CN112453740A - Manufacturing process of outer protective cover numerical control machine tool body - Google Patents
Manufacturing process of outer protective cover numerical control machine tool body Download PDFInfo
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- CN112453740A CN112453740A CN202011267180.1A CN202011267180A CN112453740A CN 112453740 A CN112453740 A CN 112453740A CN 202011267180 A CN202011267180 A CN 202011267180A CN 112453740 A CN112453740 A CN 112453740A
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- China
- Prior art keywords
- welding
- machine tool
- tool body
- protective cover
- lathe bed
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/013—Arc cutting, gouging, scarfing or desurfacing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a manufacturing process of a numerically-controlled machine tool body of an outer protective cover, which comprises the following steps of; firstly, performing welding pretreatment on each component of a machine tool body of a protective cover; welding each component of the machine tool body of the protective cover, selecting proper welding materials according to the welding method and the welding materials of each component of the machine tool body, and selecting proper technological parameters for welding; and step three, immediately coating a layer of anti-oxidation coating on the workpiece after welding, putting the workpiece into a furnace, heating the workpiece to 600-700 ℃, filling 98% of inert gas into the furnace, degassing for 3-5 minutes, vacuumizing the furnace to 0.03-0.05MPa, preserving heat for 18-24 hours, and cooling the workpiece along with the furnace to obtain the lathe bed. The lathe bed prepared by the invention has the advantages of high rigidity, high wear resistance, low stress, oxidation resistance and corrosion resistance, internal stress reduction, good comprehensive performance and better processing performance, and the preparation process is simple, the equipment investment is low, and the production cost is low.
Description
Technical Field
The invention relates to the technical field of numerical control machine tools, in particular to a manufacturing process of a numerical control machine tool body of an outer protective cover.
Background
The numerical control machine tool is a high-precision automatic machine tool, the bed of the numerical control machine tool is an important part for supporting various machining components, the casting method of iron castings of the bed of the numerical control machine tool is sand casting commonly used, and then a special casting method is adopted, for example: metal mold casting, investment casting, gypsum mold casting, and the like. The sand casting can be divided into clay sand mold, organic binder sand mold, resin self-hardening sand mold, lost foam and the like;
with the development of the machine tool industry, due to the difference of machine tool design, the requirements of various production enterprises on materials are diversified, the machine tool body needs high rigidity, high wear resistance, low stress and good comprehensive performance, and the technical indexes of various performances must be stably controlled to achieve better processing performance, so that a new manufacturing process of the machine tool body is needed to meet the processing requirements.
Disclosure of Invention
The invention aims to provide a manufacturing process of a numerically-controlled machine tool body with an outer protective cover, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a manufacturing process of a numerically-controlled machine tool body with an outer protective cover comprises the following steps;
firstly, performing welding pretreatment on each component of a machine tool body of a protective cover;
(1) the defects on each component of the lathe bed are completely removed by methods such as machining, carbon arc gouging and the like according to the size;
(2) removing oil stains, iron rust and other impurities on each component of the lathe bed until the to-be-welded part is exposed with gloss;
(3) overall preheating or local preheating is selected according to the volume, the wall thickness and the structural complexity of each component (except a guide rail) of the lathe bed;
welding each component of the machine tool body of the protective cover, selecting proper welding materials according to the welding method and the welding materials of each component of the machine tool body, and selecting proper technological parameters for welding;
step three, immediately coating a layer of anti-oxidation coating on the workpiece after welding, placing the workpiece in a furnace, heating the workpiece to 600-700 ℃, filling 98% of inert gas into the furnace, degassing for 3-5 minutes, vacuumizing the furnace to 0.03-0.05MPa, preserving heat for 18-24 hours, and cooling the workpiece along with the furnace to obtain a lathe bed;
fourthly, placing the lathe bed on a gantry mill, correcting four points to be equal in height and longitudinally parallel through a round bar, finely milling two end surfaces, processing a connecting screw hole according to the guide rail surface reference, and processing a glue filling cavity and a glue filling hole on the end surface of the lathe bed;
and fifthly, placing the lathe bed on a ground rail through a sizing block, adjusting the concavity and the distortion of a guide rail of the lathe bed according to the precision requirement, and locking a sizing block screw for glue pouring.
Preferably, in the step one (3), the assemblies with high rigidity and complex structures at the repair welding positions are integrally preheated, and when the defects are small, the assemblies positioned at the corners are locally preheated.
Preferably, the global preheating and the local preheating are both preheated by increasing 10-15 ℃ every 3 minutes from a starting temperature of 35 ℃.
Preferably, in the second step, the welding is thermal welding or semi-thermal welding, wherein the preheating temperature for thermal welding is 500-600 ℃, and the preheating temperature for semi-thermal welding is 380-420 ℃.
Preferably, in the second step, the temperature during welding cannot be lower than the temperature for preheating each component of the lathe bed.
Preferably, the hot welding or the semi-hot welding adopts long arc and large current welding, and the technology comprises short section welding, intermittent welding and dispersion welding, wherein each section is about 20-50mm in length, the short section welding is performed intermittently, the welding is stopped for a moment after one section is welded, after each assembly of the lathe bed is recovered to the preheating temperature, the next welding line is welded again to prevent heat concentration, the dispersion welding is performed, and the welding is performed on one part and then on the other part to reduce temperature difference and stress.
Preferably, in the third step, the inert gas is any one of helium, neon, argon and krypton.
Preferably, in the fifth step, the glue filling cavity, the glue filling hole, the adhesive sealing strip and the connecting hole are required to be cleaned and sealed before glue filling.
The manufacturing process of the outer protective cover numerical control machine tool body provided by the invention has the beneficial effects that:
1. the steel skeleton of the lathe bed is formed by welding all components, the adopted welding process can greatly reduce the tensile stress peak value of a welding line, thereby being beneficial to preventing the generation of welding line cracks, optimizing the defect problems of sand holes, air holes, cracks, scratches, defect deformation and the like of all components of the lathe bed in the production process, forming internal stress in the lathe bed, eliminating the internal stress of the lathe bed by carrying out heat treatment on the lathe bed, improving the stability of the lathe bed, and avoiding the problems of distortion, deformation and the like of the lathe bed in the use process;
2. the lathe bed prepared by the invention has high rigidity, high wear resistance, low stress, oxidation resistance and corrosion resistance, reduces internal stress, has good comprehensive performance, positions the guide rail and the lathe bed in a glue pouring mode, improves the assembly precision of the guide rail so as to achieve better processing performance, and has the advantages of simple preparation process, less equipment investment and lower production cost.
Detailed Description
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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1, the present invention provides a technical solution: a manufacturing process of a numerically-controlled machine tool body with an outer protective cover comprises the following steps;
firstly, performing welding pretreatment on each component of a machine tool body of a protective cover;
(1) the defects on each component of the lathe bed are completely removed by methods such as machining, carbon arc gouging and the like according to the size;
(2) removing oil stains, iron rust and other impurities on each component of the lathe bed until the to-be-welded part is exposed with gloss;
(3) overall preheating or local preheating is selected according to the volume, the wall thickness and the structural complexity of each component (except a guide rail) of the lathe bed, wherein the components with high welding position rigidity and complex structure are selected to be integrally preheated, when the defects are small, the components positioned at the corners are locally preheated, and the overall preheating and the local preheating are preheated in a mode of increasing the temperature by 12 ℃ every 3 minutes from the initial temperature of 35 ℃;
welding each component of the machine tool body of the protective cover machine tool, selecting proper welding materials according to a welding method and welding materials of each component of the machine tool body, and selecting proper technological parameters for welding, wherein the welding is hot welding or semi-hot welding, the preheating temperature of the hot welding is 560 ℃, the preheating temperature of the semi-hot welding is 400 ℃, the temperature in the welding process cannot be lower than the preheating temperature of each component of the machine tool body, the hot welding or the semi-hot welding adopts long-arc and large-current welding, the technology comprises short-section welding, intermittent welding and dispersion welding, the length of each section is about 40mm, the intermittent welding is stopped for a moment after one section of welding, and when each component of the machine tool body returns to the preheating temperature, the next welding line is welded to prevent heat concentration and dispersion welding, and the welding is carried out on one part and then on the other part to reduce temperature difference and stress;
step three, immediately coating a layer of anti-oxidation coating on the workpiece after welding, putting the workpiece into a furnace, heating the workpiece to 650 ℃, filling helium with the purity of 98% into the furnace, degassing for 3-5 minutes, vacuumizing the furnace to 0.035MPa, preserving heat for 20 hours, and cooling the workpiece along with the furnace to obtain a lathe bed;
fourthly, placing the lathe bed on a gantry mill, correcting four points to be equal in height and longitudinally parallel through a round bar, finely milling two end surfaces, processing a connecting screw hole according to the guide rail surface reference, and processing a glue filling cavity and a glue filling hole on the end surface of the lathe bed;
and fifthly, placing the lathe bed on a ground rail through a sizing block, adjusting the concavity and distortion of a guide rail of the lathe bed according to the precision requirement, locking a sizing block screw for glue filling, and cleaning a glue filling cavity, a glue filling hole, a bonding sealing strip and a connecting hole for sealing before glue filling.
Embodiment 2, the present invention provides a technical solution: a manufacturing process of a numerically-controlled machine tool body with an outer protective cover comprises the following steps;
firstly, performing welding pretreatment on each component of a machine tool body of a protective cover;
(1) the defects on each component of the lathe bed are completely removed by methods such as machining, carbon arc gouging and the like according to the size;
(2) removing oil stains, iron rust and other impurities on each component of the lathe bed until the to-be-welded part is exposed with gloss;
(3) overall preheating or local preheating is selected according to the volume, the wall thickness and the structural complexity of each component (except a guide rail) of the lathe bed, wherein the components with high welding position rigidity and complex structure are selected to be integrally preheated, when the defects are small, the components positioned at the corners are locally preheated, and the overall preheating and the local preheating are preheated in a mode of increasing the temperature to 13 ℃ every 3 minutes from the initial temperature of 35 ℃;
welding each component of the machine tool body of the protective cover machine tool, selecting proper welding materials according to the welding method and the welding materials of each component of the machine tool body, and selecting proper technological parameters for welding, wherein the welding is thermal welding or semi-thermal welding, the preheating temperature of the thermal welding is 555 ℃, the preheating temperature of the semi-thermal welding is 395 ℃, the temperature in the welding process cannot be lower than the preheating temperature of each component of the machine tool body, the thermal welding or the semi-thermal welding adopts long arc and heavy current welding, the technology comprises short section welding, intermittent welding and dispersion welding, the short section welding is about 45mm long in each section, the intermittent welding is stopped for a moment after one section of welding, and when each component of the machine tool body is recovered to the preheating temperature, the next welding line is welded to prevent heat concentration and dispersion welding, and the welding is carried out on one part and then on the other part to reduce temperature difference and stress;
step three, immediately coating a layer of anti-oxidation coating on the workpiece after welding, putting the workpiece into a furnace, heating the workpiece to 680 ℃, filling argon with the purity of 98% into the furnace, degassing for 3-5 minutes, vacuumizing the furnace to 0.04MPa, preserving heat for 22 hours, and cooling the workpiece along with the furnace to obtain a lathe bed;
fourthly, placing the lathe bed on a gantry mill, correcting four points to be equal in height and longitudinally parallel through a round bar, finely milling two end surfaces, processing a connecting screw hole according to the guide rail surface reference, and processing a glue filling cavity and a glue filling hole on the end surface of the lathe bed;
and fifthly, placing the lathe bed on a ground rail through a sizing block, adjusting the concavity and distortion of a guide rail of the lathe bed according to the precision requirement, locking a sizing block screw for glue filling, and cleaning a glue filling cavity, a glue filling hole, a bonding sealing strip and a connecting hole for sealing before glue filling.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The manufacturing process of the outer protective cover numerical control machine tool body is characterized in that: comprises the following steps;
firstly, performing welding pretreatment on each component of a machine tool body of a protective cover;
(1) the defects on each component of the lathe bed are completely removed by methods such as machining, carbon arc gouging and the like according to the size;
(2) removing oil stains, iron rust and other impurities on each component of the lathe bed until the to-be-welded part is exposed with gloss;
(3) overall preheating or local preheating is selected according to the volume, the wall thickness and the structural complexity of each component (except a guide rail) of the lathe bed;
welding each component of the machine tool body of the protective cover, selecting proper welding materials according to the welding method and the welding materials of each component of the machine tool body, and selecting proper technological parameters for welding;
step three, immediately coating a layer of anti-oxidation coating on the workpiece after welding, placing the workpiece in a furnace, heating the workpiece to 600-700 ℃, filling 98% of inert gas into the furnace, degassing for 3-5 minutes, vacuumizing the furnace to 0.03-0.05MPa, preserving heat for 18-24 hours, and cooling the workpiece along with the furnace to obtain a lathe bed;
fourthly, placing the lathe bed on a gantry mill, correcting four points to be equal in height and longitudinally parallel through a round bar, finely milling two end surfaces, processing a connecting screw hole according to the guide rail surface reference, and processing a glue filling cavity and a glue filling hole on the end surface of the lathe bed;
and fifthly, placing the lathe bed on a ground rail through a sizing block, adjusting the concavity and the distortion of a guide rail of the lathe bed according to the precision requirement, and locking a sizing block screw for glue pouring.
2. The manufacturing process of the outer protective cover numerically-controlled machine tool body according to claim 1, characterized in that: in the step one (3), the assemblies with high rigidity and complex structures at the repair welding positions are integrally preheated, and when the defects are small, the assemblies positioned at the corners are locally preheated.
3. The manufacturing process of the outer protective cover numerically-controlled machine tool body according to claim 2, characterized in that: the overall preheating and the local preheating are both preheated by increasing the temperature from 35 at intervals of 3 minutes to 10-15 ℃.
4. The manufacturing process of the outer protective cover numerically-controlled machine tool body according to claim 1, characterized in that: in the second step, the welding is thermal welding or semi-thermal welding, wherein the preheating temperature of the thermal welding is 500-600 ℃, and the preheating temperature of the semi-thermal welding is 380-420 ℃.
5. The manufacturing process of the outer protective cover numerically-controlled machine tool body according to claim 4, characterized in that: in the second step, the temperature in the welding process cannot be lower than the preheating temperature of each component of the lathe bed.
6. The manufacturing process of the outer protective cover numerically-controlled machine tool body according to claim 4, characterized in that: the hot welding or semi-hot welding adopts long arc and large current welding, and the technology comprises short section welding, intermittent welding and dispersion welding, wherein each section is about 20-50mm long, the welding is performed intermittently, the welding is stopped for a moment after one section, after each component of the lathe bed is recovered to the preheating temperature, the next welding line is welded to prevent heat concentration, the dispersion welding is performed, and the welding is performed on one part and then on the other part to reduce temperature difference and stress.
7. The manufacturing process of the outer protective cover numerically-controlled machine tool body according to claim 1, characterized in that: in the third step, the inert gas is any one of helium, neon, argon and krypton.
8. The manufacturing process of the outer protective cover numerically-controlled machine tool body according to claim 1, characterized in that: and step five, before glue pouring, the glue pouring cavity and the glue pouring hole need to be cleaned, and the sealing strip and the connecting hole need to be pasted for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011267180.1A CN112453740A (en) | 2020-11-13 | 2020-11-13 | Manufacturing process of outer protective cover numerical control machine tool body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011267180.1A CN112453740A (en) | 2020-11-13 | 2020-11-13 | Manufacturing process of outer protective cover numerical control machine tool body |
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| CN112453740A true CN112453740A (en) | 2021-03-09 |
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| US5189279A (en) * | 1991-12-30 | 1993-02-23 | General Electric Company | Steam turbine rotor welding |
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| CN105728963A (en) * | 2014-12-09 | 2016-07-06 | 重庆金国凯畅机床厂 | Repair welding technology for grey cast iron |
| CN107382142A (en) * | 2017-08-21 | 2017-11-24 | 福建省正丰数控科技有限公司 | One kind filling casting bed piece and its manufacture method |
| CN108788775A (en) * | 2018-08-03 | 2018-11-13 | 重庆宏钢数控机床有限公司 | A kind of manufacture craft of outer protective cover bed piece |
| CN110560941A (en) * | 2019-08-05 | 2019-12-13 | 沃得精机(中国)有限公司 | assembling and welding process for open press body |
-
2020
- 2020-11-13 CN CN202011267180.1A patent/CN112453740A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| US5189279A (en) * | 1991-12-30 | 1993-02-23 | General Electric Company | Steam turbine rotor welding |
| CN102615512A (en) * | 2011-05-12 | 2012-08-01 | 纽威数控装备（苏州）有限公司 | Installation method for machine tool workbench |
| CN105728963A (en) * | 2014-12-09 | 2016-07-06 | 重庆金国凯畅机床厂 | Repair welding technology for grey cast iron |
| CN107382142A (en) * | 2017-08-21 | 2017-11-24 | 福建省正丰数控科技有限公司 | One kind filling casting bed piece and its manufacture method |
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| CN110560941A (en) * | 2019-08-05 | 2019-12-13 | 沃得精机(中国)有限公司 | assembling and welding process for open press body |
Non-Patent Citations (3)
| Title |
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Application publication date: 20210309 |