CN105734243A - Quenching process for automobile leaf spring - Google Patents

Abstract

The invention discloses a quenching process for an automobile leaf spring. The quenching process for the automobile leaf spring comprises the following steps that (1) materials are placed only when the heat preservation temperature of a hearth of a heating furnace is controlled to be 930+/-30 DEG C; (2) the swinging time of a clamp is set strictly according to the process requirement; (5) the discharging time of a steel plate (namely the stepping interval time) is matched with the swinging time, the distance between the clamp and a fire door, the speed of a conveying chain and the like, and steel plates and other clamps are forbidden; (6) swung materials are heated for pilot production; (7) normal production is carried out, specifically, (7.1) the product quality is checked once every 60 min, the check items include quenching hardness, arc height, interval, twisting, lateral bending and appearance, and one piece is checked every time; and (7.2) the clamp is checked once every 60 min, and if deviation occurs, a heat treatment quenching template is used for readjustment until the clamp is qualified; and (8) an operator should pay attention to the situations that (8.1) plates with the width larger than 75 mm can not be quenched when clamped in pairs; and (8.2) the quenched plates should be tempered in time, and the placement time can not exceed 24 h. The quenching process for the automobile leaf spring is reasonable in procedure and low in manufacturing cost.

Description

A kind of leaf springs of car quenching technical

Technical field

The present invention relates to a kind of leaf springs of car quenching technical.

Background technology

Existing leaf springs of car quenching technical exists that procedure arrangement is unreasonable, operation is various, operator's skill requirement is higher so that production cost is higher.

Summary of the invention

Because the drawbacks described above of prior art, the technical problem to be solved be to provide a kind of operation rationally, the leaf springs of car quenching technical of low cost of manufacture.

For achieving the above object, the invention provides

A kind of leaf springs of car quenching technical, comprises the steps:

1) heating furnace burner hearth holding temperature controls to put material when 930 ± 30 DEG C.

2) strictly the time is waved by technological requirement setting clamp:

3) weight spring line:

4) light spring one line, light spring two wires

Supporting main leaf: >=δ × supporting auxiliary: >=δ × 6s of (6 ~ 7) s

Dissipate pin main leaf: >=δ × (5 ~ 6) s and dissipate pin auxiliary: >=δ × 5s

5) steel plate come out of the stove the time (i.e. stepped intervals time) to match from fire door distance and chain speed etc. with the time of waving, clamper, forbid the clip devices such as steel plate；

6) pendulum material heating trial production

6.1) the hardening heat control of steel plate requires as follows:

6.2) when initial workpiece produces, control test requires self-inspection hardness, camber, lateral bending, distortion, gap, outward appearance, is placed by 3 steel plates that initial workpiece produces, asks coroner to confirm, confirm that qualified rear can be mass, and hardness only checks 1；

7) normally produce

7.1) checking 1 product quality every 60 minutes, inspection project includes quenching hardness, camber, gap, distortion, lateral bending, outward appearance, checks 1 every time；

7.2) checking a fixture every 60 minutes, it is qualified to be readjusted to if any deviation heat-treatment quenching model；

8) note

8.1) plate width > plate of 75mm, forbid folder biplate quenching；

8.2) quenching after plate, should tempering in time, lay-by time was less than 24 hours.

The invention has the beneficial effects as follows: operation of the present invention is reasonable, low cost of manufacture.

Detailed description of the invention

Below in conjunction with embodiment, the invention will be further described:

A kind of leaf springs of car quenching technical, comprises the steps:

1) heating furnace burner hearth holding temperature controls to put material when 930 ± 30 DEG C.

2) strictly the time is waved by technological requirement setting clamp:

3) weight spring line:

4) light spring one line, light spring two wires

Supporting main leaf: >=δ × supporting auxiliary: >=δ × 6s of (6 ~ 7) s

Dissipate pin main leaf: >=δ × (5 ~ 6) s and dissipate pin auxiliary: >=δ × 5s

5) steel plate come out of the stove the time (i.e. stepped intervals time) to match from fire door distance and chain speed etc. with the time of waving, clamper, forbid the clip devices such as steel plate；

6) pendulum material heating trial production

6.1) the hardening heat control of steel plate requires as follows:

Material	Enter oil temperature	Instrument holding temperature	Instrument heating-up temperature
				50CrVA	830 ~ 870℃	900~950℃	900~960℃
60Si2Mn	860 ~ 900℃	930~1040℃	950~1050℃
				Sup9	840 ~ 880℃	900~960℃	900~970℃

6.2) when initial workpiece produces, control test requires self-inspection hardness, camber, lateral bending, distortion, gap, outward appearance, is placed by 3 steel plates that initial workpiece produces, asks coroner to confirm, confirm that qualified rear can be mass, and hardness only checks 1；

7) normally produce

7.1) checking 1 product quality every 60 minutes, inspection project includes quenching hardness, camber, gap, distortion, lateral bending, outward appearance, checks 1 every time；

7.2) checking a fixture every 60 minutes, it is qualified to be readjusted to if any deviation heat-treatment quenching model；

8) note

8.1) plate width > plate of 75mm, forbid folder biplate quenching；

8.2) quenching after plate, should tempering in time, lay-by time was less than 24 hours.

Claims (1)

1. a leaf springs of car quenching technical, is characterized in that: comprise the steps:

1) heating furnace burner hearth holding temperature controls to put material when 930 ± 30 DEG C；

2) strictly the time is waved by technological requirement setting clamp:

3) weight spring line:

4) light spring one line, light spring two wires

Supporting main leaf: >=δ × supporting auxiliary: >=δ × 6s of (6 ~ 7) s

Dissipate pin main leaf: >=δ × (5 ~ 6) s and dissipate pin auxiliary: >=δ × 5s

5) steel plate come out of the stove the time (i.e. stepped intervals time) to match from fire door distance and chain speed etc. with the time of waving, clamper, forbid the clip devices such as steel plate；

6) pendulum material heating trial production

6.1) the hardening heat control of steel plate requires as follows:

6.2) when initial workpiece produces, control test requires self-inspection hardness, camber, lateral bending, distortion, gap, outward appearance, is placed by 3 steel plates that initial workpiece produces, asks coroner to confirm, confirm that qualified rear can be mass, and hardness only checks 1；

7) normally produce

7.1) checking 1 product quality every 60 minutes, inspection project includes quenching hardness, camber, gap, distortion, lateral bending, outward appearance, checks 1 every time；

7.2) checking a fixture every 60 minutes, it is qualified to be readjusted to if any deviation heat-treatment quenching model；

8) note

8.1) plate width > plate of 75mm, forbid folder biplate quenching；

8.2) quenching after plate, should tempering in time, lay-by time was less than 24 hours.