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(c) Position the specimen in the lower grip so that it is in

line with the upper grip, and then tighten the thumb-
screws. Again, do not fully tighten yet.

(d) On the upper grip, adjust the thumbscrews in or out

in tandem to align the specimen with the centering
mark above the opening on the body of the grip.

(e) Repeat Step (d) for the lower grip.

(f) Without upsetting the adjustment in the previous two

steps, tighten the two thumbscrews simultaneously
on each of the upper and lower grips enough to pro-
vide the required gripping force for the test.

Screw Grips

M10-82716-14

4-10

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Содержание 2716-016

Страница 1: ...M10 82716 14 Issue A March 1997 Miniature Grips for Low Force Testing Operator s Guide ...

Страница 2: ...ts to duplicate or otherwise copy this document and rights to disclose the document and the information that it contains to others and the right to use the information contained therein may be acquired only by written permission signed by a duly authorized officer of Instron Corporation Copyright 1997 Instron Corporation ...

Страница 3: ...Amendment Incorporation Record Amendment No Brief Description of Content ECR No Person Incorporating Amendment 1 2 3 4 5 6 7 8 9 10 Preliminary Pages iii ...

Страница 4: ...Amendment Incorporation Record Amendment No Brief Description Of Content ECR No Person Incorporating Amendment 11 12 13 14 15 Revision Record Revision ECR No Preliminary Pages M10 82716 14 iv ...

Страница 5: ...ead to injury or death The word Caution is used where a hazard may lead to damage to equipment or to loss of data Ensure that the test set up and the actual test you will be using on materials assemblies or structures constitutes no hazard to yourself or others Make full use of all mechani cal and electronic limits features These are supplied for your safety to enable you to prevent movement of th...

Страница 6: ...y while the covers are removed unless you are specifically instructed to do so in the manual If the equipment needs to be operated to perform maintenance tasks with the covers removed en sure that all loose clothing long hair etc is tied back Re fit covers as soon as possible Shut down the hydraulic power supply and discharge hydraulic pressure before disconnection of any hydraulic fluid coupling ...

Страница 7: ...ide range of specimen materials assemblies or structures that may be tested any hazard resulting from the failure of a test specimen assem bly or structure is entirely the responsibility of the owner and the user of the equipment Protect electrical cables from damage and inadvertent disconnection The loss of controlling and feedback signals that can re sult from a disconnected or damaged cable cau...

Страница 8: ...re control equipment is in use You should note that the hazard from extreme temperature can extend be yond the immediate area of the test Take care when installing or removing a specimen assembly or structure Installation or removal of a specimen assembly or struc ture involves working inside the hazard area between the grips or fixtures Keep clear of the jaws of a grip or fixture at all times Kee...

Страница 9: ... settings are such that unex pected actuator or crosshead movement cannot occur Keep clear of the operating envelope of a robotic device unless the device is de activated The robot in an automated testing system presents a haz ard because its movements are hard to predict The robot can go instantly from a waiting state to high speed opera tion in several axes of motion During system operation keep...

Страница 10: ...1 5 Screw Grips 1 7 Chuck Grips 1 9 Lever Action Fiber Grips 1 11 2 Specifications Overview 2 1 Wedge Grips 2 2 Specifications 2 2 Dimensions 2 2 Screw Grips 2 4 Specifications 2 4 Dimensions 2 4 Chuck Grips 2 6 Specifications 2 6 Dimensions 2 6 Lever Action Fiber Grips 2 8 Preliminary Pages M10 82716 14 x ...

Страница 11: ... Overview 3 1 General 3 2 Grip Installation 3 3 Fiber Grips 3 4 Converting from Vertical to Horizontal Mounting 3 4 4 Operation Overview 4 1 General 4 2 Wedge Grips 4 3 Installing Grip Faces 4 3 Loading Specimens 4 4 Screw Grips 4 7 Installing Grip Faces 4 7 Loading Specimens 4 9 Chuck Grips 4 11 Preliminary Pages xi ...

Страница 12: ...mens 4 13 Adjusting Gripping Force 4 13 5 Maintenance Overview 5 1 General 5 2 Lubricating Wedge Grips 5 3 6 Illustrated Parts Overview 6 1 General 6 2 Wedge Grips Parts List 6 4 Screw Grips Parts List 6 6 Chuck Grips Parts List 6 8 Lever Action Fiber Grips Parts List 6 10 Preliminary Pages M10 82716 14 xii ...

Страница 13: ...ensions 2 7 2 4 Lever Action Fiber Grips Dimensions 2 9 3 1 Vertical to Horizontal Mounting Conversion 3 6 3 2 Mounting the Grip 3 7 3 3 Adjusting Grip Position on the Post 3 7 4 1 Wedge Grip Operation 4 5 4 2 Screw Grip Operation 4 8 4 3 Lever Action Fiber Grips Operation 4 14 6 1 Wedge Grips Parts Breakdown 6 4 6 2 Screw Grips Parts Breakdown 6 6 6 3 Chuck Grips Parts Breakdown 6 8 Preliminary P...

Страница 14: ...List of Illustrations continued Figure Page 6 4 Lever Action Fiber Grips Parts Breakdown 6 10 6 5 Horizontal Mounting Parts 6 12 Preliminary Pages M10 82716 14 xiv ...

Страница 15: ...List of Tables 6 1 Wedge Grips Parts List 6 5 6 2 Screw Grips Parts List 6 7 6 3 Chuck Grips Parts List 6 9 6 4 Lever Action Fiber Grips Parts List 6 11 Preliminary Pages xv ...

Страница 16: ...Preliminary Pages M10 82716 14 xvi ...

Страница 17: ...ge 1 7 Chuck Grips Page 1 9 Lever Action Fiber Grips Page 1 11 This chapter describes several types of miniature grips designed for lightly loaded materials testing Included is a description of the grips their specifications installa tion operation maintenance and in most cases a parts breakdown Introduction 1 1 ...

Страница 18: ...mechani cal action wedge grips manually operated screw grips a set of chuck grips similar to the chuck on an electric drill and a set of pincer action fiber grips To complete the collection of miniature grips in addition to the grips covered here certain models of pneumatic wedge grips cord and yarn grips and fiber grips from the standard series of grips of these types can also be used on the sing...

Страница 19: ...kdown The chapters are sub divided into information about each type of grip Throughout the chapters the order of presenting the grips wedge screw chuck and fiber the same so that you will find navigating through the manual easier and can easily find the information about the particular grip you are working with Each type of grip has its own major heading within each chapter Introduction About this...

Страница 20: ...Figure 1 1 Wedge Grips About this Manual M10 82716 14 1 4 ...

Страница 21: ...s turned the grip body is raised or lowered while the jaws remain sta tionary see Figure 1 1 This action forces the jaw faces together or apart The amount of gripping force applied to the specimen is controlled by how hard the operating ring is turned Because the jaw faces do not move mini mal preload is applied to the specimen while the grips are tightened The jaw faces are interchangeable and ha...

Страница 22: ...Figure 1 2 Screw Grips Wedge Grips M10 82716 14 1 6 ...

Страница 23: ...re tightened There are several types of interchangeable jaw faces to accommodate different types of specimens Smooth Face This face is used for flat specimens such as paper and thin films Serrated Face This face is used for flat specimens of harder material such as thin sheet metal Rubber Coated Face This face is used for flat specimens that may be slippery such as plastic films Line Contact Face ...

Страница 24: ...Figure 1 3 Chuck Grips Screw Grips M10 82716 14 1 8 ...

Страница 25: ...r use in Instron Type 0 grip cou plings see Figure 1 3 They have a soft plastic coating for easy tightening You adjust the gripping force on the specimen by varying the amount of torque applied to the chuck The chuck grips are suitable only for round and hexago nal specimens and the chuck jaws are not interchange able Introduction Chuck Grips 1 9 ...

Страница 26: ...Figure 1 4 Lever Action Fiber Grips Chuck Grips M10 82716 14 1 10 ...

Страница 27: ... mounted in either a vertical or horizon tal position In the vertical position the grips will be slightly stiffer since there is no bending moment as there is in the horizontal position However it is slightly more difficult to load specimens with the grips in the ver tical position In the horizontal position see Figures 3 3 and 3 4 specimen loading is easier but there is more of a tendency for the...

Страница 28: ...Lever Action Fiber Grips M10 82716 14 1 12 ...

Страница 29: ...rview Wedge Grips Page 2 2 Screw Grips Page 2 4 Chuck Grips Page 2 6 Lever Action Fiber Grips Page 2 8 This chapter gives electrical and physical specifications for the four types of grips covered in this manual Specifications 2 1 ...

Страница 30: ...0 to 0 25 in Jaw Face Width 19 mm 0 75 in 19 mm 0 75 in Jaw Face Height 19 mm 0 75 in 19 mm 0 75 in Operating Temp 0 to 100 C 32 to 212 F 0 to 100 C 32 to 212 F Grip Mounting Type O Type O Material Anodized aluminum Stainless steel Dimensions Overall Length Jaws Extended 94 mm 3 7 in Overall Length Jaws Retracted 103 mm 4 0 in Overall Width 54 mm 2 125 in Wedge Grips M10 82716 14 2 2 ...

Страница 31: ...8 9 95 42 7 4 86 54 28 12 33 4 19 Figure 2 1 Wedge Grip Dimensions Specifications Wedge Grips 2 3 ...

Страница 32: ... 4 x 25 4 mm 1 in x 1 in Operating Temperature 0 to 100 C 32 to 212 F Grip Mounting Type Type 0 both ends Dimensions See Figure 2 2 Overall Length 75 mm 2 95 in Effective Length 67 mm 2 64 in Overall Width 80 mm 3 15 in minimum 92 7 mm 3 65 in maximum Screw Knob Diameter 23 mm 1 in Weight 490 grams 1 1 lbs Screw Grips M10 82716 14 2 4 ...

Страница 33: ...80 min 92 7 max 75 67 41 23 All Dimensions in Millimeters Figure 2 2 Screw Grips Dimensions Specifications Screw Grips 2 5 ...

Страница 34: ...10 mm 0 395 in Minimum Specimen Size 1 5 mm 0 06 in Operating Temperature 0 to 100 C 32 to 212 F Grip Mounting Type Type 0 both ends Dimensions See Figure 2 3 Overall Length 90 mm 3 54 in Effective Length 82 mm 3 23 in Overall Diameter 45 mm 1 77 in Weight 200 grams 0 44 lbs Chuck Grips M10 82716 14 2 6 ...

Страница 35: ...All Dimensions in Millimeters 45 90 82 Figure 2 3 Chuck Grips Dimensions Specifications Chuck Grips 2 7 ...

Страница 36: ...2 5 mm 0 1 in Operating Temperature 200 to 250 F Grip Mounting Type Type 0 both ends Dimensions See Figure 2 4 Overall Length 111 mm 4 37 in Effective Length 103 mm 4 05 in Overall Width Vertical Orientation Horizontal Orientation 25 mm 1 0 in 87 5 mm 3 45 in Weight 38grams 0 085 lbs Lever Action Fiber Grips M10 82716 14 2 8 ...

Страница 37: ...75 25 22 40 82 103 65 All Dimensions in Millimeters Figure 2 4 Lever Action Fiber Grips Dimensions Specifications Lever Action Fiber Grips 2 9 ...

Страница 38: ...Lever Action Fiber Grips M10 82716 14 2 10 ...

Страница 39: ...ion Page 3 3 Fiber Grips Page 3 5 This chapter contains installation instructions for the four types of Grips covered by this manual It tells how to mount the grips in the load frame and gives installa tion instructions specific to the type of grip Installation 3 1 ...

Страница 40: ...a hole through both for a clevis pin This type of attachment is used on both the load cell adapter and the baseplate adapter of the single column load frame Most of these grips also have a locking nut sometimes called a checknut that when the grip stud is mated in its socket is run up against the rim of the socket to elimi nate any movement or backlash between the stud and socket General M10 82716...

Страница 41: ... the next sec tion a Insert the clevis stud of one of the grips into the cle vis socket in the upper grip adapter b Align the horizontal holes in both the socket and stud and insert a clevis pin through both c Snap a locking clip onto the protruding ends of the clevis pin to keep the pin from falling out during test ing d If the grip has a locking ring turn it until it contacts the rim of the clev...

Страница 42: ... Grips from a vertical to a horizontal mounting do the following a Unscrew the clamp nut see Figure 3 1 This will separate the grip clamp assembly from the clevis adapter b Slide the clamp nut down the grip shaft toward the grip clamps This will expose the knurled clamp shaft nut Remove the clamp shaft nut then remove the grip assembly from the grip adapter c Place the bracket assembly on the grip...

Страница 43: ...et mounting post Leave approxi mately 1 32 in clearance between the grip body and the post see Figure 3 3 Tighten the clamping screw g Replace the grip faces h Replace the knurled clamp shaft nut removed in Step b i To convert the grips back to a vertical orientation per form Steps a through h in reverse Installation Fiber Grips 3 5 ...

Страница 44: ...Grip Adapter Clamp Nut Knurled Clamp Shaft Nut Figure 3 1 Vertical to Horizontal Mounting Conversion Fiber Grips M10 82716 14 3 6 ...

Страница 45: ...djustment Nut Grip Face Pins Square Mounting Post Grip Clevis Adapter Square Cutout Figure 3 2 Mounting the Grip Clamping Screw 0 8 mm Clearance Figure 3 3 Adjusting Grip Position on the Post Installation Fiber Grips 3 7 ...

Страница 46: ...Fiber Grips M10 82716 14 3 8 ...

Страница 47: ...rips Page 4 7 Chuck Grips Page 4 11 Lever Action Fiber Grips Page 4 13 This chapter gives operating instructions for the four types of Grips It will tell you how to load specimens into the grips and gives any operating instructions spe cific to the type of grip Operation 4 1 ...

Страница 48: ... of instruc tions for loading specimens into the grips making any adjustments necessary and any instructions that are unique to the specific type of grip The following sections of this chapter describe these pro cedures in detail General M10 82716 14 4 2 ...

Страница 49: ... remove any grip faces currently installed in the grips by rotating the grip actuating thumbwheel to open the grip faces b Unhook the four springs from the pins on the grip faces see Figure 4 1 c The grip faces are now loose in the body of the grip Slide the faces out of the grip body d Check that the grip body has a coating of lubricant on the interior surfaces that contact the grip faces If nece...

Страница 50: ...ed in the grip ro tate the thumbwheel to close the grip Tighten the thumbwheel only enough to keep the specimen from falling out c Open the lower grip using its thumbwheel d Center the specimen in the lower grip if the upper grip is not closed too tight there will be some free dom of movement of the specimen e Close the lower grip by tightening its thumbwheel f Check the specimen alignment it shou...

Страница 51: ...Grip Face Springs 2 Front 2 Rear Grip Faces Grip Actuating Thumbwheel Grip Body Figure 4 1 Wedge Grip Operation Operation Wedge Grips 4 5 ...

Страница 52: ...keep in mind that gripping pressure will tend to in crease with increasing test tension on the specimen Wedge Grips M10 82716 14 4 6 ...

Страница 53: ...at No 2702 131 These faces have a diamond pattern 40 teeth per inch serration and are used for hard or metallic specimens that are more difficult to grip than standard specimens Rubber Face Cat No 2702 132 These faces have a thin rubber surface bonded to the faces to grip thin specimens such as paper and polymer films that can not be gripped satisfactorily with the above faces Line Contact Face Ca...

Страница 54: ...Socket Head Set Screws 2 Front 2 Rear Grip Faces Grip Body Centering Mark Grip Thumbscrew Grip Thumbscrew Figure 4 2 Screw Grip Operation Screw Grips M10 82716 14 4 8 ...

Страница 55: ...tion each of the new grip faces in the body of the grip over the end of the screw shaft Tighten the socket head set screws while holding the face in place using the 1 5 mm hex wrench There should be a small amount of movement of the grip faces when the set screws are tightened properly Loading Specimens To load specimens into the grips do the following a Open both upper and lower grips by unscrewi...

Страница 56: ...humbscrews in or out in tandem to align the specimen with the centering mark above the opening on the body of the grip e Repeat Step d for the lower grip f Without upsetting the adjustment in the previous two steps tighten the two thumbscrews simultaneously on each of the upper and lower grips enough to pro vide the required gripping force for the test Screw Grips M10 82716 14 4 10 ...

Страница 57: ...ad frame enough to be able to insert a specimen into both upper and lower grips Note Tightening the grip collar retracts the grip jaws into the body of the grip which may place an undesirable tensile load on the specimen If this is the case use load con trol on the testing system control panel and monitor the load as the grip collars are tight ened Reduce the load on the specimen as necessar y c I...

Страница 58: ...th one hand while tightening the collar with the other hand to prevent twisting the load string f Tighten the collar on the upper grip enough to pro vide the necessary gripping force as in Step e Chuck Grips M10 82716 14 4 12 ...

Страница 59: ...levers of the upper grip with one hand while placing the fiber specimen in the jaws with the other b Release the levers when the specimen is centered in the grip c Repeat Steps a and b for the lower grip Make sure the fiber specimen is taut between the two grips Adjusting Gripping Force Adjusting gripping force on the specimen will require a certain amount of trial and error to find a spring tensi...

Страница 60: ...similar specimens c If the specimen is slipping in the grips increase the gripping force by rotating the adjusting nut adjacent to the spring clockwise by one or two full turns see Figure 4 3 d Run the dummy test again and check for specimen slippage Gripping Force Adjusting Nut Figure 4 3 Lever Action Fiber Grips Operation Lever Action Fiber Grips M10 82716 14 4 14 ...

Страница 61: ...ing the spring ten sion and running the test in order to eliminate speci men slippage Again if you are not concerned about specimen crushing simply adjust the spring tension for a high gripping force Operation Lever Action Fiber Grips 4 15 ...

Страница 62: ...Lever Action Fiber Grips M10 82716 14 4 16 ...

Страница 63: ...eneral Page 5 2 Lubricating Wedge Grips Page 5 3 This chapter gives some routine maintenance procedures for keeping your grips in top operating condition In cluded are general instructions for cleaning and lubrica tion Maintenance 5 1 ...

Страница 64: ...e moving parts free of dirt and grit Since most of the grips have some plastic parts do not use sol vents or harsh cleaners to clean them The wedge grips are the only grips that require lubrica tion Refer to the next section for lubrication instructions General M10 82716 14 5 2 ...

Страница 65: ...e the grip faces from the body of the grips see Chapter 4 It is not necessary to remove the grips from the load frame but removal may make the work easier b Using a mild solvent remove old grease from the back sides of the grip faces and the interior of the body of the grips c Using Molykote G N Paste grease coat the grip face tracks inside the body with grease Do not use excessive amounts of grea...

Страница 66: ...Lubricating Wedge Grips M10 82716 14 5 4 ...

Страница 67: ... 4 Screw Grips Parts List Page 6 6 Chuck Grips Parts List Page 6 8 Lever Action Fiber Grips Page 6 10 This chapter gives replaceable parts information for the four types of grips covered by this manual The parts list shows the location and identification of parts Illustrated Parts 6 1 ...

Страница 68: ...item and may give the manufacturer s part number when appropriate These parts will have both a manufacturer s part number and an Instron part number The PART NO column lists the Instron part number only The quantity listed in the QTY column is for one grip only To obtain quantities for a set of grips two grips multiply the quantity shown by 2 When ordering parts from Instron be sure to include the...

Страница 69: ...Illustrated Parts General 6 3 ...

Страница 70: ...Wedge Grips Parts List 1 2 3 4 Not Shown 5 6 7 8 9 10 11 Figure 6 1 Wedge Grips Parts Breakdown Wedge Grips Parts List M10 82716 14 6 4 ...

Страница 71: ... 432 1 4 Body Nut T563 624 1 5 Label T563 623 1 6 Thumbwheel T563 620 1 7 Spindle T563 631 1 8 Locknut T1223 1018 1 9 Wave Spring Washer 66 10 21 1 10 Socket Head Set Screw M3 x 6 401F93 1 11 Body Wedge Grip T563 619 1 kN T563 338 2 kN 1 1 ACCESSORIES Tommy Bar 106 2 4 1 Table 6 1 Wedge Grips Parts List Illustrated Parts Wedge Grips Parts List 6 5 ...

Страница 72: ...Screw Grips Parts List 1 2 3 4 5 6 7 4 Figure 6 2 Screw Grips Parts Breakdown Screw Grips Parts List M10 82716 14 6 6 ...

Страница 73: ... 3 x 24 mm 703F051 1 3 Label T563 366 1 4 Knurled Knob and Screw T563 327 2 5 Locknut T1223 1018 1 6 Grip Adapter Type 0 T563 325 1 7 Body Screw Grip T563 324 1 ACCESSORIES Tommy Bar 106 2 4 1 Hex Wrench Short Arm 1 5mm 206D4 1 Table 6 2 Screw Grips Parts List Illustrated Parts Screw Grips Parts List 6 7 ...

Страница 74: ...Chuck Grips Parts List 1 2 3 4 Figure 6 3 Chuck Grips Parts Breakdown Chuck Grips Parts List M10 82716 14 6 8 ...

Страница 75: ...o Qty 1 Tool Chuck 1 5 to 10 mm Keyless 80 54 1027 1 2 Lock Nut T1223 1018 1 3 Grip Adapter 3 8 24 to Type 0 T563 377 1 4 Label T563 373 1 ACCESSORIES Tommy Bar 106 2 4 1 Table 6 3 Chuck Grips Parts List Illustrated Parts Chuck Grips Parts List 6 9 ...

Страница 76: ... Action Fiber Grips Parts List 1 2 3 4 5 6 7 9 10 11 12 13 Inside on shaft 14 Inside next to 13 15 8 Figure 6 4 Lever Action Fiber Grips Parts Breakdown Lever Action Fiber Grips Parts List M10 82716 14 6 10 ...

Страница 77: ...8 OD 66 3 5 1 6 Spring Washer T2 348 1 7 Adjustment Nut T2 349 1 8 Central Shaft T2 374 1 9 Grip Nut T2 375 1 10 Grip Adapter Type 0 T563 316 1 11 Label T563 361 1 12 Shaft Nut T2 376 1 13 Truarc Ring 5133 12 60 6 5 1 14 Compression Washer T2 523 1 15 Grip Frame Left T2 762 1 Table 6 4 Lever Action Fiber Grips Parts List Illustrated Parts Lever Action Fiber Grips Parts List 6 11 ...

Страница 78: ...tion Part No Qty Horizontal Mounting Parts consisting of 16 Clamp Screw T2 377 1 17 Lower Clamp Bracket Assembly A2 162 16 17 Figure 6 5 Horizontal Mounting Parts Lever Action Fiber Grips Parts List M10 82716 14 6 12 ...

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