CN109940196A - A kind of grip device and its processing method for processing fork-truck steering axial cross hole - Google Patents

A kind of grip device and its processing method for processing fork-truck steering axial cross hole Download PDF

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Publication number
CN109940196A
CN109940196A CN201910336300.XA CN201910336300A CN109940196A CN 109940196 A CN109940196 A CN 109940196A CN 201910336300 A CN201910336300 A CN 201910336300A CN 109940196 A CN109940196 A CN 109940196A
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CN
China
Prior art keywords
positioning fixture
workpiece
fixture
hole
positioning
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Pending
Application number
CN201910336300.XA
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Chinese (zh)
Inventor
张振军
魏士标
佘亚楠
解梅
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Nanjing Forestry University
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Nanjing Forestry University
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Application filed by Nanjing Forestry University filed Critical Nanjing Forestry University
Priority to CN201910336300.XA priority Critical patent/CN109940196A/en
Publication of CN109940196A publication Critical patent/CN109940196A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a kind of grip devices and its processing method for processing fork-truck steering axial cross hole, including workpiece, fixture base, fixture base is fixedly connected with lathe, middle part is equipped with positioning fixture in fixture base, positioning fixture includes lower positioning fixture and upper positioning fixture, inverted v-shaped groove is offered on the face that upper positioning fixture is contacted with workpiece, positive V-shaped groove is offered on the face that lower positioning fixture is contacted with workpiece, workpiece is mounted in the gap that two V-shaped grooves are encircled into, clamping supporting plate is installed above upper positioning fixture, it clamps between supporting plate and positioning fixture through guiding axis connection, it clamps and is also connected with pinching screw body between supporting plate and upper positioning fixture, pinching screw body, which passes through, to be clamped supporting plate and is inserted into upper positioning fixture, it is to be threadedly coupled with supporting plate is clamped, rotation clamps the body of screw and upper positioning fixture is driven to move up and down, it clamps or puts Loose workpiece.Present invention reduces work piece positionings in process tightly to use the time with disassembly, improves the utilization rate of production efficiency and lathe.

Description

A kind of grip device and its processing method for processing fork-truck steering axial cross hole
Technical field
The present invention relates to machine-building processing technique fields, and in particular to a kind of fixture for processing fork-truck steering axial cross hole Device and its processing method.
Background technique
The function of fork-truck steering axis is that driver is acted on to the steering moment of steering wheel to pass to diverter, its top It is fixedly connected with steering wheel, lower part is connected with diverter.
Fork-truck steering axis shape is the workpiece of fork-shaped, currently, fork truck left steering axis bores the processing method that cross bore mostly uses It is by way of steering shaft hole end surface platen clamp, to bore two hole of right-angled intersection using the positioning of axis hole rabbet seat is turned to and exist respectively It is processed in two equipment.
But existing fork truck left steering axis bores cross bore axis hole and is positioned by rabbet seat, the mode that end surface press plate clamps It will cause steering shaft cross bore axial dimension to guarantee indirectly, processing dimension error increases, and workpiece quality is not easy to guarantee, and mechanical It clamps, bores two hole of right-angled intersection and processed in two equipment respectively, bring work piece positioning tight in process and workpiece disassembly With duration, and then the utilization rate of production efficiency and lathe is influenced, the process is it is also contemplated that front and back process in workpiece process route Connection problem.
Summary of the invention
The technical problem to be solved by the present invention is to solve the above shortcomings of the prior art and to provide a kind of processing fork-truck steerings The grip device and its processing method in axial cross hole.
To realize the above-mentioned technical purpose, the technical scheme adopted by the invention is as follows:
A kind of grip device for processing fork-truck steering axial cross hole, in which: including fixture base, the fixture base two Side waist hole is fixedly connected by tommyhead bolt with lathe, and middle part is equipped with positioning fixture, the locating clip in the fixture base Tool includes upper positioning fixture and lower positioning fixture, and the lower positioning fixture is fixedly mounted in fixture base, and described is upper fixed Position fixture is mounted on the top of lower positioning fixture, is equipped with clamping supporting plate, the clamping branch above the upper positioning fixture By guiding axis connection between plate and positioning fixture, the guiding axis upper end, which is fixed on, to be clamped on supporting plate, and lower end sequentially passes through It clamps supporting plate and upper positioning fixture and is inserted into lower positioning fixture, offer inverted V-shaped on the bottom surface of the upper positioning fixture Slot offers positive V-shaped groove on the upper bottom surface of the lower positioning fixture, and workpiece is mounted in the gap that two V-shaped grooves are encircled into, Pinching screw body is also connected between the clamping supporting plate and upper positioning fixture, the pinching screw body, which passes through, clamps supporting plate And be inserted into upper positioning fixture, pinching screw body can drive the opposite supporting plate that clamps of positioning fixture to move up and down, and clamp or loosen Workpiece;
The work pieces process end left side is positioned by support nail, and the support nail is horizontal concordant and fixed with workpiece On boss, the boss is mounted in fixture base, and boss upper end is connected with drill bushing connecting plate, the drill bushing connecting plate Drill bushing is connected in work pieces process end top position;
Two floating device for positioning and supporting, the floating device for positioning and supporting packet are also equipped in the fixture base It includes for fixing the first horizontal positioned floating device for positioning and supporting of workpiece connecting pin and is vertically put for fixing workpiece connecting pin The the second floating device for positioning and supporting set;
The first floating device for positioning and supporting includes bracket, the first floating support pin, the first adjusting nut and first Pressure spring, the pedestal lower end are fixed on fixture base side, and the upper end offers cross through hole, first adjusting nut It is mounted in through-hole, the first floating support pin is connected on the first adjusting nut by the first pressure spring, passes through mobile the One adjusting nut horizontal movement, drive pressure spring control the first floating support pin be moved to can with clip workpiece connecting pin position It sets;
The second floating device for positioning and supporting includes the second pressure spring, the second floating support pin and the second adjusting nut, Second adjusting nut is mounted on the base in through-hole, and the second floating support pin is connected to by the second pressure spring On two adjusting nuts, by mobile second adjusting nut vertical movement, the second pressure spring is driven to control the second floating support pin mobile Extremely can with clip workpiece connecting pin position.
To optimize above-mentioned technical proposal, the concrete measure taken further include:
Above-mentioned guiding axis is two, is respectively symmetrically distributed in the both sides of pinching screw body, and the guiding axis upper end is logical It crosses nut and is fixed on and clamp on supporting plate, the upper positioning fixture is opened up there are two through-hole, and two guiding axis pass through, described Through-hole diameter be slightly larger than the diameter of guiding axis, formation is slidably matched.
It is opened up on above-mentioned lower positioning fixture there are two threaded hole, the guiding axis lower thread is connected to lower locating clip Have in upper two threaded holes.
T-slot is offered among above-mentioned upper positioning fixture, the pinching screw body is T shape screw, and lower end is roundlet Cylindricality, the pinching screw body lower end are inserted into T-slot.
Above-mentioned pinching screw body is threadedly coupled with supporting plate is clamped.
Above-mentioned is all stepped hole for connecting the first adjusting nut and the through-hole of the second adjusting nut, up-small and down-big, Macropore lower end processes screw thread, and two adjusting nuts are connect with two through hole whorls respectively.
Above-mentioned the first floating support pin and the second floating support pin top is all taper, and lower part offers hole, described First pressure spring and the second pressure spring are connected in the hole of two supporting pins.
The V-arrangement angle of above-mentioned positive V-shaped groove and inverted v-shaped groove is all 90 °.
Above-mentioned pedestal lower end is connect with fixture base side screw.
The processing method that a kind of grip device using above-mentioned processing fork-truck steering axial cross hole is also disclosed in the present invention, packet Containing following steps:
Step A: adjusting the first adjusting nut and the second adjusting nut, keeps the first floating positioning support pin and the second floating fixed Position supporting pin is adjusted to just suitable position of the clip among workpiece connecting pin, is then installed lower positioning fixture and is fixed on lathe On, rotation adjusts pinching screw body and moves upwards, and positioning fixture is then placed in workpiece far from lower positioning fixture in control, described Work pieces process end left side by support nail position, the workpiece connecting pin is horizontally arranged and passes through the first floating support pin Positioning, the first floating support pin card are clipped between workpiece connecting pin, and finally rotation adjusts pinching screw body and moves downward, Positioning fixture close to lower positioning fixture and clamps workpiece in control, completes positioning, and one in cross bore is then processed by drill bushing Hole;
Step B: rotation adjust pinching screw body move upwards, in control positioning fixture far from lower positioning fixture, then Workpiece rotation °, workpiece connecting pin pass vertically downwards through the support of the second floating support pin in fixture base and position, and described second Floating support pin card is clipped in the centre of workpiece connecting pin, and then rotation adjusts pinching screw body and moves downward, locating clip in control Have close to lower positioning fixture and fix to clamp workpiece, complete positioning, another hole in cross bore is then processed by drill bushing.
The present invention it is a kind of process fork-truck steering axial cross hole grip device the utility model has the advantages that
The present invention provides a kind of grip device for processing fork-truck steering axial cross hole, can pass through two on a process equipment Secondary positioning, which clamps, to be completed to bore two hole machined of right-angled intersection;Steering shaft is positioned by the setting of V-shaped groove and two floating support pins Precisely, the requirement that ensure that processing dimension shortens and brings work piece positioning tight in process and workpiece disassembly time, solution The certainly successive problem in process route improves the utilization rate of production efficiency and machine tool.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is structure schematic top plan view of the invention;
Fig. 3 is that form workpiece of the invention lays flat right side view;
Fig. 4 is that form workpiece of the invention is rotated by 90 ° right side view.
Appended drawing reference are as follows: workpiece 1, fixture base 2, positioning fixture 3, lower positioning fixture 31, upper positioning fixture 32, inverted V-shaped Slot 33, clamps supporting plate 4, guiding axis 5, pinching screw body 6, support nail 7, boss 8, drill bushing connecting plate 9, drill bushing at positive V-shaped groove 34 10, the first floating device for positioning and supporting 11, bracket 12, the first floating support pin 13, the first adjusting nut 14, the first pressure spring 15, Second floating device for positioning and supporting 16, the second pressure spring 17, the second floating support pin 18, the second adjusting nut 19, workpiece connecting pin 20。
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
As shown in Figures 1 to 4, the present invention is a kind of grip device for processing fork-truck steering axial cross hole, in which: including folder Has pedestal 2,2 two sides waist hole of fixture base is fixedly connected by tommyhead bolt with lathe, and middle part is equipped with locating clip in fixture base 2 Tool 3, positioning fixture 3 include upper positioning fixture 31 and lower positioning fixture 32, and lower positioning fixture 32 is fixedly mounted on fixture base 2 On, upper positioning fixture 31 is mounted on the top of lower positioning fixture 32, is equipped with above upper positioning fixture 31 and clamps supporting plate 4, clamps It is connected between supporting plate 4 and positioning fixture 3 by guiding axis 5,5 upper end of guiding axis, which is fixed on, to be clamped on supporting plate 4, and lower end sequentially passes through It clamps supporting plate 4 and upper positioning fixture 31 and is inserted into lower positioning fixture 32, offer inverted V-shaped on the bottom surface of upper positioning fixture 31 Slot 33 offers positive V-shaped groove 34 on the upper bottom surface of lower positioning fixture 32, and workpiece 1 is mounted on the gap that two V-shaped grooves are encircled into In, it clamps and is also connected with pinching screw body 6 between supporting plate 4 and upper positioning fixture 31, pinching screw body 6, which passes through, clamps supporting plate 4 simultaneously In insertion in positioning fixture 31, pinching screw body 6 can drive the opposite supporting plate 4 that clamps of positioning fixture 31 to move up and down, clamp or Loosen workpiece 1;
Workpiece 1 is processed end left side and is positioned by support nail 7, and support nail 7 is horizontal concordant with workpiece 1 and is fixed on boss 8 On, boss 8 is mounted in fixture base 2, and 8 upper end of boss is connected with drill bushing connecting plate 9, and drill bushing connecting plate 9 processes end in workpiece 1 Top position is connected with drill bushing 10;
Two floating device for positioning and supporting are also equipped in fixture base 2, floating device for positioning and supporting includes for fixing It the first horizontal positioned floating device for positioning and supporting 11 of workpiece connecting pin 20 and is disposed vertically for fixing workpiece connecting pin 20 Second floating device for positioning and supporting 16;
First floating device for positioning and supporting 11 includes bracket 12, the first floating support pin 13, the first adjusting nut 14 and the One pressure spring 15,12 lower end of bracket are fixed on 2 side of fixture base, and the upper end offers cross through hole, the first adjusting nut 14 peace In through-hole, the first floating support pin 13 is connected on the first adjusting nut 14 by the first pressure spring 15, passes through mobile first 14 horizontal movement of adjusting nut, driving the first floating support pin 13 of control of pressure spring 15 to be moved to can be with clip in workpiece connecting pin 20 Position;
Second floating device for positioning and supporting 16 includes the second pressure spring 17, the second floating support pin 18 and the second adjusting nut 19, the second adjusting nut 19 is mounted on the base in through-hole, and the second floating support pin 18 is connected to second by the second pressure spring 17 On adjusting nut 19, by mobile second adjusting nut 14 vertical movement, the second pressure spring 17 is driven to control the second floating support pin 18 be moved to can with clip workpiece connecting pin 20 position.
In the present embodiment, guiding axis is two, is respectively symmetrically distributed in the both sides of pinching screw body 6, and 5 upper end of guiding axis is logical It crosses nut to be fixed on clamping supporting plate 4, upper positioning fixture 31 is opened up there are two through-hole, and two guiding axis 5 pass through, and through-hole is straight Diameter is slightly larger than the diameter of guiding axis 5, and formation is slidably matched.
In the present embodiment, opened up on lower positioning fixture 32 there are two threaded hole, 5 lower thread of guiding axis is connected to lower positioning On fixture 32 in two threaded holes.
In the present embodiment, T-slot is offered among upper positioning fixture 31, pinching screw body 6 is T shape screw, pinching screw 6 lower end of body is inserted into T-slot.
In the present embodiment, pinching screw body 6 is threadedly coupled with supporting plate 4 is clamped.
In the present embodiment, the through-hole for connecting the first adjusting nut 14 and the second adjusting nut 19 is all stepped hole, Up-small and down-big, macropore lower end processes screw thread, and two adjusting nuts are connect with two through hole whorls respectively.
In the present embodiment, the first floating support pin 13 and 18 top of the second floating support pin are all taper, and lower part offers Hole, the first pressure spring 15 and the second pressure spring 17 are connected in the hole of two supporting pins.
In the present embodiment, the V-arrangement angle of positive V-shaped groove 34 and inverted v-shaped groove 33 is all 90 °.
In the present embodiment, 12 lower end of bracket is connect with 2 side screw of fixture base.
A kind of processing method for processing fork-truck steering axial cross hole, specific as follows:
By taking Fig. 1 to Fig. 4 as an example, step A: adjusting the first adjusting nut 14 and the second adjusting nut 19, keeps the first floating fixed Position supporting pin 13 and the second floating positioning support pin 19 adjust the suitable position to just clip among workpiece connecting pin 20, so Lower positioning fixture 32 is installed afterwards to be fixed on lathe, rotation adjusts pinching screw body 6 and moves upwards, and positioning fixture 31 is remote in control From lower positioning fixture 32, it is then placed in workpiece 1, workpiece 1 is processed end left side and positioned by support nail 7,20 water of workpiece connecting pin Placing flat is simultaneously positioned by the first floating support pin 13, and 13 clip of the first floating support pin is between workpiece connecting pin 20, finally Rotation adjusts pinching screw body 6 and moves downward, and positioning fixture 31 close to lower positioning fixture 32 and clamps workpiece 1 in control, completes Then the hole in cross bore is processed in positioning by drill bushing 10;
Step B: rotation adjusts pinching screw body 6 and moves upwards, and positioning fixture 31 is far from lower positioning fixture 32 in control, so Workpiece 1 is rotated by 90 ° afterwards, it is fixed that workpiece connecting pin 20 passes vertically downwards through the support of the second floating support pin 18 in fixture base 2 Position, 18 clip of the second floating support pin is in the centre of workpiece connecting pin 20, and then rotation adjusts pinching screw body 6 and moves downward, Positioning fixture 31 close to lower positioning fixture 32 and fixes to clamp workpiece 1 in control, completes positioning, then passes through the processing of drill bushing 10 ten Another hole in word hole.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment, All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention Range.

Claims (10)

1. a kind of grip device for processing fork-truck steering axial cross hole, it is characterised in that: including fixture base (2), the folder Tool pedestal (2) two sides waist hole is fixedly connected by tommyhead bolt with lathe, and middle part is equipped with locating clip in the fixture base (2) Have (3), the positioning fixture (3) includes upper positioning fixture (31) and lower positioning fixture (32), the lower positioning fixture (32) it is fixedly mounted on fixture base (2), the upper positioning fixture (31) is mounted on the top of lower positioning fixture (32), institute It is equipped with above the upper positioning fixture (31) stated and clamps supporting plate (4), led between the clamping supporting plate (4) and positioning fixture (3) Guiding axis (5) connection is crossed, the guiding axis (5) upper end, which is fixed on, to be clamped on supporting plate (4), and lower end sequentially passes through clamping supporting plate (4) it and in upper positioning fixture (31) and insertion lower positioning fixture (32), is opened up on the bottom surface of the upper positioning fixture (31) Have inverted v-shaped groove (33), is offered positive V-shaped groove (34) on the upper bottom surface of the lower positioning fixture (32), workpiece (1) is mounted on two In the gap that a V-shaped groove is encircled into, pinching screw body is also connected between the clamping supporting plate (4) and upper positioning fixture (31) (6), the pinching screw body (6), which passes through, clamps supporting plate (4) and is inserted into upper positioning fixture (31), and pinching screw body (6) can Opposite clamp supporting plate (4) of positioning fixture (31) move up and down in drive, clamp or loosen workpiece (1);
Workpiece (1) the processing end left side is positioned by support nail (7), and the support nail (7) and workpiece (1) are horizontal flat It together and is fixed on boss (8), the boss (8) is mounted on fixture base (2), and boss (8) upper end is connected with drill bushing company Fishplate bar (9), the drill bushing connecting plate (9) are connected with drill bushing (10) in workpiece (1) processing end top position;
Two floating device for positioning and supporting, the floating device for positioning and supporting packet are also equipped in the fixture base (2) It includes and is connected for fixing first horizontal positioned floating device for positioning and supporting (11) of workpiece connecting pin (20) with for fixing workpiece The second floating device for positioning and supporting (16) that end (20) is disposed vertically;
The first floating device for positioning and supporting (11) includes bracket (12), the first floating support pin (13), the first adjusting spiral shell Female (14) and the first pressure spring (15), the bracket (12) lower end are fixed on fixture base (2) side, and the upper end offers transverse direction Through-hole, first adjusting nut (14) are mounted in through-hole, and the first floating support pin (13) passes through the first pressure spring (15) it is connected on the first adjusting nut (14), by mobile first adjusting nut (14) horizontal movement, drives pressure spring (15) control Make the first floating support pin (13) be moved to can with clip workpiece connecting pin (20) position;
The second floating device for positioning and supporting (16) includes the second pressure spring (17), the second floating support pin (18) and the second tune It saves nut (19), second adjusting nut (19) is mounted on the base in through-hole, the second floating support pin (18) It is connected on the second adjusting nut (19) by the second pressure spring (17), passes through mobile second adjusting nut (14) vertical movement, band Dynamic second pressure spring (17) control the second floating support pin (18) be moved to can with clip workpiece connecting pin (20) position.
2. a kind of grip device for processing fork-truck steering axial cross hole according to claim 1, it is characterised in that: described Guiding axis is two, is respectively symmetrically distributed in the both sides of pinching screw body (6), and the guiding axis (5) upper end is solid by nut It is scheduled on and clamps on supporting plate (4), the upper positioning fixture (31) is opened up there are two through-hole, and two guiding axis (5) pass through, institute The through-hole diameter stated is slightly larger than the diameter of guiding axis (5), and formation is slidably matched.
3. a kind of grip device for processing fork-truck steering axial cross hole according to claim 1, it is characterised in that: described It is opened up on lower positioning fixture (32) there are two threaded hole, the guiding axis (5) lower thread is connected to lower positioning fixture (32) In upper two threaded holes.
4. a kind of grip device for processing fork-truck steering axial cross hole according to claim 1, it is characterised in that: described T-slot is offered among upper positioning fixture (31), the pinching screw body (6) is T shape screw, the pinching screw body (6) in lower end insertion T-slot.
5. a kind of grip device for processing fork-truck steering axial cross hole according to claim 4, it is characterised in that: described Pinching screw body (6) is threadedly coupled with supporting plate (4) are clamped.
6. a kind of grip device for processing fork-truck steering axial cross hole according to claim 1, it is characterised in that: described Through-hole for connecting the first adjusting nut (14) and the second adjusting nut (19) is all stepped hole, up-small and down-big, under macropore End processing screw thread, two adjusting nuts are connect with two through hole whorls respectively.
7. a kind of grip device for processing fork-truck steering axial cross hole according to claim 1, it is characterised in that: described First floating support pin (13) and second floating support pin (18) top are all taper, and lower part offers hole, first pressure Spring (15) and the second pressure spring (17) are connected in the hole of two supporting pins.
8. a kind of grip device for processing fork-truck steering axial cross hole according to claim 1, it is characterised in that: described The V-arrangement angle of positive V-shaped groove (34) and inverted v-shaped groove (33) is all 90 °.
9. a kind of grip device for processing fork-truck steering axial cross hole according to claim 1, it is characterised in that: described Bracket (12) lower end is connect with fixture base (2) side screw.
10. a kind of processing method of the grip device in the described in any item processing fork-truck steering axial cross holes of such as claim 19, It is characterized by comprising following steps:
Step A: adjusting the first adjusting nut (14) and the second adjusting nut (19), makes the first floating positioning support pin (13) and the Two floating positioning support pins (19) adjust the suitable position intermediate in workpiece connecting pin (20) to just clip, and then installation is lower fixed Position fixture (32) is fixed on lathe, and rotation adjusts pinching screw body (6) and moves upwards, and positioning fixture (31) is far under in control Positioning fixture (32) is then placed in workpiece (1), and the workpiece (1) is processed end left side and positioned by support nail (7), described Workpiece connecting pin (20) it is horizontal positioned and positioned by the first floating support pin (13), the first floating support pin (13) Clip is between workpiece connecting pin (20), and finally rotation adjusts pinching screw body (6) and moves downward, positioning fixture (31) in control It close to lower positioning fixture (32) and clamps workpiece (1), completes positioning, the hole in cross bore is then processed by drill bushing (10);
Step B: rotation adjusts pinching screw body (6) and moves upwards, and positioning fixture (31) is separate lower positioning fixture (32) in control, Then workpiece (1) is rotated by 90 °, workpiece connecting pin (20) pass vertically downwards through the second floating support pin on fixture base (2) (18) support positioning, second floating support pin (18) clip is in the centre of workpiece connecting pin (20), and then rotation is adjusted Pinching screw body (6) moves downward, and positioning fixture (31) close to lower positioning fixture (32) and fixes to clamp workpiece (1) in control, Positioning is completed, another hole in cross bore is then processed by drill bushing (10).
CN201910336300.XA 2019-04-24 2019-04-24 A kind of grip device and its processing method for processing fork-truck steering axial cross hole Pending CN109940196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910336300.XA CN109940196A (en) 2019-04-24 2019-04-24 A kind of grip device and its processing method for processing fork-truck steering axial cross hole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910336300.XA CN109940196A (en) 2019-04-24 2019-04-24 A kind of grip device and its processing method for processing fork-truck steering axial cross hole

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CN109940196A true CN109940196A (en) 2019-06-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112658718A (en) * 2020-12-11 2021-04-16 北京星航机电装备有限公司 Be used for rudder face part rudder axle processing clamping device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112658718A (en) * 2020-12-11 2021-04-16 北京星航机电装备有限公司 Be used for rudder face part rudder axle processing clamping device

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