influenced by the environment and has stronger maneuverability because the mechanical equipment is not used for matching as pins;

4) because the matched pin is a technical work in the mechanical industry, the improved scheme of the invention can be quickly completed by common workers, and the labor cost is reduced;

5) the matching precision of each part is high, the problem of false pins is avoided, the repeatability and the stability are good, and the replaceability is high. If the position of the part is slightly designed and changed, the part can not be scrapped, and after readjustment and positioning are carried out, glue filling is carried out, so that the cost is saved, and the reaction is rapid.

Drawings

The various aspects of the present invention will become more apparent to the reader after reading the detailed description of the invention with reference to the attached drawings. Wherein,

FIG. 1 shows a schematic view of a fastening mechanism according to the present invention;

FIG. 2 shows a cross-sectional view of a securing mechanism, in accordance with the present invention;

fig. 3 shows a top view of a fixation structure according to the invention.

Detailed Description

In order to more clearly understand the technical contents of the present invention, embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 shows a schematic view of the structure of a fixing mechanism according to the invention, fig. 2 shows a cross-sectional view of a fixing mechanism according to the invention, and fig. 3 shows a top view of a fixing structure according to the invention. Referring to fig. 1, 2 and 3, the fixing structure for processing and fixing two workpieces includes a first workpiece 60, a second workpiece 10, a fastening bolt 90, a positioning pin 20, a rubber body 30, a pin bush 40, a pin cover screw 50, a positioning hole 70, and a fixing groove 80. The fixing groove 80 is arranged on the first workpiece 60, the positioning hole 70 which is the same as the fixing groove 80 is arranged on the second workpiece 10, the positioning pin 20 penetrates through the first workpiece 60 and the second workpiece 10 and is arranged in the positioning hole 70, the diameter of the positioning hole 70 is the same as the diameter of the positioning pin 20, the hole depth is larger than or equal to the length of the positioning pin 20, and the fixing device can be used when a deep hole which cannot be reached by the positioning pin is machined.

The positioning pin 20 is provided with a pin bushing 40 which is sleeved on the positioning pin, the diameter of the positioning pin 20 is 4mm-20mm, the pin bushing 40 is matched with the positioning pin, and the diameter of an inner hole is 4mm-20 mm. The pin bushing 40 is disposed within the retaining groove 80, the bushing being a metallic material having a hardness greater than HRC 50. After the positioning pin 20 with the pin bushing 40 is fixed in the positioning hole 70, an accommodating space 100 with a linear distance of 1.5mm-10mm is formed between the pin bushing 40 and the inner wall of the fixing groove 80, and the accommodating space 100 is used for filling the colloid 30. The dowel 20, in addition to having the dowel bushing 40, is topped with a dowel cover screw 50, which is not limited to material and screw type. The design of pin bush 40 and pin lid screw 50 except improving one shot forming's precision, can also effectively increase the repetitive operation of processing, and the repeatability is strong, and stability is good, and replaceability is high, when meetting the condition that needs do slight adjustment to the spare part position, can not scrap whole part, and the quick accurate readjustment location to keep the clean and tidy of spare part surface, mobility is strong. Meanwhile, the arrangement of the pin cover screw 50 can further improve the convenience and accuracy of the operation of the dowel 20.

The fixing of the first workpiece 60 and the second workpiece 10 by the fixing device of the present invention employs the following steps:

1) processing a fixing groove 80 on a first workpiece 60, processing a positioning hole 70 matched with the aperture and the depth of the positioning pin 20 on a second workpiece 10 by using high-precision equipment according to drawing parameters, wherein the processing precision is executed according to the instruction of a mechanical manual, the aperture of the positioning pin 20 is kept consistent with the diameter of the positioning pin 20, the hole depth is greater than or equal to the length of the positioning pin 20, and the width of the fixing groove 80 is greater than the aperture of the positioning hole 70, so that the positioning precision is improved in the subsequent fixing operation;

2) fixing the first workpiece 60 by using a fastening bolt 90, adjusting the size by using related detection equipment, and fastening and connecting the first workpiece 60 and the second workpiece 10 after meeting the drawing requirements;

3) sleeving the pin bush 40 on the positioning pin 20, screwing the pin cover screw 50 into the top of the positioning pin 20 to form a whole, inserting the whole into the pin hole 70, and forming an accommodating space 100 between the pin bush 40 and the inner wall of the fixing groove 80;

4) the two-component epoxy resin potting A/B glue 30 is uniformly blended and then quickly poured into the accommodating space 100, and stands still for more than 12 hours in a space with the temperature of more than 20 ℃ until the glue is solidified into a hard solid, and the fixing operation is finished.

By adopting the fixing structure, the characteristics of high precision and high dimensional precision of the second workpiece body can be utilized, the replaceability of subsequent parts is greatly improved, and all related positioning pin holes on the second workpiece can be processed in place at one time; when the machine tool is machined, the precision requirement of the pin positioning hole on the first workpiece is obviously reduced, and the manufacturing cost and the detection cost can be greatly reduced; when related workpieces are matched as pins, mechanical equipment and cutting fluid are not needed, so that the surfaces of the processed workpieces are clean and tidy, and meanwhile, the processing is not influenced by the environment and has stronger maneuverability because the mechanical equipment is not used for matching as pins; because the matched pin is a technical work in the mechanical industry, the improved scheme of the invention can be quickly completed by common workers, and the labor cost is reduced; meanwhile, the matching precision of each part is high, the problem of false pins is avoided, the repeatability and the stability are good, and the replacement is high. If the position of the part is slightly designed and changed, the part can not be scrapped, and after readjustment and positioning are carried out, glue filling is carried out, so that the cost is saved, and the reaction is rapid.

The foregoing describes specific embodiments of the present invention. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present invention without departing from the spirit and scope of the invention. Such modifications and substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. The utility model provides a fixed knot constructs, includes fastening bolt for the processing of two work pieces is fixed, its characterized in that, fixed knot constructs still including setting up the fixed slot on first work piece, set up on the second work piece with the communicating locating hole of fixed slot, set up a shop bolt that has the pin bush in the locating hole, the pin bush cover is established on the shop bolt, the pin bush with an accommodation space has between the fixed slot inner wall the colloid is filled to the accommodation space.

2. The fixation structure of claim 1, wherein the diameter of the positioning hole is the same as the diameter of the positioning pin, and the depth of the positioning hole is greater than or equal to the length of the positioning pin.

3. The fixation structure of claim 1, wherein the dowel pin has a diameter of 4mm to 20mm and the dowel bushing bore has a diameter of 4mm to 20 mm.

4. The fixation structure of claim 1, wherein a pin cover screw is provided on top of the dowel.

5. The fixture structure of claim 1, wherein the locating pin extends through the first and second workpieces.

6. The fixation structure of claim 1, wherein the pin bushing is disposed within the fixation slot.

7. The fixation structure of claim 1 or 6, wherein the pin bushing is a metallic material having a hardness greater than HRC 50.

8. The fixture structure of claim 1, wherein the step of securing the first and second workpieces comprises:

1) processing the fixing groove on the first workpiece, and processing the positioning hole matched with the positioning pin on the second workpiece;

2) after the first workpiece is fixed by the fastening bolt, adjusting the size, and fastening and connecting the first workpiece and the second workpiece;

3) sleeving the pin bush on the positioning pin, screwing the pin cover screw into the top of the positioning pin to form a whole, inserting the whole into the pin hole, and forming the accommodating space between the pin bush and the inner wall of the fixing groove;

4) and pouring the colloid into the accommodating space, and standing for more than 12 hours in a space with the temperature of more than 20 ℃ until the colloid is solidified into a hard solid.

9. The fastening structure of claim 8, wherein the linear distance between the pin bushing and the inner wall of the fastening groove is 1.5mm to 10 mm.

10. The fixation structure of claim 1 or 8, wherein the glue is a two-component epoxy resin potting A/B glue having a temperature resistance value of-40 ℃ to 150 ℃.