JPH0731893A - Inertial cone crusher and its manufacture - Google Patents

Abstract

PURPOSE:To realize an inertial cone crusher whose service life is prolonged by working and hardening the contact surface of a mantle with a concave by a treatment in a short time at a low cost and to provide a manufacturing method thereof. CONSTITUTION:In an inertial cone crusher, a cone head 7 is supported by a spherical supporting body 6 provided in a crusher shell 3. A mantle 8 fitted to the cone head 7 is rolled on the internal surface of a concave 4 fitted to the crusher shell 3 and a supplied raw ore is crushed. After manufacture and fabrication of the inertial cone crusher or after the mantle 8 and the concave 4 are replaced and assembled, the inertial cone crusher is operated for a prescribed time in a state wherein raw ore is not supplied. Thereby the cone head 7 is rolled and the contact part of the mantle 8 with the concave 4 is worked and hardened.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an inertial cone crusher. More specifically, the present invention relates to an inertial cone crusher having improved durability of a mantle and a cone cave in a rough crushing section, and a method for manufacturing the same.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional inertial cone crusher has a crusher shell 3 mounted on a base 1 via a vibration damper 2 and a corn cave 4 mounted on the crusher shell 3. A bowl 5 is attached, a spherical support 6 is provided inside the crusher shell 3, and a conical head 7 having a mantle 8 mounted thereon is placed on the spherical support 6, and the spherical support 6 is attached. An annular seal 18 is fixed to the annular mounting portion 6a formed on the. On the other hand, the conical head 7 side is formed with an annular contact surface 7a with which the lip portion of the annular seal 18 abuts.

A main shaft 9 is attached to the lower side of the conical head 7, and a bearing sleeve 10 having an unbalanced weight 11 is loosely fitted to the main shaft 9, and the bearing sleeve 10 is driven by a rotary drive mechanism. Rotational force is transmitted. The rotation driving mechanism includes a motor 17, a V pulley 15 rotated from the motor 17 via a V belt 16, and an intermediate shaft 1 connected to the V pulley 15 by an elastic coupling 14.
2 and a ball spindle 13 having one end connected to the intermediate shaft 12, and the other end of the ball spindle 13 is connected to the bearing sleeve 10.

When the bearing sleeve 10 is rotated by the rotary drive mechanism, a centrifugal force is generated by the unbalanced weight 11 to swing the main shaft 9, so that the conical head 7 on the spherical support 6 rotates while swinging. As a result, the mantle 8 attached to the conical head 7 rolls on the inner surface of the cone cave 4 to crush the rough stone supplied from above the crusher shell 3. At this time, the annular seal 18 follows the annular abutting surface 7a of the conical head 7 which rotates while swinging due to its elasticity, and prevents dust from entering the inside of the crusher shell 3.

[0005]

In the conventional inertial cone crushing machine, the rough crushing surfaces of the mantle 8 and the cone cave 4 are not particularly hardened. Then, after the manufacturing and assembling, or after the mantle 8 and the cone cave 4 were replaced and assembled for maintenance, the rough stone was crushed immediately. For this reason, there has been a problem that the rough crushed surfaces of the mantle 8 and the cone cave 4 are quickly worn and have a short life.

In view of the above-mentioned conventional problems, the present invention provides an inertial cone crusher and a method for manufacturing the same, which can extend the life of the contact surfaces of the mantle and the cone cave by work hardening in a short time and at low cost. Aim to achieve.

[0007]

In the method for manufacturing an inertial conical crusher according to the present invention, the spherical head 6 provided in the crusher shell 3 supports the conical head 7 and attaches to the conical head 7. The mantle 8 rolls the inner surface of the cone cave 4 attached to the crusher shell 3 and crushes the raw ore to be crushed in an inertial conical crusher. After manufacturing and assembling the mantle 8 and corn cave 4, the rough is supplied. The conical head 7 rolls by operating for a predetermined time in a state where the mantle 8 and the cone cave 4 come into contact with each other.
It is characterized in that a and 4a are work-hardened.

In addition, the angles of the lower portion of the mantle 8 and the cone cave 4 are A and B, the rolling gap is s, and the distance from the lower end of the contact portion to the spherical center of the spherical seat of the spherical support 6 is The angle A of the contact part of the mantle 8 when r
Is characterized in that the contact portion has a uniform length so that A = B− (s / 2πr) × 360.

Further, the inertial cone crusher of the present invention is characterized by being manufactured by the above-mentioned method for manufacturing the inertial cone crusher.

By adopting this constitution, it is possible to obtain an inertial conical crusher and a method for manufacturing the same, in which the contact surfaces of the mantle and the cone cave can be work-hardened by a short-time and low-cost treatment to extend the life thereof.

[0011]

According to the present invention, the contact surfaces of the cone cave 4 and the mantle 8 are brought into contact with each other by operating for a predetermined time without supplying rough stones after manufacturing and assembling the inertial conical crusher or exchanging and assembling the mantle and the cone cave. Then, the surface is worked and hardened. Therefore, the wear resistance is improved and the life is extended.

When the angle of the contact portion of the cone cave 4 is B, the clearance for rolling the cone cave 4 and the mantle 8 is s, and the distance from the lower end of the contact portion to the spherical center of the spherical seat of the spherical support 6 is r. , The angle A of the contact portion of the mantle 8
By setting A = B- (s / 2πr) × 360, when the mantle 8 is rolled, the entire length of the contact portion comes into contact with and hits the entire surface, so that uniform work hardening of the entire contact portion is possible. Become.

[0013]

1 and 2 are views for explaining an inertial conical crusher and a method of manufacturing the same according to the present invention. As shown in FIG. 1, an inertial cone crusher according to the method of the present invention has a crusher shell 3 in which a bowl 5 having a cone cave 4 is mounted on an upper portion thereof and a spherical support 6 is provided therein, and the spherical support 6 Bearing sleeve 1 having a conical head 7 mounted on the upper surface, a mantle 8 mounted on the upper surface thereof, and a spindle 9 provided on the lower portion thereof, and an unbalanced weight 11 loosely fitted on the spindle 9.
0, a rotary drive mechanism that rotationally drives the bearing sleeve (composed of a motor 17, a V belt 16, a V pulley 15, an elastic coupling 14, an intermediate shaft 12, a ball spindle 13, etc.), a spherical support 6 and a cone. And an annular seal 19 provided between the head 7 and the head 7.

The above is the same as the conventional example described in FIG. A feature of the method of the present invention is that after the above apparatus is assembled, it is operated for a predetermined time without supplying rough stones. By this operation, the unbalanced weight 11 generates a centrifugal force, and the bearing sleeve 10
The main shaft 9 is swung via. As a result, the conical head 7 is eccentrically swung around the spherical support 6 so that the conical head 7
The mantle 8 attached to the roller contacts the inner circumference of the cone cave 4 and rolls while applying pressure. As a result, as shown in FIG. 2, the contact surfaces of the cone cave 4 and the mantle 8 are work-hardened to form the cone-cave hardened portion 4a and the mantle work-hardened portion 8a.

3 to 5 are diagrams showing the dimensions of the angle calculation formulas for the cone cave and the mantle according to the method of the present invention.
In FIG. 3, the dimension from the spherical center o of the spherical support 6 to the lower end of the cone cave 4 is r, and the gap for rolling (the cone cave 4 and the mantle 8 when the main axis of the cone head is vertical).
Is defined as s, and the cone cave 4 of FIG.
The length of the surface 4a intended for rolling is 1 ₂ and the angle with the horizontal is B, and the surface 8a intended for rolling of the mantle 8 in FIG.
The length of a is l ₁ (l ₁ and l ₂ have almost the same length),
When the angle formed by the horizontal is A, A = B- (s / 2π
r) × 360.

Since the mantle 8 formed in this way swings at an angle of (s / 2πr) × 360 ° about the spherical center O of the spherical seat of the spherical support 6 during operation, its contact surface 8a. When touches the contact surface 4a of the cone cave 4, the angles of the contact surface are the same. As a result, the contact is made over almost the entire length (l ₁ or l ₂ ). Therefore, when curing, the contact area will come into full contact with the unbalanced weight 1.
The centrifugal force of 1 acts smoothly, and a uniform work-hardened layer is formed on the entire surface.

It is preferable that the dimension of s is not more than the dimension for crushing the ordinary gemstone in consideration of the increase due to work hardening.
The actual dimensions of s and l ₁ ≈l ₂ are appropriate as shown in Table 1.

[0018]

[Table 1]

As a practical example of work hardening, in the case of 1200 type (mantle outer diameter 1200 mm), when the operation was performed for 30 minutes at half the normal rotational speed, the surface hardness was about 45 ° in Shore hardness. The result was 60 ° or more, sufficient work hardening was obtained, and the life was about three times as long as that of the non-hardened conventional product.

[0020]

According to the present invention, after the inertial conical crusher is assembled or the cone cave and the mantle are exchanged and assembled for maintenance, the mantle is operated without feeding the rough stone to roll the mantle on the inner surface of the cone cave. This makes it possible to work-harden the contact surface between the two and to extend the life of the cone cave and the mantle with a short-time and low-cost treatment.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an inertial cone crusher of the present invention and a method for manufacturing the same.

FIG. 2 is a view showing a work hardening part of a cone cave and a mantle according to the method of the present invention.

FIG. 3 is a diagram showing the dimensions of a cone cave and mantle angle calculation formula according to the method of the present invention.

FIG. 4 is a diagram showing the dimensions of an angle calculation formula for a cone cave and a mantle according to the method of the present invention.

FIG. 5 is a diagram showing the dimensions of an angle calculation formula for a cone cave and a mantle according to the method of the present invention.

FIG. 6 is a view showing a conventional inertial cone crusher.

[Explanation of symbols]

 3 ... Crusher shell 4 ... Cone cave 4a ... Cone cave work hardening part (contact surface) 6 ... Spherical support 7 ... Cone head 8 ... Mantle 8a ... Mantle work hardening part (contact surface) 9 ... Main shaft 10 ... Bearing sleeve 11 ... Unbalanced weight

Claims (3)

[Claims] 1. A spherical head support (6) provided in a crusher shell (3) supports a conical head (7), and a mantle (8) attached to the conical head (7) comprises a crusher shell (6). In an inertial cone crusher that rolls the inner surface of the cone cave (4) attached to 3) and crushes the raw ore, after the manufacturing and assembly, or after the mantle (8) and cone cave (4) are replaced and assembled, the rough stone is not supplied. The conical head (7) is rolled by operating for a predetermined time in this state, and the contact portions (8a, 4a) between the mantle (8) and the cone cave (4) are moved.
A method for manufacturing an inertial cone crusher, which comprises subjecting a) to work hardening. 2. The angle between the mantle (8) and the lower portion of the cone cave (4) is A and B, the rolling gap is s, and the distance from the lower end of the contact portion to the spherical center of the spherical seat of the spherical support (6). The length of the contact portion is uniformly processed so that the angle A of the contact portion of the mantle (8) is A = B- (s / 2πr) × 360, where r is the distance. Item 1. A method for manufacturing an inertial cone crusher according to item 1. 3. An inertial conical crusher manufactured by the method for manufacturing an inertial conical crusher according to claim 1 or 2.