Assembly machining process for guide column and guide sleeve

Abstract

The invention discloses an assembling and machining process for a guide column and a guide sleeve, and belongs to the technical field of guide structure machining. Evaluating the contact uniformity of the guide plate and the guide block by adopting a coloring method; then, the periphery of the side wall of the guide column is coated with blue lead, a machine tool is started to descend to the bottom in a non-pressure mode, rapid curing glue is poured into a gap between the guide sleeve and the guide column, after the rapid curing glue is solidified, re-pressing is conducted, and the contact state of the guide column and the current guide sleeve is evaluated through a coloring method; the center of a hole in the current guide sleeve is measured, and then a new guide sleeve mounting hole is precisely bored with the center of the hole as the standard; mounting a standard guide sleeve in the new guide sleeve mounting hole, and finally repressing to confirm blue oil coloring of the guide column and the guide sleeve. According to the assembling and machining process for the guide column and the guide sleeve, the matching precision of the guide column and the guide sleeve can be guaranteed. The rapid curing glue has the characteristics of rapid curing, low shrinkage rate, high surface flatness and low viscosity, and is beneficial to improving the assembling and processing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of guide structure processing, and in particular to an assembly processing technology of a guide column and a guide sleeve. Background Art

[0002] During the assembly of precision guide mechanisms such as mold guide pins and guide sleeves, the precise fit of the components must be ensured. During assembly, deviations in the gap between the mold itself (for example, between the upper and lower molds and the machine platform), or eccentricity between the inner center of the guide sleeve and the center of the guide pin, can affect guiding precision. Furthermore, since curing of the glue after injection into the guide sleeve typically takes several hours or even a day, this can lead to lengthy assembly processes and low efficiency.

[0003] Based on this, the present invention designs an assembly process for a guide pin and a guide sleeve to solve the above problems. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides an assembly process for a guide pin and a guide sleeve.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A guide pin and guide sleeve assembly process includes the following steps: Step 1: Ground clearance adjustment, calibrate the gap between the guide sliding surface and the guide plate installation surface; Step 2: Use the coloring method to evaluate the contact uniformity between the guide plate and the guide block, requiring the coloring rate of the guide plate to be ≥a%; Step 3: Install the guide pin on the lower die and apply blue pigment around the side wall of the guide pin. Install the guide sleeve on the upper die. Start the machine tool and slowly lower it to the bottom without pressure, so that the guide pin passes through the guide sleeve. Then, use quick-curing glue to fill the gap between the guide sleeve and the guide pin. After the quick-curing glue solidifies, re-press and use the coloring method to evaluate the contact status between the guide pin and the current guide sleeve. The guide pin must be evenly colored with blue pigment. Measure the center of the hole inside the current guide sleeve, and then precision bore the new guide sleeve installation hole based on the center of the hole. Step 4: Install the standard guide sleeve in the new guide sleeve mounting hole, apply blue pigment around the side wall of the guide post, start the machine tool and slowly lower it to the bottom without pressure. The guide post coloring rate is required to be greater than b%.

[0006] Furthermore, in step one, the guide plate is fixed on the side of the lower die, the guide block is installed on the side of the upper die and is located corresponding to the left and right of the guide plate, and the guide sliding surface is located on the working side of the guide plate, which is the surface that directly contacts the guide block and produces relative sliding; the gap between the guide sliding surface and the guide plate mounting surface is precisely measured by the gauge block, and at the same time, the silicon steel gasket is adjusted to control the single-sided gap between the guide plate and the guide sliding surface within the tolerance band of 0.03mm~0.05mm.

[0007] Furthermore, a=80.

[0008] Furthermore, b=75.

[0009] Furthermore, the fast-curing glue is composed of component A and component B, and the mass ratio of component A to component B is 100:28~34; The component A is composed of the following components in parts by weight: 100-125 parts of alicyclic epoxy resin, 22-35 parts of polyether modified epoxy resin, 4-6 parts of diluent, 7-15 parts of silane coupling agent modified nano-silica, and 3-5 parts of leveling agent; The component B is composed of the following components in parts by weight: 35-42 parts of lignin-modified acid anhydride curing agent, 8-12 parts of isophorone diamine, and 1-4 parts of magnesium fluorosilicate.

[0010] Furthermore, the alicyclic epoxy resin is obtained by mixing vinylcyclohexene diepoxide and 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexylcarboxylate in a mass ratio of 3 to 5:1; Furthermore, nano-silica is modified with a silane coupling agent: 10 to 20 parts of nano-silica is added to 50 to 88 parts of anhydrous ethanol to obtain a silica suspension; 0.4 to 0.6 parts of KH550 are dissolved in 4 to 8 parts of anhydrous ethanol, glacial acetic acid is slowly added dropwise to adjust the pH to 4 to 4.5, and the mixture is stirred and hydrolyzed for 25 to 40 minutes to obtain a silane hydrolyzate; the silica suspension is slowly added to the silane hydrolyzate, and the mixture is stirred and grafted at 55 to 62°C for 2 to 3 hours.

[0011] Furthermore, the lignin-modified acid anhydride curing agent is a mixture of lignin, glutaric anhydride and sebacic acid according to a molar ratio of 0.05~0.3:1:0.8~1.2; specifically, after mixing glutaric anhydride and sebacic acid, the mixture is placed at 52~54°C and a speed of 1000~2000r / min and stirred for 45~60min to obtain an intermediate product, and then lignin is added, the temperature is raised to 55~58°C, and the speed is stirred at 500~800r / min for 2~3h to obtain the intermediate product.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The assembly process of the guide post and the guide sleeve of the present invention can ensure the matching accuracy of the guide post and the guide sleeve.

[0013] The fast-curing glue of the present invention has the following advantages: Fast curing: The curing time at room temperature is less than 2 hours, which is beneficial to significantly shorten the assembly process time and improve the assembly process efficiency.

[0014] Low shrinkage (<0.2%): Small volume change during curing, ensuring stability and accuracy of subsequent processing.

[0015] High surface flatness: After the glue is cured, the surface is smooth without pores or depressions, avoiding the accuracy of color detection affected by defects in the glue layer.

[0016] Low viscosity (<300cps), good compatibility with blue pigment: after curing, the surface is dense, blue pigment oil can be evenly adhered without penetration. DETAILED DESCRIPTION

[0017] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example 1: In some embodiments, a process for assembling a guide pin and a guide sleeve includes the following steps: Step 1: Ground clearance adjustment, calibrate the gap between the guide sliding surface and the guide plate installation surface; After the mold guide components have passed the finishing inspection, the mold must be fixed horizontally on a high-precision platform to calibrate the gap between the guide surface and the guide plate mounting surface. Specifically, the gap between the guide surface and the guide plate mounting surface is precisely measured using a gauge block, and silicon steel shims are used for adjustment to ensure that the single-sided gap between the guide plate and the guide surface is controlled within the tolerance range of 0.03mm to 0.05mm to meet the kinematic accuracy requirements of the mold sliding pair.

[0019] Among them, the guide plate is fixed on the side of the lower mold, the guide block is installed on the side of the upper mold and is located on the left and right sides corresponding to the guide plate, and the guide sliding surface is located on the working side of the guide plate, which is the surface that directly contacts the guide block and produces relative sliding.

[0020] Step 2: Evaluate the contact uniformity between the guide plate and the guide block; After the mold ground clearance is adjusted and placed on the press, the guide clearance cannot be detected with a feeler gauge due to structural limitations. The coloring method (blue pigment detection) is used to evaluate the contact status between the guide plate and the guide block. The coloring rate of the guide plate is required to be ≥80% to ensure the uniformity of the guidance between the guide plate and the guide block and avoid abnormal wear of the mold caused by local stress concentration.

[0021] Step 3: Install the guide pin on the lower die and apply blue pigment around the side wall of the guide pin, and install the guide sleeve on the upper die; start the machine tool and slowly lower it to the bottom without pressure, so that the guide pin passes through the guide sleeve, and then use quick-curing glue to fill the gap between the guide sleeve and the guide pin. After the quick-curing glue solidifies, re-press and use the coloring method (blue pigment detection) to evaluate the contact status between the guide pin and the current guide sleeve. The guide pin must be evenly colored with blue pigment; measure the center of the hole inside the current guide sleeve, and then use the center of the hole as the reference to fine-boring the new guide sleeve mounting hole into place, so that the correct guide sleeve mounting hole position is formed inside the guide sleeve, thereby ensuring the matching accuracy of the guide pin and guide sleeve in the later stage; Step 4: Install the standard guide sleeve in the new guide sleeve mounting hole, apply blue pigment around the side wall of the guide post, start the machine tool and slowly lower it to the bottom without pressure. The guide post coloring rate is required to be greater than 75% to ensure the uniformity of the guide between the guide post and the standard guide sleeve and avoid abnormal wear.

[0022] The assembly process of the guide post and the guide sleeve of the present invention can ensure the matching accuracy of the guide post and the guide sleeve.

[0023] Example 2: In some embodiments, the fast-curing glue consists of component A and component B, and the mass ratio of component A to component B is 100:28; The component A is composed of the following components in parts by weight: 100 parts of alicyclic epoxy resin, 22 parts of polyether modified epoxy resin, 4 parts of diluent, 7 parts of silane coupling agent modified nano-silica, and 3 parts of leveling agent; The alicyclic epoxy resin is obtained by mixing vinylcyclohexene diepoxide and 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexylcarboxylate in a mass ratio of 3:1; The polyether modified epoxy resin used is CYDW-125.

[0024] The diluent is cardanol glycidyl ether.

[0025] Silane coupling agent modified nano-silica: take 10 parts of nano-silica and put it into 50 parts of anhydrous ethanol to obtain a silica suspension; dissolve 0.4 parts of KH550 in 4 parts of anhydrous ethanol, slowly add glacial acetic acid to adjust the pH to 4, stir and hydrolyze for 25 minutes to obtain a silane hydrolyzate; slowly add the silica suspension to the silane hydrolyzate, place it at 55°C and stir for 2 hours.

[0026] The component B is composed of the following components in parts by weight: 35 parts of lignin-modified acid anhydride curing agent, 8 parts of isophorone diamine, and 1 part of magnesium fluorosilicate.

[0027] The lignin-modified acid anhydride curing agent is a mixture of lignin, glutaric anhydride and sebacic acid in a molar ratio of 0.05:1:0.8; specifically, glutaric anhydride and sebacic acid are mixed, placed at 52°C and 1000 r / min and stirred for 45 minutes to obtain an intermediate product, and then lignin is added, and the mixture is heated to 55°C and stirred at 500 r / min for 2 hours to obtain the intermediate product.

[0028] Example 3: In some embodiments, the fast-curing glue consists of component A and component B, and the mass ratio of component A to component B is 100:34; The component A is composed of the following components in parts by weight: 125 parts of alicyclic epoxy resin, 35 parts of polyether modified epoxy resin, 6 parts of diluent, 15 parts of silane coupling agent modified nano-silica, and 5 parts of leveling agent; The alicyclic epoxy resin is obtained by mixing vinylcyclohexene diepoxide and 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexylcarboxylate in a mass ratio of 5:1; The polyether modified epoxy resin used is CYDW-125.

[0029] The diluent is cardanol glycidyl ether.

[0030] Silane coupling agent modified nano-silica: 20 parts of nano-silica were added to 88 parts of anhydrous ethanol to obtain a silica suspension; 0.6 parts of KH550 were dissolved in 8 parts of anhydrous ethanol, glacial acetic acid was slowly added dropwise to adjust the pH to 4.5, and the mixture was stirred and hydrolyzed for 40 minutes to obtain a silane hydrolyzate; the silica suspension was slowly added to the silane hydrolyzate, and the mixture was stirred and grafted at 62°C for 3 hours.

[0031] The component B is composed of the following components in parts by weight: 42 parts of lignin-modified acid anhydride curing agent, 12 parts of isophorone diamine, and 4 parts of magnesium fluorosilicate.

[0032] The lignin-modified acid anhydride curing agent is a mixture of lignin, glutaric anhydride and sebacic acid in a molar ratio of 0.3:1:1.2; specifically, glutaric anhydride and sebacic acid are mixed, placed at 54°C and 2000 r / min and stirred for 60 minutes to obtain an intermediate product, and then lignin is added, and the mixture is heated to 58°C and stirred at 800 r / min for 3 hours to obtain the intermediate product.

[0033] Example 4: In some embodiments, the fast-curing glue consists of component A and component B, and the mass ratio of component A to component B is 100:30; The component A is composed of the following components in parts by weight: 115 parts of alicyclic epoxy resin, 25 parts of polyether modified epoxy resin, 5 parts of diluent, 10 parts of silane coupling agent modified nano-silica, and 4 parts of leveling agent; The alicyclic epoxy resin is obtained by mixing vinylcyclohexene diepoxide and 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexylcarboxylate in a mass ratio of 4:1; The polyether modified epoxy resin used is CYDW-125.

[0034] The diluent is cardanol glycidyl ether.

[0035] Silane coupling agent modified nano-silica: 17 parts of nano-silica was added to 68 parts of anhydrous ethanol to obtain a silica suspension; 0.5 parts of KH550 was dissolved in 6 parts of anhydrous ethanol, glacial acetic acid was slowly added dropwise to adjust the pH to 4.2, and stirred for hydrolysis for 32 minutes to obtain a silane hydrolyzate; the silica suspension was slowly added to the silane hydrolyzate, and the mixture was stirred and grafted at 58°C for 2.6 hours.

[0036] The component B is composed of the following components in parts by weight: 40 parts of lignin-modified acid anhydride curing agent, 11 parts of isophorone diamine, and 3 parts of magnesium fluorosilicate.

[0037] The lignin-modified acid anhydride curing agent is a mixture of lignin, glutaric anhydride and sebacic acid in a molar ratio of 0.1:1:1; specifically, glutaric anhydride and sebacic acid are mixed, placed at 53°C and a speed of 1800 r / min and stirred for 50 minutes to obtain an intermediate product, and then lignin is added, and the temperature is raised to 56°C and stirred at a speed of 700 r / min for 2.2 hours to obtain the intermediate product.

[0038] Testing the properties of the fast-curing adhesives prepared in Examples 1-3 revealed room-temperature curing times of less than 2 hours, shrinkage of less than 0.2%, and viscosity less than 300 cps. The cured adhesive surface was smooth, free of pores or indentations. The cured surface was dense, allowing for uniform adhesion of the blue pigment without bleed-through.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A guide pin and guide sleeve assembly process, characterized in that: The following steps are involved: Step 1: Ground clearance adjustment, calibrate the gap between the guide sliding surface and the guide plate installation surface; Step 2: Use the coloring method to evaluate the contact uniformity between the guide plate and the guide block, requiring the coloring rate of the guide plate to be ≥a%; Step 3: Install the guide pin on the lower die and apply blue pigment around the side wall of the guide pin. Install the guide sleeve on the upper die. Start the machine tool and slowly lower it to the bottom without pressure, so that the guide pin passes through the guide sleeve. Then, use quick-curing glue to fill the gap between the guide sleeve and the guide pin. After the quick-curing glue solidifies, re-press and use the coloring method to evaluate the contact status between the guide pin and the current guide sleeve. The guide pin must be evenly colored with blue pigment. Measure the center of the hole inside the current guide sleeve, and then precision bore the new guide sleeve installation hole based on the center of the hole. Step 4: Install the standard guide sleeve in the new guide sleeve mounting hole, apply blue pigment around the side wall of the guide column, start the machine tool and slowly lower it to the bottom without pressure. The guide column coloring rate is required to be greater than b%.

2. The assembly process of the guide post and guide sleeve according to claim 1, characterized in that: In step one, the guide plate is fixed on the side of the lower die, the guide block is installed on the side of the upper die and is located corresponding to the left and right of the guide plate, and the guide sliding surface is located on the working side of the guide plate. It is the surface that directly contacts the guide block and produces relative sliding; the gap between the guide sliding surface and the guide plate mounting surface is precisely measured by the gauge block, and at the same time, it is adjusted with the silicon steel gasket. The single-sided gap between the guide plate and the guide sliding surface is controlled within the tolerance range of 0.03mm~0.05mm.

3. The assembly process of the guide post and guide sleeve according to claim 1, characterized in that: a=80。 4. The assembly process of the guide post and guide sleeve according to claim 1, characterized in that: b=75。 5. The assembly process of the guide post and guide sleeve according to claim 1, characterized in that: The fast-curing glue consists of component A and component B, and the mass ratio of component A to component B is 100:28-34; The component A is composed of the following components in parts by weight: 100-125 parts of alicyclic epoxy resin, 22-35 parts of polyether modified epoxy resin, 4-6 parts of diluent, 7-15 parts of silane coupling agent modified nano-silica, and 3-5 parts of leveling agent; The component B is composed of the following components in parts by weight: 35-42 parts of lignin-modified acid anhydride curing agent, 8-12 parts of isophorone diamine, and 1-4 parts of magnesium fluorosilicate.

6. The guide post and guide sleeve assembly process according to claim 5, characterized in that: The alicyclic epoxy resin is obtained by mixing vinylcyclohexene diepoxide and 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexylcarboxylate in a mass ratio of 3 to 5:

1.

7. The assembly process of the guide post and guide sleeve according to claim 5, characterized in that: Silane coupling agent modified nano-silica: take 10-20 parts of nano-silica and put it into 50-88 parts of anhydrous ethanol to obtain a silica suspension; dissolve 0.4-0.6 parts of KH550 in 4-8 parts of anhydrous ethanol, slowly add glacial acetic acid to adjust the pH to 4-4.5, stir and hydrolyze for 25-40 minutes to obtain a silane hydrolyzate; slowly add the silica suspension into the silane hydrolyzate, place it at 55-62°C and stir and graft for 2-3 hours.

8. The guide post and guide sleeve assembly process according to claim 5, characterized in that: The lignin-modified acid anhydride curing agent is a mixture of lignin, glutaric anhydride and sebacic acid in a molar ratio of 0.05-0.3:1:0.8-1.

2. Specifically, glutaric anhydride and sebacic acid are mixed, stirred at 52-54°C and 1000-2000 r / min for 45-60 minutes to obtain an intermediate product, and then lignin is added, and the mixture is heated to 55-58°C and stirred at 500-800 r / min for 2-3 hours to obtain the intermediate product.