DHPC-20-A-S - Préenseur pneumatique Festo - Free user manual and instructions

Product Type	Pneumatic Parallel Gripper
Model	DHPC-20-A-S
Size	20
Pneumatic Port	M5
Operating Pressure	0.1 ... 0.8 MPa 1 ... 8 bar 15 ... 116 psi
Gripping Force (at 0.6 MPa / 6 bar)	Open: 192.6 N Close: 159.5 N
Ambient Temperature Range	-10 ... +60 °C
Storage Temperature Range	-10 ... +80 °C
Operating Medium	Compressed air to ISO 8573-1:2010 [7:4:4]
Mounting Position	Any
Function	Double-acting (with spring return for NC/NO variants)
Maintenance	Clean with non-abrasive agents and soft cloths. Store in cool, dry, UV-protected environment.
Safety Precautions	Remove payload before exhausting. Disconnect compressed air supply before mounting, installation, or maintenance.
Repair and Spare Parts	Send to Festo repair service. Spare parts available at www.festo.com/spareparts.
Intended Use	Gripping and holding payloads (workpieces) using custom-designed gripper fingers.

Frequently Asked Questions - DHPC-20-A-S Festo

What is the intended use of the Festo DHPC-20-A-S?

The intended use is to grip and hold payloads (workpieces) using custom-designed gripper fingers attached by the customer.

What safety precautions must be taken before maintenance?

Before maintenance, switch off the compressed air supply and secure it from being switched back on. Also, remove the payload to prevent falling.

How do I mount the gripper?

Mount the gripper via threaded holes or through-holes using the specified tightening torques. Ensure proper alignment with locating holes. Refer to the manual for size-specific dimensions.

How do I adjust the gripping speed?

Use an upstream one-way flow control valve. Screw in the flow control screw completely then unscrew one turn. Adjust until the piston stop is soft (not hard/metallic).

What should I do if the gripper does not hold the payload securely?

Possible causes and remedies: increase operating pressure (max 0.8 MPa), move the pressure point of gripper fingers inward, or select a larger gripper if payload is too heavy. Also check gripping direction.

How do I clean the gripper?

Clean the product only with non-abrasive cleaning agents and soft cloths.

What is the operating pressure range for the DHPC-20-A-S?

The operating pressure range is 0.1 to 0.8 MPa (1 to 8 bar, 15 to 116 psi) for the standard version.

What are the gripping forces at 6 bar?

At 6 bar (0.6 MPa), the gripping force when opening is 192.6 N and when closing is 159.5 N.

Where can I find spare parts or repair service?

Spare parts are available at www.festo.com/spareparts. For repair, send the product to the Festo repair service.

How should the product be stored?

Store the product in a cool, dry, UV-protected and corrosion-protected environment. Minimize storage time.

USER MANUAL DHPC-20-A-S Festo

Operating instructions

8150807

2021-05a

[8150809]

8150807

Translation of the original instructions

© 2021 all rights reserved to Festo SE & Co. KG

1 Applicable Documents

i

All available documents for the product → www.festo.com/sp.

2 Safety

2.1 Safety Instructions

• Take into consideration the ambient conditions at the location of use.
  -Only use the product in original status without unauthorised modifications.
  -Observe labelling on the product.
• Store the product in a cool, dry, UV-protected and corrosion-protected environment. Ensure that storage times are kept to a minimum.
• Prior to mounting, installation and maintenance work: Switch off compressed air supply and secure it from being switched back on.
  -Observe tightening torques. Unless otherwise specified, the tolerance is ± 20% .

2.2 Intended use

The intended use of the product is to grip and hold payloads (workpieces) using custom-designed gripper fingers attached by the customer.

2.3 Training of qualified personnel

Installation, commissioning, maintenance and disassembly should only be conducted by qualified personnel.

The specialized personnel must be familiar with the installation and operation of electrical and pneumatic control systems.

3 Additional information

- Contact the regional Festo contact if you have technical problems

→ www.festo.com.

-Accessories and spare parts → www.festo.com/catalogue.

4 Product overview

4.1 Function

• Alternating pressurisation of the supply ports causes a piston in the gripper to move (double-acting).
• A gripper with integrated spring return is used to exert the gripper force. When exhausting the single-acting gripper: the spring return moves the gripper jaws to the initial position.

-N/O contact: NO (normally open)

-N/C contact: NC (normally closed)

• The piston movement is transmitted mechanically to the gripper jaws. Gripper fingers are fastened to the gripper jaws. Closing or opening the gripper fingers clamps the payload to the outer contour (external gripping) or the inner contour (internal gripping).
• The gripping force is adjusted by external regulation of the operating pressure.
  -The gripper has integrated fixed flow restrictors. If the max. gripper finger weights and the max. gripper finger lengths are in compliance, an external flow control is not required.

4.2 Structure

1

Gripper jaw

2

Threaded hole for mounting

3

Locating hole

4

Supply port

5

Slot for proximity switch

Fig. 1: Structure

5 Assembly

5.1 Preparing the gripper fingers

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The gripper fingers are not included in the delivery.

Requirements for the gripper fingers → 11 Technical data:

• Observe the max. permissible forces and max. permissible torques at the gripper jaw.
  -Observe the max. length and max. weight.
• Use gripper fingers that are as short and light as possible.
• Manufacture gripper fingers that are suitable for the payload and type of gripping action.

Size 6 10 16
Width at gripper jaws [mm] 4.3	-0.05	5.4-0.05	7-0.05

Tab. 1: Width of gripper jaws

Size 20 25 32 40
Width at gripper jaws [mm] 8.3	-0.05	12-0.05	15.2-0.05	18-0.05

Tab. 2: Width of gripper jaws

5.2 Mounting the gripper fingers

Fig. 2: Mounting the gripper fingers

1 Screw
2 Gripper finger
3 Gripper jaw A

4

Gripper jaw A-...-1

5

Gripper jaw A-...-2

- Position the prepared gripper fingers [2] on the gripper jaws [3], [4], [5] and fasten each one with two screws [1]. Fix the gripper jaws in place during mounting and use the specified tightening torque.

Tab. 3: Dimensions and tightening torque

Tab. 4: Dimensions and tightening torque

Tab. 5: Dimensions and tightening torque

Tab. 6: Dimensions and tightening torque

5.3 Mounting gripper

If necessary, mount the proximity switches before mounting the gripper. When using proximity switches for sensing the end position, take the following into account:

• Interference from ferritic attachments, e.g. retaining screws made of ferritic steel.
• Projecting proximity switches, if applicable.
• Cable outlet direction of the proximity switches.
• Sufficient space for the connection components.
• When sensing from both end positions: use separate slots for the proximity switches.

Vertical mounting

1 Thread
2 Locating hole

Fig. 3: Direct mounting via thread in the housing

Size		6	10	16	20	25	32	40
Thread [1]		M3		M4	M5	M6		M8
Depth of thread		10	4.75	6.75	9.6	13	15	18
Tightening torque	[Nm]	0.88	0.69	2.1	4.3	7.9	10	18
Locating hole ø for centring pin [2]	[mm]	-	2^H9	3^H9	4^H9		5^H9
Depth of locating hole	[mm]	-	3		4		5

Tab. 7: Direct mounting via thread in the housing

1 Thread
2 Locating hole (not for size 6)
3 Depth of locating hole (not for size 6)

Fig. 4: Direct mounting via through-hole

Size		6	10	16	20	25	32	40
Thread [1]		M2.5	M2.5	M3	M4	M5		M6
Tightening torque	[Nm]	0.49	0.49	0.88	2.1	4.3		7.3
Locating hole ø for centring pin [2]	[mm]	-	2^H9	3^H9	4^H9		5^H9
Depth of locating hole [3]	[mm]	-	3		4		5

Tab. 8: Direct mounting via through-hole

Horizontal mounting

Fig. 5: Horizontal mounting

1 Locating hole (not for size 6)

2 Thread

Size		6	10	16	20	25	32	40
Thread [2]		M2	M3	M4	M5	M6		M8
Thread depth	[mm]	4.5	4	4.5	7.5	10		13
Tightening torque	[Nm]	0.15	0.9	1.6	3.3	5.9		13.7
Locating hole ø for centring pin [1]	[mm]	-	2^H9	3^H9	4^H9		5^H9
Depth of locating hole	[mm]	-	3	3	4		5

Tab. 9: Horizontal mounting

Mounting on the bottom

Technical line drawing of a mechanical assembly with mounting base and cylindrical component (no text or symbols)

Fig. 6: Mounting on the bottom

1 Thread

2 Locating hole (not for size 6)

3 Positioning via base provided by customer

4 Axial mounting by customer

Size		6	10	16	20	25	32	40
Thread [1]		-	M3	M4	M5	M6		M8
Thread depth	[mm]	-	4	6	10	12	13	17
Tightening torque	[Nm]	-	0.88	2.1	4.3	7.3	7.9	17.7
Locating holeø for centring pin [2]	[mm]	-	2^H9	3^H9	4^H9		5^H9
Depth of locating hole	[mm]	-	3		4		5
Positioning via base provided by customer [3]
Locating holeø	[mm]	-	12^H9	17^H8	21^H8	26^H8	33^H9	41^H9
Depth of locating hole	[mm]	-	1.5	2	3	3.5	4
Axial mounting by customer [4]
Clamping surfaceø	[mm]	8_f8	12_f8	16_f8	20_f8	25_f8		32_f8
Clamping surface height	[mm]	10	15	18	20	23

Tab. 10: Mounting on the bottom

6 Installation

6.1 Pneumatic installation

NOTICE

Loss of function due to contamination in the connections.

- Keep ports and tubing lines free from dirt particles and foreign matter.

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The use of a check valve prevents the payload from dropping in the event of a sudden pressure drop. The use of a one-way flow control valve also permits adjustment of the opening and closing time.

Fig. 7: Connection options

- Connect the compressed air supply to the supply port.

7 Commissioning

WARNING

Risk of injury due to falling loads.

- Before exhausting remove the payload.

1. Slowly pressurise gripper.
2. Set the opening and closing time with an upstream one-way flow control valve: screw in the flow control screw completely and then unscrew it one turn.
3. Perform a test run without payload.

Check the following:

• Allocation of the supply ports
  –The reliable function of the proximity switches (if installed)
• Stop noise of the piston: the piston stop must be soft, that means not audibly hard or metallic.

Piston stop Insight/conclusion

soft The gripper speed is correct	or can be increased. With upstream one-way flow control valve: unscrew the flow control screw slightly. ➔ The gripper speed increases.
hard/metallic The gripper speed	is too high. With an upstream one-way flow control valve: screw in the flow control screw until the piston stop is no longer audibly hard or metallic. ➔ The gripper speed is reduced.

1. Perform a test run with payload.

The gripper must hold the payload securely.

1. After successful test runs:

2. Remove the payload or lock to prevent it from falling.
   -Exhaust the gripper.

8 Maintenance

8.1 Safety

WARNING

Risk of injury due to unexpected movement of the gripper fingers or falling payload.

• Before exhausting: remove the payload at the gripper.
• Disconnect gripper from the compressed air supply.

8.2 Cleaning

Clean the product only with non-abrasive cleaning agents and soft cloths.

9 Malfunctions

9.1 Fault clearance

Error description Cause Remedy
Gripper does not hold payload securely.	Insufficient operating pressure. Increase the operating pressure. Observe the max. permissible value.
	The pressure point of the gripper fingers is too far outwards.	Move the pressure point inwards.
	The payload is too heavy. Select a larger gripper.
	Gripping only with return spring force with incorrect gripping direction.	Use the intended gripping direction.
The gripper does not open/ close.	No compressed air.	Check the supply ports.
	The gripper is faulty.	Replace the faulty parts → www.festo.com/spareparts. Replace the gripper → 9.2 Repair.
The proximity switch does not indicate the gripper status.	The proximity switch is incorrectly adjusted.	Check and adjust the position of the proximity switch → www.festo.com/sp.
	The connecting cable is disconnected.	Replace the connecting cable or proximity switch → .

Tab. 11: Fault clearance

9.2 Repair

Send the product to the Festo repair service for repair.

10

Disassembly

WARNING

Risk of injury due to unexpected movement of the gripper fingers or falling payload.

• Before exhausting: remove the payload at the gripper.

• Disconnect gripper from the compressed air supply.

• Disconnect the gripper from the compressed air supply.

• Remove the supply ports and retaining screws.

11 Technical data

Size		6 10	16
Pneumatic port		M3	M3	M3
Mounting position any
Medium
Operating medium		Compressed air to ISO 8573-1:2010 [7:4:4]
Notes on the operating/pilot medium		lubricated operation possible, in which case lubricated operation will always be required
Temperature
Ambient temperature	[°C]	-10 ... +60
Storage temperature	[°C]	-10 ... +80
Operating pressure
DHPC-...-A	[MPa]	0.15 ... 0.8	0.2 ... 0.8	0.1 ... 0.8
	[bar]	1.5 ... 8	2 ... 8	1 ... 8
	[psi]	22 ... 116 30 ... 116	15 ... 116
DHPC-L-...-A	[MPa]	-	0.2 ... 0.8	0.1 ... 0.8
	[bar]	-	2 ... 8	1 ... 8
	[psi]	-	30 ... 116 15 ... 116
DHPC-...-A-NO/-NC	[MPa]	0.35 ... 0.8	0.35 ... 0.8	0.25 ... 8
	[bar]	3.5 ... 8	3.5 ... 8	2.5 ... 8
	[psi]	51 ... 116 51 ... 116	37 ... 116
Total gripping force at 0.6 MPa (6 bar, 90 psi)
DHPC-...-A
Open [N]	14.6	51.2	125.4
Close [N]	11	43	107.8
DHPC-...-A-NO
Close [N]	7.8	32.8	86.8
DHPC-...-A-NC
Open [N]	10.4	39.2	101

Tab. 12: Technical data

Size		20	25	32	40
Pneumatic port		M5	M5	M5	M5
Mounting position any
Medium
Operating medium		Compressed air to ISO 8573-1:2010 [7:4:4]
Notes on the operating/pilot medium		lubricated operation possible, in which case lubricated operation will always be required
Temperature
Ambient temperature	[°C]	-10 ... +60
Storage temperature	[°C]	-10 ... +80
Operating pressure
DHPC-...-A	[MPa]	0.1 ... 0.8	0.1 ... 0.8	0.1 ... 0.8	0.1 ... 0.8
	[bar]	1 ... 8	1 ... 8	1 ... 8	1 ... 8
	[psi]	15 ... 116	15 ... 116	15 ... 116	15 ... 116
DHPC-L-...-A	[MPa]	0.1 ... 0.8	0.1 ... 0.8	-	-
	[bar]	1 ... 8	1 ... 8	-	-
	[psi]	15 ... 116	15 ... 116	-	-
DHPC-...-A-NO/-NC	[MPa]	0.25 ... 0.8	0.25 ... 0.8	0.25 ... 0.8	0.25 ... 0.8
	[bar]	2.5 ... 8	2.5 ... 8	2.5 ... 8	2.5 ... 8
	[psi]	37 ... 116	37 ... 116	37 ... 116	37 ... 116
Total gripping force at 0.6 MPa (6 bar, 90 psi)
DHPC-...-A
Open	[N]	192.6	305.3	493.7	777.2
Close [N] 159.5	255.6	442.6	717.2
DHPC-...-A-NO
Close [N] 139.4	241.3	415.2	675
DHPC-...-A-NC
Open	[N]	170.9	291.4	465.9	733.5

Tab. 13: Technical data