CN202028935U - Composite fixture for processing matched spigots of motor car bogie axle box upper part - Google Patents
Composite fixture for processing matched spigots of motor car bogie axle box upper part Download PDFInfo
- Publication number
- CN202028935U CN202028935U CN2011200382328U CN201120038232U CN202028935U CN 202028935 U CN202028935 U CN 202028935U CN 2011200382328 U CN2011200382328 U CN 2011200382328U CN 201120038232 U CN201120038232 U CN 201120038232U CN 202028935 U CN202028935 U CN 202028935U
- Authority
- CN
- China
- Prior art keywords
- workpiece
- movable floor
- location
- fixed
- fixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Jigs For Machine Tools (AREA)
Abstract
A composite fixture for processing matched spigots of a motor car bogie axle box upper part employs a rough machined bearing hole as a positioning surface. When a workpiece needs to be installed, firstly a movable bottom plate in a movable fixture is placed on an adjustable fixture, the movable fixture and the adjustable fixture are accurately positioned by two movable bottom plate positioning rods, a workpiece is accurately positioned on the movable fixture by two workpiece positioning rods and fixed by compression screws after being positioned, then the movable fixture is turned over to be installed on a fixed support, and a spacing is reserved between the top surface of each compression screw and a fixed bottom plate. After the movable fixture is fixedly installed, the matched spigots on the workpiece face upwards. Therefore, the workpiece is positioned at a processing center, milling for the matched spigots, lower combined surfaces and lower planes of connecting lugs and form processing for connecting holes can be completed only by clamping once, evenness of wall thicknesses of the matched spigots to two sides of the bearing hole is ensured, the rate of certified workpieces in processing reaches 99.8%, and clamping adjusting time of the composite fixture is 105-120 seconds shorter than that of the prior art.
Description
Technical field:
The utility model relates to the anchor clamps of the axle box upper body processing usefulness of motor car bogie axle box, relates in particular to the anchor clamps that processing motor car bogie axle box upper body cooperates seam.
Background technology:
On motor-car, the motor car bogie axle box is similar to the connecting rod on the diesel engine, it is made up of axle box upper body and axle box lower body, the axle box lower body is equivalent to gonnecting rod body, the axle box upper body is equivalent to connecting rod cap, be formed by connecting by butt joint seam and securing member between the two, described axle box upper body such as Fig. 1, shown in Figure 2, it comprises cartridge housing 11, semicircle dead eye 12, engaging lug seat 13 and cooperation seam 14, cooperate seam 14 to be arranged between the engaging lug seat 13, cooperating the length dimension L of seam 14 is 250 millimeters, the diameter of semicircle dead eye 12 is 240 millimeters, cooperate the minimum wall thickness (MINI W.) of seam 14 to have only 5 millimeters, engaging lug seat 13 is 46 millimeters from cooperating the seam 14 length dimension L1 that stretches out, and the width dimensions L2 of engaging lug seat 13 is 168 millimeters, is provided with two connecting holes 15 on engaging lug seat 13, cooperating the following faying face A of seam is 62 millimeters to the height difference H between the lower plane B of engaging lug seat, and tolerance is 0～-0.03 millimeter.The existing machining process route of this part is:
1. the following faying face A that casts to cooperate seam is a datum level;
2. machining serves as the location benchmark with the upper surface of cartridge housing 11 and engaging lug seat 13, pushes down semicircle dead eye 12; Once finish the processing of the lower plane B of the following faying face A that cooperates seam 14 and cooperate seam, engaging lug seat with machining center;
3. with the connecting hole 15 on the following faying face A processing engaging lug seat 13 that cooperates seam 14 and cooperation seam;
4. will cooperate seam 14 and cooperate the following faying face A of seam to cooperate butt joint with the axle box lower body, and by four connecting holes, 15 usefulness bolts both will be assembled into one, and carry out bore hole processing then, bore hole divides heavy boring, half right boring and right boring.
According to this processing technology, there are two aspect problems:
First, owing to cooperate seam 14 and cooperate the following faying face A of seam and during the lower plane B of engaging lug seat with Cutter Body Processing with Machining Center, be that upper surface with cartridge housing 11 and engaging lug seat 13 is the location benchmark, and this benchmark is inconsistent with the casting benchmark, the surface quality of cartridge housing 11 and engaging lug seat 13 upper surfaces is very poor, cast common shrinkage cavity, shrinkage porosite, defectives such as fleshiness are all concentrated these positions, therefore use them relatively poor as the location baseline stability that cooperates seam 14 processing, in process, cooperate seam 14 to be easy to occur inclined to one side limit phenomenon, statistics according to the applicant, the ratio of semicircle dead eye 12 relative engagement seams 14 off-centre reaches more than 20%, and the percentage of A-class goods of part is not high.
The second, because the ratio on the inclined to one side limit of semicircle dead eye 12 relative engagement seams, 14 generations is higher, make follow-up semicircle dead eye 12 allowance increase, and inhomogeneous, increased the difficulty and the precision of follow-up bore hole processing.
The applicant thinks that by to the existing machinery processing analysis existing mechanical processing technology is reasonable inadequately, should adjust, and explores a rational mechanical processing technique route by the test applicant, and the yield rate of machining reaches 99%～99.8%.
The machining process of described motor car bogie axle box upper body is as follows:
1. be benchmark is found two connecting holes 15 earlier accurately at the upper surface of engaging lug seat C center with the following faying face A that cooperates seam, the center preprocessing at two connecting holes 15 goes out fabrication hole then, and mills out location pit face D; So just realized the unification of casting technique benchmark and mechanical processing technique benchmark, can make the seam wall thickness allowance of semicircle dead eye 12 both sides even, also can make the allowance of semicircle dead eye 12 more even, for follow-up semicircle dead eye 12 roughing, cooperation seam 14 Milling Process provide reliable and stable location benchmark;
2. fabrication hole and the location pit face D with four connecting holes 15 is benchmark, and roughing semicircle dead eye 12 for follow-up cooperation seam 14 Milling Process provide reliable and stable benchmark, guarantees that semicircle dead eye 12 both sides seam wall thickness are even;
3. semicircle dead eye 12 and the connecting hole 15 with roughing is benchmark, finishes the processing of the lower plane B of the following faying face A that cooperates seam 14 and cooperate seam, engaging lug seat with clamping of machining center, and connecting hole 15 is carried out the processing of shape type;
4. will cooperate seam 14 and cooperate the following faying face A of seam to cooperate butt joint with the axle box lower body, by four connecting holes, 15 usefulness bolts both mounts are integral, carry out bore hole processing then, because the allowance of semicircle dead eye 12 is less, and good evenness, therefore can cancel heavy boring, directly carry out the integrated processing of half right boring and right boring.
In processing method of the present utility model, the 3rd step, employed anchor clamps were emphasis of the present utility model,
Also be difficult point,
Those skilled in the art can't obtain without creating work and testing.
The utility model content:
The purpose of this utility model provides the cooperation seam of a kind of motor car bogie axle box upper body and processes compound anchor clamps.
The cooperation seam of described a kind of motor car bogie axle box upper body is processed compound anchor clamps, it is characterized in that: comprise floating holder, transfer the clamping tool, the movable floor locating bar, workpiece location mandril and fixed support, described floating holder comprises movable floor and three cambered surface positioning clamping devices, on movable floor, be provided with two inclined-planes, mid-plane, two mounting planes and three location and installation holes, two inclined-planes are arranged on the left side of movable floor symmetrically, two mounting planes are arranged on the right side of movable floor symmetrically, on two mounting planes, respectively be provided with a location and installation hole, on the mid-plane of the left side of movable floor section, be provided with a location and installation hole, two cambered surface positioning clamping devices are arranged on two inclined-planes of left side section symmetrically with respect to the width centreline of movable floor, a cambered surface positioning clamping device is arranged on the mid-plane of the right section of movable floor, described cambered surface positioning clamping device is by the sphere alignment pin, " 7 " font clamping arm and housing screw are formed, the sphere alignment pin is fixed on the movable floor, wherein, two sphere alignment pins are fixed on two inclined-planes of left end on the movable floor, a sphere alignment pin is fixed on the right-hand member of the mid-plane on the movable floor, being provided with on the bore area of position to the semicircle dead eye two ends of living workpiece of three sphere alignment pins, wherein, the housing screw spinning and is on the same straight line with the sphere alignment pin on " 7 " font clamping arm; Described accent clamping tool comprises transfers the dress base plate, three portable plate set pin sleeves and two workpiece set pin sleeves, three portable plate set pin sleeves and two workpiece set pin sleeves all are fixed on to be transferred on the dress base plate, three portable plate set pin sleeves that the position is set is corresponding with three location and installation holes on the movable floor, two workpiece set pin sleeves that the position is set is corresponding with the connecting hole on the workpiece, two movable floor locating bars are sleeved in the location and installation hole and portable plate set pin sleeve on the movable floor, realize floating holder and transfer the clamping tool accurately to locate, two workpiece location mandrils insert respectively in the connecting hole and workpiece set pin sleeve on the workpiece, the realization workpiece is accurately located on floating holder, and workpiece accurately screws housing screw behind the location; Described fixed support is made up of two high columns, short column and fixed base plate, two high columns and a short column all are fixed on the fixed base plate, the distributing position of three root posts is corresponding with three location and installation holes on the movable floor, center at every root post all is provided with screwed hole, two mounting planes and mid-plane on the movable floor of floating holder set aside on three root posts, and fix with the location trip bolt, after the floating holder fixed installation, cooperation seam on the workpiece to be processed up, the housing screw end face has the gap between the fixed base plate.Promptly can start this moment machining center finish successively to cooperate seam and cooperate seam following faying face, engaging lug seat lower plane and connecting hole carried out the processing of shape type.
Because it is benchmark that mechanical processing technique has adopted the following faying face to cooperate seam, find the center of two connecting holes earlier accurately in the upper surface of engaging lug seat, go out fabrication hole in the preprocessing of the center of two connecting holes then, and mill out location pit face; So just realized the unification of casting technique benchmark and mechanical processing technique benchmark, can make the seam wall thickness allowance of semicircle dead eye both sides even, also can make the allowance of semicircle dead eye more even, for follow-up semicircle dead eye roughing, cooperation seam Milling Process provide reliable and stable benchmark; Fabrication hole and location pit face with four connecting holes is benchmark then, and roughing semicircle dead eye for follow-up cooperation seam Milling Process provides reliable and stable benchmark, guarantees that semicircle dead eye both sides seam wall thickness is even; Semicircle dead eye and connecting hole with roughing is benchmark again, finishes the processing of the lower plane of the following faying face that cooperates seam and cooperate seam, engaging lug seat with clamping of machining center, and connecting hole is carried out the processing of shape type; Last again to cooperate seam and to cooperate the following faying face of seam to cooperate butt joint with the axle box lower body, with bolt both are assembled into one by four connecting holes, carry out bore hole processing then, because the few and good evenness of allowance of semicircle dead eye, therefore can cancel heavy boring, directly carry out the integrated processing of half right boring and right boring.By test, according to machining process route of the present utility model, the yield rate of machining reaches 99%～99.8%.
Work in-process heart processing workshop section, design the cooperation seam and processed compound anchor clamps, this special fixture has selected semicircle dead eye through roughing as locating surface, earlier the movable floor in the floating holder is shelved on when workpiece is installed and transfers on the clamping tool, in location and installation hole and the portable plate set pin sleeve on the accent clamping tool on two movable floor locating bars insertion movable floors, floating holder is accurately located with transferring the clamping tool, insert in the connecting hole and the workpiece set pin sleeve on the accent clamping tool of workpiece by two workpiece location mandrils again, the realization workpiece is accurately located on floating holder, workpiece accurately screws housing screw behind the location, and then floating holder stood up, two mounting planes on the movable floor and mid-plane are set aside on three root posts on the fixed support, and fix with the location trip bolt, after the floating holder fixed installation, cooperation seam on the workpiece to be processed up, the housing screw end face has the gap between the fixed base plate.Like this, the workpiece work in-process in the heart, as long as clamping just can be finished the Milling Process to the last plane of the following faying face that cooperates seam, cooperation seam, engaging lug seat successively, can also carry out the processing of shape type to connecting hole, guarantee to cooperate seam even to the wall thickness of semicircle dead eye both sides, can not produce asymmetric situation, use checking through reality, adopt this sleeve clamp, the workpiece work in-process operation processing percentage of A-class goods in the heart reaches 99%～99.8%, and clamping is adjusted time ratio prior art shortening 105 seconds～120 seconds simultaneously.
Description of drawings:
Fig. 1, Fig. 2 are workpiece to be machined (axle box upper body) topology example figure;
Fig. 2 is the upward view of Fig. 1;
Fig. 3, Fig. 4 are floating holder and the structural representation of transferring the clamping tool to cooperate in the utility model;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5, Fig. 6 are floating holder and support bracket fastened annexation schematic diagram;
Fig. 6 is the vertical view of Fig. 5;
Fig. 7～Figure 10 is the structural representation of floating holder;
Wherein, Fig. 7 is a front view; Fig. 8 is an E-E cutaway view among Fig. 7;
Fig. 9 is the vertical view (dismounting housing screw) of Fig. 7; Figure 10 is a F-F cutaway view among Fig. 9;
Figure 11, Figure 12 are for transferring the structural representation of clamping tool; Figure 12 is the vertical view of Figure 11;
Figure 13, Figure 14 are support bracket fastened structural representation; Figure 14 is the vertical view of Figure 13;
Among the figure: the 1-workpiece; The 2-floating holder; 3-transfers the clamping tool; 4-movable floor locating bar; 5-workpiece location mandril; The 6-fixed support; 7-locatees trip bolt; The 11-cartridge housing; 12-semicircle dead eye; 13-engaging lug seat; 14-cooperates seam; The 15-connecting hole; A-cooperates the following faying face of seam; The lower plane of B-engaging lug seat; The upper surface of C-engaging lug seat; D-location pit face; The 21-movable floor; The 211-inclined-plane; The 212-mid-plane; The 213-mounting plane; 214-location and installation hole; 22-cambered surface positioning clamping device; 221-sphere alignment pin; The 222-clamping arm; The 223-housing screw; 31-transfers the dress base plate; 32-portable plate set pin sleeve; 33-workpiece set pin sleeve; The high column of 61-; The short column of 62-; The 63-fixed base plate.
The specific embodiment:
Introduce the specific embodiment of the present utility model in detail below in conjunction with accompanying drawing:
The compound anchor clamps of cooperation seam milling of a kind of motor car bogie axle box described in the utility model upper body, comprise floating holder 2, transfer clamping tool 3, movable floor locating bar 4, workpiece location mandril 5 and fixed support 6, as Fig. 3～shown in Figure 6, described floating holder 2 comprises movable floor 21 and three cambered surface positioning clamping devices 22, on movable floor 21, be provided with two inclined-planes 211, mid-plane 212, two mounting planes 213 and three location and installation holes 214, two inclined-planes 211 are arranged on the left side of movable floor 21 symmetrically, two mounting planes 213 are arranged on the right side of movable floor 21 symmetrically, on two mounting planes 213, respectively be provided with a location and installation hole 214, on the mid-plane 212 of the left side of movable floor 21 section, be provided with a location and installation hole 214, two cambered surface positioning clamping devices 22 are arranged on two inclined-planes 211 of left side section symmetrically with respect to the width centreline of movable floor 21, a cambered surface positioning clamping device 22 is arranged on the mid-plane 212 of movable floor 21 right sections, described cambered surface positioning clamping device 22 is by sphere alignment pin 221, " 7 " font clamping arm 222 and housing screw 223 are formed, sphere alignment pin 221 is fixed on the movable floor 21, wherein, two sphere alignment pins 221 are fixed on two inclined-planes 211 of left end on the movable floor 21, a sphere alignment pin 221 is fixed on the right-hand member of the mid-plane 212 on the movable floor 21, being provided with on the bore area of position to semicircle dead eye 12 two ends of living workpiece 1 of three sphere alignment pins 221, wherein, housing screw 223 spinnings are on " 7 " font clamping arm 222, and be on the same straight line with sphere alignment pin 221, shown in Fig. 7～10; Described accent clamping tool 3 comprises transfers dress base plate 31, three portable plate set pin sleeves 32 and two workpiece set pin sleeves 33, as Figure 11, shown in Figure 12, three portable plate set pin sleeves 32 and two workpiece set pin sleeves 33 all are fixed on to be transferred on the dress base plate 31, three portable plate set pin sleeves 32 that the position is set is corresponding with three location and installation holes 214 on the movable floor 21, two workpiece set pin sleeves 33 that the position is set is corresponding with the connecting hole 15 on the workpiece 1, two movable floor locating bars 4 are sleeved in the location and installation hole 214 and portable plate set pin sleeve 32 on the movable floor 21, realize floating holder 2 and transfer accurately location of clamping tool 3, two workpiece location mandrils 5 insert respectively in the connecting hole 15 and workpiece set pin sleeve 33 on the workpiece 1, realization workpiece 1 is accurately located on floating holder 2, workpiece 1 accurately screws housing screw 223 behind the location, as Fig. 3, shown in Figure 4; Described fixed support 6 is by two high columns 61, short column 62 and fixed base plate 63 are formed, as Figure 13, shown in Figure 14, two high columns 61 and a short column 62 all are fixed on the fixed base plate 63, the distributing position of three root posts is corresponding with three location and installation holes 214 on the movable floor 21, center at every root post all is provided with screwed hole, two mounting planes 213 and mid-plane 212 on the movable floor 21 of floating holder 2 set aside on three root posts, and it is fixing with location trip bolt 7, after floating holder 2 fixed installations, cooperation seam 14 on the workpiece to be processed 1 up, housing screw 223 end faces have the gap between fixed base plate 63.
Promptly can start after workpiece install to finish machining center finish successively to cooperate seam 14 and cooperate seam following faying face A, engaging lug seat lower plane B and connecting hole 15 carried out the processing of shape type.
Claims (1)
1. the cooperation seam of a motor car bogie axle box upper body is processed compound anchor clamps, it is characterized in that: it comprises floating holder (2), transfer clamping tool (3), movable floor locating bar (4), workpiece location mandril (5) and fixed support (6), described floating holder (2) comprises movable floor (21) and three cambered surface positioning clamping devices (22), on movable floor (21), be provided with two inclined-planes (211), mid-plane (212), two mounting planes (213) and three location and installation holes (214), two inclined-planes (211) are arranged on the left side of movable floor (21) symmetrically, two mounting planes (213) are arranged on the right side of movable floor (21) symmetrically, on two mounting planes (213), respectively be provided with a location and installation hole (214), on the mid-plane (212) of the left side of movable floor (21) section, be provided with a location and installation hole (214), two cambered surface positioning clamping devices (22) are arranged on two inclined-planes (211) of left side section symmetrically with respect to the width centreline of movable floor (21), a cambered surface positioning clamping device (22) is arranged on the mid-plane (212) of the right section of movable floor (21), described cambered surface positioning clamping device (22) is by sphere alignment pin (221), " 7 " font clamping arm (222) and housing screw (223) are formed, sphere alignment pin (221) is fixed on the movable floor (21), wherein, two sphere alignment pins (221) are fixed on movable floor (21) and go up on two inclined-planes (211) of left end, a sphere alignment pin (221) is fixed on the right-hand member that movable floor (21) is gone up mid-plane (212), being provided with on the bore area of position to semicircle dead eye (12) two ends of living workpiece (1) of three sphere alignment pins (221), wherein, housing screw (223) spinning and is on the same straight line with sphere alignment pin (221) on " 7 " font clamping arm (222); Described accent clamping tool (3) comprises transfers dress base plate (31), three portable plate set pin sleeves (32) and two workpiece set pin sleeves (33), three portable plate set pin sleeves (32) and two workpiece set pin sleeves (33) all are fixed on to be transferred on the dress base plate (31), three portable plate set pin sleeves (32) that the position is set is corresponding with three the location and installation holes (214) on the movable floor (21), two workpiece set pin sleeves (33) that the position is set is corresponding with the connecting hole (15) on the workpiece (1), two movable floor locating bars (4) are sleeved in the location and installation hole (214) and portable plate set pin sleeve (32) on the movable floor (21), realize floating holder (2) and transfer accurately location of clamping tool (3), two workpiece location mandrils (5) insert respectively in the connecting hole (15) and workpiece set pin sleeve (33) on the workpiece (1), realize workpiece (1) in the upward accurate location of floating holder (2), workpiece (1) accurately screws housing screw (223) behind the location; Described fixed support (6) is by two high columns (61), a short column (62) and fixed base plate (63) are formed, two high columns (61) and a short column (62) all are fixed on the fixed base plate (63), the distributing position of three root posts is corresponding with three the location and installation holes (214) on the movable floor (21), center at every root post all is provided with screwed hole, two mounting planes (213) on the movable floor (21) of floating holder (2) and mid-plane (212) set aside on three root posts and with location trip bolt (7) and fix, after floating holder (2) fixed installation, cooperation seam (14) on the workpiece to be processed (1) up, housing screw (223) end face has the gap between fixed base plate (63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200382328U CN202028935U (en) | 2011-02-14 | 2011-02-14 | Composite fixture for processing matched spigots of motor car bogie axle box upper part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200382328U CN202028935U (en) | 2011-02-14 | 2011-02-14 | Composite fixture for processing matched spigots of motor car bogie axle box upper part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202028935U true CN202028935U (en) | 2011-11-09 |
Family
ID=44891247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200382328U Expired - Fee Related CN202028935U (en) | 2011-02-14 | 2011-02-14 | Composite fixture for processing matched spigots of motor car bogie axle box upper part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202028935U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846694A (en) * | 2012-12-03 | 2014-06-11 | 杨家坤 | Vertical boring clamping device for brake shoe block |
-
2011
- 2011-02-14 CN CN2011200382328U patent/CN202028935U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846694A (en) * | 2012-12-03 | 2014-06-11 | 杨家坤 | Vertical boring clamping device for brake shoe block |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201940834U (en) | Movable fixture for processing upper journal box fitting spigot | |
| AU2011320270B2 (en) | Method of processing gear reduction box | |
| CN202344277U (en) | Moving device of fixture for X axis and Y axis of multi-axial horizontal type machine tool | |
| CN102172841A (en) | Compound fixture for processing matched seam allowance on upper body of motor car bogie axle box | |
| CN104476258A (en) | Fixture and method for processing half-shaft casing holes at both ends of rear axle housing in vehicle | |
| CN101658997A (en) | Method for repairing and processing bearing hole of main bearing cap of diesel engine body of diesel locomotive | |
| CN113211018B (en) | Machining process of ultra-long large-diameter thin-wall steel pipe | |
| CN108907575B (en) | Hydraulic support back timber tailor-welding frock | |
| CN102922021A (en) | Machining method of cylindrical surface long keyway of throttle valve spindle | |
| CN104493268A (en) | Tooling for milling center hole in cam shaft and method for milling center hole by using same | |
| CN203738062U (en) | Eccentric bushing machining device with included angle between hole axis and external circle axis | |
| CN111618350A (en) | Boring jig and method for boring by using same | |
| CN102085620A (en) | Movable fixture used for processing matched seam allowance of axle box upper body | |
| CN202028935U (en) | Composite fixture for processing matched spigots of motor car bogie axle box upper part | |
| CN106352756A (en) | Test tool | |
| CN104551715A (en) | Six-axis center passing type turn-milling machine tool formed by matching between positive axis mechanism and third axis set mechanism | |
| CN103433767A (en) | Milling clamp for microscope zoom support | |
| CN204195323U (en) | A kind of flat milling device for bench drill | |
| CN201940835U (en) | Adjusting fixture for processing upper journal box fitting spigot | |
| CN212071206U (en) | Railway passenger car axle box rotating arm machining positioning fixture | |
| CN213889123U (en) | Swing arm machining positioning fixture | |
| CN211248948U (en) | Welding machine auxiliary tool capable of simultaneously welding two oil cylinder fixing seats | |
| CN202028946U (en) | Movable clamp fixed mount for processing matching spigot of axle box upper body | |
| CN102085621A (en) | Adjusting fixture used for processing matched seam allowance of axle box upper body | |
| CN113681243A (en) | Method for processing spline type mandrel and special angle-adjustable magnetic disk |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20150214 |
|
| EXPY | Termination of patent right or utility model |